math.exp on complex, imaginary part

Percentage Accurate: 100.0% → 100.0%
Time: 7.4s
Alternatives: 11
Speedup: 203.0×

Specification

?
\[e^{re} \cdot \sin im \]

Your Program's Arguments

Results

Enter valid numbers for all inputs

Local Percentage Accuracy vs ?

The average percentage accuracy by input value. Horizontal axis shows value of an input variable; the variable is choosen in the title. Vertical axis is accuracy; higher is better. Red represent the original program, while blue represents Herbie's suggestion. These can be toggled with buttons below the plot. The line is an average while dots represent individual samples.

Accuracy vs Speed?

Herbie found 11 alternatives:

AlternativeAccuracySpeedup
The accuracy (vertical axis) and speed (horizontal axis) of each alternatives. Up and to the right is better. The red square shows the initial program, and each blue circle shows an alternative.The line shows the best available speed-accuracy tradeoffs.

Alternative 1: 100.0% accurate, 1.0× speedup?

\[e^{re} \cdot \sin im \]
Derivation
  1. Initial program 100.0%

    \[e^{re} \cdot \sin im \]
  2. Final simplification100.0%

    \[\leadsto e^{re} \cdot \sin im \]

Alternative 2: 92.4% accurate, 0.7× speedup?

\[\begin{array}{l} \mathbf{if}\;e^{re} \leq 0:\\ \;\;\;\;0\\ \mathbf{elif}\;e^{re} \leq 1.001:\\ \;\;\;\;\sin im\\ \mathbf{else}:\\ \;\;\;\;e^{re} \cdot im\\ \end{array} \]
Derivation
  1. Split input into 3 regimes
  2. if (exp.f64 re) < 0.0

    1. Initial program 100.0%

      \[e^{re} \cdot \sin im \]
    2. Step-by-step derivation
      1. expm1-log1p-u100.0%

        \[\leadsto \color{blue}{\mathsf{expm1}\left(\mathsf{log1p}\left(e^{re} \cdot \sin im\right)\right)} \]
      2. expm1-udef100.0%

        \[\leadsto \color{blue}{e^{\mathsf{log1p}\left(e^{re} \cdot \sin im\right)} - 1} \]
      3. log1p-udef100.0%

        \[\leadsto e^{\color{blue}{\log \left(1 + e^{re} \cdot \sin im\right)}} - 1 \]
      4. add-exp-log100.0%

        \[\leadsto \color{blue}{\left(1 + e^{re} \cdot \sin im\right)} - 1 \]
    3. Applied egg-rr100.0%

      \[\leadsto \color{blue}{\left(1 + e^{re} \cdot \sin im\right) - 1} \]
    4. Taylor expanded in im around 0 100.0%

      \[\leadsto \color{blue}{1} - 1 \]

    if 0.0 < (exp.f64 re) < 1.0009999999999999

    1. Initial program 100.0%

      \[e^{re} \cdot \sin im \]
    2. Taylor expanded in re around 0 98.0%

      \[\leadsto \color{blue}{\sin im} \]

    if 1.0009999999999999 < (exp.f64 re)

    1. Initial program 100.0%

      \[e^{re} \cdot \sin im \]
    2. Taylor expanded in im around 0 82.9%

      \[\leadsto \color{blue}{e^{re} \cdot im} \]
  3. Recombined 3 regimes into one program.
  4. Final simplification94.1%

    \[\leadsto \begin{array}{l} \mathbf{if}\;e^{re} \leq 0:\\ \;\;\;\;0\\ \mathbf{elif}\;e^{re} \leq 1.001:\\ \;\;\;\;\sin im\\ \mathbf{else}:\\ \;\;\;\;e^{re} \cdot im\\ \end{array} \]

Alternative 3: 96.3% accurate, 1.8× speedup?

\[\begin{array}{l} \mathbf{if}\;re \leq -85:\\ \;\;\;\;0\\ \mathbf{elif}\;re \leq 0.00145:\\ \;\;\;\;\sin im \cdot \left(\left(re + 1\right) + 0.5 \cdot \left(re \cdot re\right)\right)\\ \mathbf{elif}\;re \leq 1.85 \cdot 10^{+154}:\\ \;\;\;\;e^{re} \cdot im\\ \mathbf{else}:\\ \;\;\;\;\sin im \cdot \left(re \cdot \left(re \cdot 0.5\right)\right)\\ \end{array} \]
Derivation
  1. Split input into 4 regimes
  2. if re < -85

    1. Initial program 100.0%

      \[e^{re} \cdot \sin im \]
    2. Step-by-step derivation
      1. expm1-log1p-u100.0%

        \[\leadsto \color{blue}{\mathsf{expm1}\left(\mathsf{log1p}\left(e^{re} \cdot \sin im\right)\right)} \]
      2. expm1-udef100.0%

        \[\leadsto \color{blue}{e^{\mathsf{log1p}\left(e^{re} \cdot \sin im\right)} - 1} \]
      3. log1p-udef100.0%

        \[\leadsto e^{\color{blue}{\log \left(1 + e^{re} \cdot \sin im\right)}} - 1 \]
      4. add-exp-log100.0%

        \[\leadsto \color{blue}{\left(1 + e^{re} \cdot \sin im\right)} - 1 \]
    3. Applied egg-rr100.0%

      \[\leadsto \color{blue}{\left(1 + e^{re} \cdot \sin im\right) - 1} \]
    4. Taylor expanded in im around 0 100.0%

      \[\leadsto \color{blue}{1} - 1 \]

    if -85 < re < 0.00145

    1. Initial program 100.0%

      \[e^{re} \cdot \sin im \]
    2. Taylor expanded in re around 0 99.5%

      \[\leadsto \color{blue}{\sin im + \left(\sin im \cdot re + 0.5 \cdot \left(\sin im \cdot {re}^{2}\right)\right)} \]
    3. Step-by-step derivation
      1. *-rgt-identity99.5%

        \[\leadsto \color{blue}{\sin im \cdot 1} + \left(\sin im \cdot re + 0.5 \cdot \left(\sin im \cdot {re}^{2}\right)\right) \]
      2. *-commutative99.5%

        \[\leadsto \sin im \cdot 1 + \left(\sin im \cdot re + \color{blue}{\left(\sin im \cdot {re}^{2}\right) \cdot 0.5}\right) \]
      3. associate-*l*99.5%

        \[\leadsto \sin im \cdot 1 + \left(\sin im \cdot re + \color{blue}{\sin im \cdot \left({re}^{2} \cdot 0.5\right)}\right) \]
      4. distribute-lft-out99.5%

        \[\leadsto \sin im \cdot 1 + \color{blue}{\sin im \cdot \left(re + {re}^{2} \cdot 0.5\right)} \]
      5. distribute-lft-out99.5%

        \[\leadsto \color{blue}{\sin im \cdot \left(1 + \left(re + {re}^{2} \cdot 0.5\right)\right)} \]
      6. associate-+l+99.5%

        \[\leadsto \sin im \cdot \color{blue}{\left(\left(1 + re\right) + {re}^{2} \cdot 0.5\right)} \]
      7. +-commutative99.5%

        \[\leadsto \sin im \cdot \left(\color{blue}{\left(re + 1\right)} + {re}^{2} \cdot 0.5\right) \]
      8. *-commutative99.5%

        \[\leadsto \sin im \cdot \left(\left(re + 1\right) + \color{blue}{0.5 \cdot {re}^{2}}\right) \]
      9. unpow299.5%

        \[\leadsto \sin im \cdot \left(\left(re + 1\right) + 0.5 \cdot \color{blue}{\left(re \cdot re\right)}\right) \]
    4. Simplified99.5%

      \[\leadsto \color{blue}{\sin im \cdot \left(\left(re + 1\right) + 0.5 \cdot \left(re \cdot re\right)\right)} \]

    if 0.00145 < re < 1.84999999999999997e154

    1. Initial program 100.0%

      \[e^{re} \cdot \sin im \]
    2. Taylor expanded in im around 0 78.9%

      \[\leadsto \color{blue}{e^{re} \cdot im} \]

    if 1.84999999999999997e154 < re

    1. Initial program 100.0%

      \[e^{re} \cdot \sin im \]
    2. Taylor expanded in re around 0 100.0%

      \[\leadsto \color{blue}{\sin im + \left(\sin im \cdot re + 0.5 \cdot \left(\sin im \cdot {re}^{2}\right)\right)} \]
    3. Step-by-step derivation
      1. *-rgt-identity100.0%

        \[\leadsto \color{blue}{\sin im \cdot 1} + \left(\sin im \cdot re + 0.5 \cdot \left(\sin im \cdot {re}^{2}\right)\right) \]
      2. *-commutative100.0%

        \[\leadsto \sin im \cdot 1 + \left(\sin im \cdot re + \color{blue}{\left(\sin im \cdot {re}^{2}\right) \cdot 0.5}\right) \]
      3. associate-*l*100.0%

        \[\leadsto \sin im \cdot 1 + \left(\sin im \cdot re + \color{blue}{\sin im \cdot \left({re}^{2} \cdot 0.5\right)}\right) \]
      4. distribute-lft-out100.0%

        \[\leadsto \sin im \cdot 1 + \color{blue}{\sin im \cdot \left(re + {re}^{2} \cdot 0.5\right)} \]
      5. distribute-lft-out100.0%

        \[\leadsto \color{blue}{\sin im \cdot \left(1 + \left(re + {re}^{2} \cdot 0.5\right)\right)} \]
      6. associate-+l+100.0%

        \[\leadsto \sin im \cdot \color{blue}{\left(\left(1 + re\right) + {re}^{2} \cdot 0.5\right)} \]
      7. +-commutative100.0%

        \[\leadsto \sin im \cdot \left(\color{blue}{\left(re + 1\right)} + {re}^{2} \cdot 0.5\right) \]
      8. *-commutative100.0%

        \[\leadsto \sin im \cdot \left(\left(re + 1\right) + \color{blue}{0.5 \cdot {re}^{2}}\right) \]
      9. unpow2100.0%

        \[\leadsto \sin im \cdot \left(\left(re + 1\right) + 0.5 \cdot \color{blue}{\left(re \cdot re\right)}\right) \]
    4. Simplified100.0%

      \[\leadsto \color{blue}{\sin im \cdot \left(\left(re + 1\right) + 0.5 \cdot \left(re \cdot re\right)\right)} \]
    5. Taylor expanded in re around inf 100.0%

      \[\leadsto \color{blue}{0.5 \cdot \left(\sin im \cdot {re}^{2}\right)} \]
    6. Step-by-step derivation
      1. *-commutative100.0%

        \[\leadsto \color{blue}{\left(\sin im \cdot {re}^{2}\right) \cdot 0.5} \]
      2. unpow2100.0%

        \[\leadsto \left(\sin im \cdot \color{blue}{\left(re \cdot re\right)}\right) \cdot 0.5 \]
      3. associate-*r*100.0%

        \[\leadsto \color{blue}{\sin im \cdot \left(\left(re \cdot re\right) \cdot 0.5\right)} \]
      4. associate-*r*100.0%

        \[\leadsto \sin im \cdot \color{blue}{\left(re \cdot \left(re \cdot 0.5\right)\right)} \]
    7. Simplified100.0%

      \[\leadsto \color{blue}{\sin im \cdot \left(re \cdot \left(re \cdot 0.5\right)\right)} \]
  3. Recombined 4 regimes into one program.
  4. Final simplification96.6%

    \[\leadsto \begin{array}{l} \mathbf{if}\;re \leq -85:\\ \;\;\;\;0\\ \mathbf{elif}\;re \leq 0.00145:\\ \;\;\;\;\sin im \cdot \left(\left(re + 1\right) + 0.5 \cdot \left(re \cdot re\right)\right)\\ \mathbf{elif}\;re \leq 1.85 \cdot 10^{+154}:\\ \;\;\;\;e^{re} \cdot im\\ \mathbf{else}:\\ \;\;\;\;\sin im \cdot \left(re \cdot \left(re \cdot 0.5\right)\right)\\ \end{array} \]

Alternative 4: 96.1% accurate, 1.8× speedup?

\[\begin{array}{l} \mathbf{if}\;re \leq -1:\\ \;\;\;\;0\\ \mathbf{elif}\;re \leq 0.00019:\\ \;\;\;\;\sin im \cdot \left(re + 1\right)\\ \mathbf{elif}\;re \leq 1.85 \cdot 10^{+154}:\\ \;\;\;\;e^{re} \cdot im\\ \mathbf{else}:\\ \;\;\;\;\sin im \cdot \left(re \cdot \left(re \cdot 0.5\right)\right)\\ \end{array} \]
Derivation
  1. Split input into 4 regimes
  2. if re < -1

    1. Initial program 100.0%

      \[e^{re} \cdot \sin im \]
    2. Step-by-step derivation
      1. expm1-log1p-u100.0%

        \[\leadsto \color{blue}{\mathsf{expm1}\left(\mathsf{log1p}\left(e^{re} \cdot \sin im\right)\right)} \]
      2. expm1-udef100.0%

        \[\leadsto \color{blue}{e^{\mathsf{log1p}\left(e^{re} \cdot \sin im\right)} - 1} \]
      3. log1p-udef100.0%

        \[\leadsto e^{\color{blue}{\log \left(1 + e^{re} \cdot \sin im\right)}} - 1 \]
      4. add-exp-log100.0%

        \[\leadsto \color{blue}{\left(1 + e^{re} \cdot \sin im\right)} - 1 \]
    3. Applied egg-rr100.0%

      \[\leadsto \color{blue}{\left(1 + e^{re} \cdot \sin im\right) - 1} \]
    4. Taylor expanded in im around 0 100.0%

      \[\leadsto \color{blue}{1} - 1 \]

    if -1 < re < 1.9000000000000001e-4

    1. Initial program 100.0%

      \[e^{re} \cdot \sin im \]
    2. Taylor expanded in re around 0 99.2%

      \[\leadsto \color{blue}{\sin im + \sin im \cdot re} \]
    3. Step-by-step derivation
      1. +-commutative99.2%

        \[\leadsto \color{blue}{\sin im \cdot re + \sin im} \]
      2. *-rgt-identity99.2%

        \[\leadsto \sin im \cdot re + \color{blue}{\sin im \cdot 1} \]
      3. distribute-lft-out99.2%

        \[\leadsto \color{blue}{\sin im \cdot \left(re + 1\right)} \]
    4. Simplified99.2%

      \[\leadsto \color{blue}{\sin im \cdot \left(re + 1\right)} \]

    if 1.9000000000000001e-4 < re < 1.84999999999999997e154

    1. Initial program 100.0%

      \[e^{re} \cdot \sin im \]
    2. Taylor expanded in im around 0 78.9%

      \[\leadsto \color{blue}{e^{re} \cdot im} \]

    if 1.84999999999999997e154 < re

    1. Initial program 100.0%

      \[e^{re} \cdot \sin im \]
    2. Taylor expanded in re around 0 100.0%

      \[\leadsto \color{blue}{\sin im + \left(\sin im \cdot re + 0.5 \cdot \left(\sin im \cdot {re}^{2}\right)\right)} \]
    3. Step-by-step derivation
      1. *-rgt-identity100.0%

        \[\leadsto \color{blue}{\sin im \cdot 1} + \left(\sin im \cdot re + 0.5 \cdot \left(\sin im \cdot {re}^{2}\right)\right) \]
      2. *-commutative100.0%

        \[\leadsto \sin im \cdot 1 + \left(\sin im \cdot re + \color{blue}{\left(\sin im \cdot {re}^{2}\right) \cdot 0.5}\right) \]
      3. associate-*l*100.0%

        \[\leadsto \sin im \cdot 1 + \left(\sin im \cdot re + \color{blue}{\sin im \cdot \left({re}^{2} \cdot 0.5\right)}\right) \]
      4. distribute-lft-out100.0%

        \[\leadsto \sin im \cdot 1 + \color{blue}{\sin im \cdot \left(re + {re}^{2} \cdot 0.5\right)} \]
      5. distribute-lft-out100.0%

        \[\leadsto \color{blue}{\sin im \cdot \left(1 + \left(re + {re}^{2} \cdot 0.5\right)\right)} \]
      6. associate-+l+100.0%

        \[\leadsto \sin im \cdot \color{blue}{\left(\left(1 + re\right) + {re}^{2} \cdot 0.5\right)} \]
      7. +-commutative100.0%

        \[\leadsto \sin im \cdot \left(\color{blue}{\left(re + 1\right)} + {re}^{2} \cdot 0.5\right) \]
      8. *-commutative100.0%

        \[\leadsto \sin im \cdot \left(\left(re + 1\right) + \color{blue}{0.5 \cdot {re}^{2}}\right) \]
      9. unpow2100.0%

        \[\leadsto \sin im \cdot \left(\left(re + 1\right) + 0.5 \cdot \color{blue}{\left(re \cdot re\right)}\right) \]
    4. Simplified100.0%

      \[\leadsto \color{blue}{\sin im \cdot \left(\left(re + 1\right) + 0.5 \cdot \left(re \cdot re\right)\right)} \]
    5. Taylor expanded in re around inf 100.0%

      \[\leadsto \color{blue}{0.5 \cdot \left(\sin im \cdot {re}^{2}\right)} \]
    6. Step-by-step derivation
      1. *-commutative100.0%

        \[\leadsto \color{blue}{\left(\sin im \cdot {re}^{2}\right) \cdot 0.5} \]
      2. unpow2100.0%

        \[\leadsto \left(\sin im \cdot \color{blue}{\left(re \cdot re\right)}\right) \cdot 0.5 \]
      3. associate-*r*100.0%

        \[\leadsto \color{blue}{\sin im \cdot \left(\left(re \cdot re\right) \cdot 0.5\right)} \]
      4. associate-*r*100.0%

        \[\leadsto \sin im \cdot \color{blue}{\left(re \cdot \left(re \cdot 0.5\right)\right)} \]
    7. Simplified100.0%

      \[\leadsto \color{blue}{\sin im \cdot \left(re \cdot \left(re \cdot 0.5\right)\right)} \]
  3. Recombined 4 regimes into one program.
  4. Final simplification96.5%

    \[\leadsto \begin{array}{l} \mathbf{if}\;re \leq -1:\\ \;\;\;\;0\\ \mathbf{elif}\;re \leq 0.00019:\\ \;\;\;\;\sin im \cdot \left(re + 1\right)\\ \mathbf{elif}\;re \leq 1.85 \cdot 10^{+154}:\\ \;\;\;\;e^{re} \cdot im\\ \mathbf{else}:\\ \;\;\;\;\sin im \cdot \left(re \cdot \left(re \cdot 0.5\right)\right)\\ \end{array} \]

Alternative 5: 93.0% accurate, 1.9× speedup?

\[\begin{array}{l} \mathbf{if}\;re \leq -1:\\ \;\;\;\;0\\ \mathbf{elif}\;re \leq 4 \cdot 10^{-5}:\\ \;\;\;\;\sin im \cdot \left(re + 1\right)\\ \mathbf{else}:\\ \;\;\;\;e^{re} \cdot im\\ \end{array} \]
Derivation
  1. Split input into 3 regimes
  2. if re < -1

    1. Initial program 100.0%

      \[e^{re} \cdot \sin im \]
    2. Step-by-step derivation
      1. expm1-log1p-u100.0%

        \[\leadsto \color{blue}{\mathsf{expm1}\left(\mathsf{log1p}\left(e^{re} \cdot \sin im\right)\right)} \]
      2. expm1-udef100.0%

        \[\leadsto \color{blue}{e^{\mathsf{log1p}\left(e^{re} \cdot \sin im\right)} - 1} \]
      3. log1p-udef100.0%

        \[\leadsto e^{\color{blue}{\log \left(1 + e^{re} \cdot \sin im\right)}} - 1 \]
      4. add-exp-log100.0%

        \[\leadsto \color{blue}{\left(1 + e^{re} \cdot \sin im\right)} - 1 \]
    3. Applied egg-rr100.0%

      \[\leadsto \color{blue}{\left(1 + e^{re} \cdot \sin im\right) - 1} \]
    4. Taylor expanded in im around 0 100.0%

      \[\leadsto \color{blue}{1} - 1 \]

    if -1 < re < 4.00000000000000033e-5

    1. Initial program 100.0%

      \[e^{re} \cdot \sin im \]
    2. Taylor expanded in re around 0 99.2%

      \[\leadsto \color{blue}{\sin im + \sin im \cdot re} \]
    3. Step-by-step derivation
      1. +-commutative99.2%

        \[\leadsto \color{blue}{\sin im \cdot re + \sin im} \]
      2. *-rgt-identity99.2%

        \[\leadsto \sin im \cdot re + \color{blue}{\sin im \cdot 1} \]
      3. distribute-lft-out99.2%

        \[\leadsto \color{blue}{\sin im \cdot \left(re + 1\right)} \]
    4. Simplified99.2%

      \[\leadsto \color{blue}{\sin im \cdot \left(re + 1\right)} \]

    if 4.00000000000000033e-5 < re

    1. Initial program 100.0%

      \[e^{re} \cdot \sin im \]
    2. Taylor expanded in im around 0 82.9%

      \[\leadsto \color{blue}{e^{re} \cdot im} \]
  3. Recombined 3 regimes into one program.
  4. Final simplification94.6%

    \[\leadsto \begin{array}{l} \mathbf{if}\;re \leq -1:\\ \;\;\;\;0\\ \mathbf{elif}\;re \leq 4 \cdot 10^{-5}:\\ \;\;\;\;\sin im \cdot \left(re + 1\right)\\ \mathbf{else}:\\ \;\;\;\;e^{re} \cdot im\\ \end{array} \]

Alternative 6: 84.9% accurate, 1.9× speedup?

\[\begin{array}{l} \mathbf{if}\;re \leq -54:\\ \;\;\;\;0\\ \mathbf{elif}\;re \leq 14.2:\\ \;\;\;\;\sin im\\ \mathbf{else}:\\ \;\;\;\;im \cdot \left(re \cdot \left(re \cdot 0.5\right)\right)\\ \end{array} \]
Derivation
  1. Split input into 3 regimes
  2. if re < -54

    1. Initial program 100.0%

      \[e^{re} \cdot \sin im \]
    2. Step-by-step derivation
      1. expm1-log1p-u100.0%

        \[\leadsto \color{blue}{\mathsf{expm1}\left(\mathsf{log1p}\left(e^{re} \cdot \sin im\right)\right)} \]
      2. expm1-udef100.0%

        \[\leadsto \color{blue}{e^{\mathsf{log1p}\left(e^{re} \cdot \sin im\right)} - 1} \]
      3. log1p-udef100.0%

        \[\leadsto e^{\color{blue}{\log \left(1 + e^{re} \cdot \sin im\right)}} - 1 \]
      4. add-exp-log100.0%

        \[\leadsto \color{blue}{\left(1 + e^{re} \cdot \sin im\right)} - 1 \]
    3. Applied egg-rr100.0%

      \[\leadsto \color{blue}{\left(1 + e^{re} \cdot \sin im\right) - 1} \]
    4. Taylor expanded in im around 0 100.0%

      \[\leadsto \color{blue}{1} - 1 \]

    if -54 < re < 14.199999999999999

    1. Initial program 99.9%

      \[e^{re} \cdot \sin im \]
    2. Taylor expanded in re around 0 96.7%

      \[\leadsto \color{blue}{\sin im} \]

    if 14.199999999999999 < re

    1. Initial program 100.0%

      \[e^{re} \cdot \sin im \]
    2. Taylor expanded in re around 0 53.7%

      \[\leadsto \color{blue}{\sin im + \left(\sin im \cdot re + 0.5 \cdot \left(\sin im \cdot {re}^{2}\right)\right)} \]
    3. Step-by-step derivation
      1. *-rgt-identity53.7%

        \[\leadsto \color{blue}{\sin im \cdot 1} + \left(\sin im \cdot re + 0.5 \cdot \left(\sin im \cdot {re}^{2}\right)\right) \]
      2. *-commutative53.7%

        \[\leadsto \sin im \cdot 1 + \left(\sin im \cdot re + \color{blue}{\left(\sin im \cdot {re}^{2}\right) \cdot 0.5}\right) \]
      3. associate-*l*53.7%

        \[\leadsto \sin im \cdot 1 + \left(\sin im \cdot re + \color{blue}{\sin im \cdot \left({re}^{2} \cdot 0.5\right)}\right) \]
      4. distribute-lft-out53.7%

        \[\leadsto \sin im \cdot 1 + \color{blue}{\sin im \cdot \left(re + {re}^{2} \cdot 0.5\right)} \]
      5. distribute-lft-out53.7%

        \[\leadsto \color{blue}{\sin im \cdot \left(1 + \left(re + {re}^{2} \cdot 0.5\right)\right)} \]
      6. associate-+l+53.7%

        \[\leadsto \sin im \cdot \color{blue}{\left(\left(1 + re\right) + {re}^{2} \cdot 0.5\right)} \]
      7. +-commutative53.7%

        \[\leadsto \sin im \cdot \left(\color{blue}{\left(re + 1\right)} + {re}^{2} \cdot 0.5\right) \]
      8. *-commutative53.7%

        \[\leadsto \sin im \cdot \left(\left(re + 1\right) + \color{blue}{0.5 \cdot {re}^{2}}\right) \]
      9. unpow253.7%

        \[\leadsto \sin im \cdot \left(\left(re + 1\right) + 0.5 \cdot \color{blue}{\left(re \cdot re\right)}\right) \]
    4. Simplified53.7%

      \[\leadsto \color{blue}{\sin im \cdot \left(\left(re + 1\right) + 0.5 \cdot \left(re \cdot re\right)\right)} \]
    5. Taylor expanded in re around inf 53.7%

      \[\leadsto \color{blue}{0.5 \cdot \left(\sin im \cdot {re}^{2}\right)} \]
    6. Step-by-step derivation
      1. *-commutative53.7%

        \[\leadsto \color{blue}{\left(\sin im \cdot {re}^{2}\right) \cdot 0.5} \]
      2. unpow253.7%

        \[\leadsto \left(\sin im \cdot \color{blue}{\left(re \cdot re\right)}\right) \cdot 0.5 \]
      3. associate-*r*53.7%

        \[\leadsto \color{blue}{\sin im \cdot \left(\left(re \cdot re\right) \cdot 0.5\right)} \]
      4. associate-*r*53.7%

        \[\leadsto \sin im \cdot \color{blue}{\left(re \cdot \left(re \cdot 0.5\right)\right)} \]
    7. Simplified53.7%

      \[\leadsto \color{blue}{\sin im \cdot \left(re \cdot \left(re \cdot 0.5\right)\right)} \]
    8. Taylor expanded in im around 0 55.4%

      \[\leadsto \color{blue}{0.5 \cdot \left({re}^{2} \cdot im\right)} \]
    9. Step-by-step derivation
      1. associate-*r*55.4%

        \[\leadsto \color{blue}{\left(0.5 \cdot {re}^{2}\right) \cdot im} \]
      2. *-commutative55.4%

        \[\leadsto \color{blue}{\left({re}^{2} \cdot 0.5\right)} \cdot im \]
      3. unpow255.4%

        \[\leadsto \left(\color{blue}{\left(re \cdot re\right)} \cdot 0.5\right) \cdot im \]
      4. associate-*r*55.4%

        \[\leadsto \color{blue}{\left(re \cdot \left(re \cdot 0.5\right)\right)} \cdot im \]
    10. Simplified55.4%

      \[\leadsto \color{blue}{\left(re \cdot \left(re \cdot 0.5\right)\right) \cdot im} \]
  3. Recombined 3 regimes into one program.
  4. Final simplification85.7%

    \[\leadsto \begin{array}{l} \mathbf{if}\;re \leq -54:\\ \;\;\;\;0\\ \mathbf{elif}\;re \leq 14.2:\\ \;\;\;\;\sin im\\ \mathbf{else}:\\ \;\;\;\;im \cdot \left(re \cdot \left(re \cdot 0.5\right)\right)\\ \end{array} \]

Alternative 7: 61.0% accurate, 18.2× speedup?

\[\begin{array}{l} \mathbf{if}\;re \leq -1:\\ \;\;\;\;0\\ \mathbf{elif}\;re \leq 2.7:\\ \;\;\;\;im \cdot \left(re + 1\right)\\ \mathbf{else}:\\ \;\;\;\;im \cdot \left(re \cdot \left(re \cdot 0.5\right)\right)\\ \end{array} \]
Derivation
  1. Split input into 3 regimes
  2. if re < -1

    1. Initial program 100.0%

      \[e^{re} \cdot \sin im \]
    2. Step-by-step derivation
      1. expm1-log1p-u100.0%

        \[\leadsto \color{blue}{\mathsf{expm1}\left(\mathsf{log1p}\left(e^{re} \cdot \sin im\right)\right)} \]
      2. expm1-udef100.0%

        \[\leadsto \color{blue}{e^{\mathsf{log1p}\left(e^{re} \cdot \sin im\right)} - 1} \]
      3. log1p-udef100.0%

        \[\leadsto e^{\color{blue}{\log \left(1 + e^{re} \cdot \sin im\right)}} - 1 \]
      4. add-exp-log100.0%

        \[\leadsto \color{blue}{\left(1 + e^{re} \cdot \sin im\right)} - 1 \]
    3. Applied egg-rr100.0%

      \[\leadsto \color{blue}{\left(1 + e^{re} \cdot \sin im\right) - 1} \]
    4. Taylor expanded in im around 0 100.0%

      \[\leadsto \color{blue}{1} - 1 \]

    if -1 < re < 2.7000000000000002

    1. Initial program 99.9%

      \[e^{re} \cdot \sin im \]
    2. Taylor expanded in re around 0 98.1%

      \[\leadsto \color{blue}{\sin im + \sin im \cdot re} \]
    3. Step-by-step derivation
      1. +-commutative98.1%

        \[\leadsto \color{blue}{\sin im \cdot re + \sin im} \]
      2. *-rgt-identity98.1%

        \[\leadsto \sin im \cdot re + \color{blue}{\sin im \cdot 1} \]
      3. distribute-lft-out98.1%

        \[\leadsto \color{blue}{\sin im \cdot \left(re + 1\right)} \]
    4. Simplified98.1%

      \[\leadsto \color{blue}{\sin im \cdot \left(re + 1\right)} \]
    5. Taylor expanded in im around 0 57.3%

      \[\leadsto \color{blue}{\left(1 + re\right) \cdot im} \]

    if 2.7000000000000002 < re

    1. Initial program 100.0%

      \[e^{re} \cdot \sin im \]
    2. Taylor expanded in re around 0 53.7%

      \[\leadsto \color{blue}{\sin im + \left(\sin im \cdot re + 0.5 \cdot \left(\sin im \cdot {re}^{2}\right)\right)} \]
    3. Step-by-step derivation
      1. *-rgt-identity53.7%

        \[\leadsto \color{blue}{\sin im \cdot 1} + \left(\sin im \cdot re + 0.5 \cdot \left(\sin im \cdot {re}^{2}\right)\right) \]
      2. *-commutative53.7%

        \[\leadsto \sin im \cdot 1 + \left(\sin im \cdot re + \color{blue}{\left(\sin im \cdot {re}^{2}\right) \cdot 0.5}\right) \]
      3. associate-*l*53.7%

        \[\leadsto \sin im \cdot 1 + \left(\sin im \cdot re + \color{blue}{\sin im \cdot \left({re}^{2} \cdot 0.5\right)}\right) \]
      4. distribute-lft-out53.7%

        \[\leadsto \sin im \cdot 1 + \color{blue}{\sin im \cdot \left(re + {re}^{2} \cdot 0.5\right)} \]
      5. distribute-lft-out53.7%

        \[\leadsto \color{blue}{\sin im \cdot \left(1 + \left(re + {re}^{2} \cdot 0.5\right)\right)} \]
      6. associate-+l+53.7%

        \[\leadsto \sin im \cdot \color{blue}{\left(\left(1 + re\right) + {re}^{2} \cdot 0.5\right)} \]
      7. +-commutative53.7%

        \[\leadsto \sin im \cdot \left(\color{blue}{\left(re + 1\right)} + {re}^{2} \cdot 0.5\right) \]
      8. *-commutative53.7%

        \[\leadsto \sin im \cdot \left(\left(re + 1\right) + \color{blue}{0.5 \cdot {re}^{2}}\right) \]
      9. unpow253.7%

        \[\leadsto \sin im \cdot \left(\left(re + 1\right) + 0.5 \cdot \color{blue}{\left(re \cdot re\right)}\right) \]
    4. Simplified53.7%

      \[\leadsto \color{blue}{\sin im \cdot \left(\left(re + 1\right) + 0.5 \cdot \left(re \cdot re\right)\right)} \]
    5. Taylor expanded in re around inf 53.7%

      \[\leadsto \color{blue}{0.5 \cdot \left(\sin im \cdot {re}^{2}\right)} \]
    6. Step-by-step derivation
      1. *-commutative53.7%

        \[\leadsto \color{blue}{\left(\sin im \cdot {re}^{2}\right) \cdot 0.5} \]
      2. unpow253.7%

        \[\leadsto \left(\sin im \cdot \color{blue}{\left(re \cdot re\right)}\right) \cdot 0.5 \]
      3. associate-*r*53.7%

        \[\leadsto \color{blue}{\sin im \cdot \left(\left(re \cdot re\right) \cdot 0.5\right)} \]
      4. associate-*r*53.7%

        \[\leadsto \sin im \cdot \color{blue}{\left(re \cdot \left(re \cdot 0.5\right)\right)} \]
    7. Simplified53.7%

      \[\leadsto \color{blue}{\sin im \cdot \left(re \cdot \left(re \cdot 0.5\right)\right)} \]
    8. Taylor expanded in im around 0 55.4%

      \[\leadsto \color{blue}{0.5 \cdot \left({re}^{2} \cdot im\right)} \]
    9. Step-by-step derivation
      1. associate-*r*55.4%

        \[\leadsto \color{blue}{\left(0.5 \cdot {re}^{2}\right) \cdot im} \]
      2. *-commutative55.4%

        \[\leadsto \color{blue}{\left({re}^{2} \cdot 0.5\right)} \cdot im \]
      3. unpow255.4%

        \[\leadsto \left(\color{blue}{\left(re \cdot re\right)} \cdot 0.5\right) \cdot im \]
      4. associate-*r*55.4%

        \[\leadsto \color{blue}{\left(re \cdot \left(re \cdot 0.5\right)\right)} \cdot im \]
    10. Simplified55.4%

      \[\leadsto \color{blue}{\left(re \cdot \left(re \cdot 0.5\right)\right) \cdot im} \]
  3. Recombined 3 regimes into one program.
  4. Final simplification68.9%

    \[\leadsto \begin{array}{l} \mathbf{if}\;re \leq -1:\\ \;\;\;\;0\\ \mathbf{elif}\;re \leq 2.7:\\ \;\;\;\;im \cdot \left(re + 1\right)\\ \mathbf{else}:\\ \;\;\;\;im \cdot \left(re \cdot \left(re \cdot 0.5\right)\right)\\ \end{array} \]

Alternative 8: 53.1% accurate, 28.5× speedup?

\[\begin{array}{l} \mathbf{if}\;re \leq -66:\\ \;\;\;\;0\\ \mathbf{elif}\;re \leq 1:\\ \;\;\;\;im\\ \mathbf{else}:\\ \;\;\;\;re \cdot im\\ \end{array} \]
Derivation
  1. Split input into 3 regimes
  2. if re < -66

    1. Initial program 100.0%

      \[e^{re} \cdot \sin im \]
    2. Step-by-step derivation
      1. expm1-log1p-u100.0%

        \[\leadsto \color{blue}{\mathsf{expm1}\left(\mathsf{log1p}\left(e^{re} \cdot \sin im\right)\right)} \]
      2. expm1-udef100.0%

        \[\leadsto \color{blue}{e^{\mathsf{log1p}\left(e^{re} \cdot \sin im\right)} - 1} \]
      3. log1p-udef100.0%

        \[\leadsto e^{\color{blue}{\log \left(1 + e^{re} \cdot \sin im\right)}} - 1 \]
      4. add-exp-log100.0%

        \[\leadsto \color{blue}{\left(1 + e^{re} \cdot \sin im\right)} - 1 \]
    3. Applied egg-rr100.0%

      \[\leadsto \color{blue}{\left(1 + e^{re} \cdot \sin im\right) - 1} \]
    4. Taylor expanded in im around 0 100.0%

      \[\leadsto \color{blue}{1} - 1 \]

    if -66 < re < 1

    1. Initial program 99.9%

      \[e^{re} \cdot \sin im \]
    2. Taylor expanded in im around 0 58.4%

      \[\leadsto \color{blue}{e^{re} \cdot im} \]
    3. Taylor expanded in re around 0 56.9%

      \[\leadsto \color{blue}{im} \]

    if 1 < re

    1. Initial program 100.0%

      \[e^{re} \cdot \sin im \]
    2. Taylor expanded in re around 0 4.4%

      \[\leadsto \color{blue}{\sin im + \sin im \cdot re} \]
    3. Step-by-step derivation
      1. +-commutative4.4%

        \[\leadsto \color{blue}{\sin im \cdot re + \sin im} \]
      2. *-rgt-identity4.4%

        \[\leadsto \sin im \cdot re + \color{blue}{\sin im \cdot 1} \]
      3. distribute-lft-out4.4%

        \[\leadsto \color{blue}{\sin im \cdot \left(re + 1\right)} \]
    4. Simplified4.4%

      \[\leadsto \color{blue}{\sin im \cdot \left(re + 1\right)} \]
    5. Taylor expanded in im around 0 18.9%

      \[\leadsto \color{blue}{\left(1 + re\right) \cdot im} \]
    6. Taylor expanded in re around inf 18.9%

      \[\leadsto \color{blue}{re \cdot im} \]
  3. Recombined 3 regimes into one program.
  4. Final simplification58.2%

    \[\leadsto \begin{array}{l} \mathbf{if}\;re \leq -66:\\ \;\;\;\;0\\ \mathbf{elif}\;re \leq 1:\\ \;\;\;\;im\\ \mathbf{else}:\\ \;\;\;\;re \cdot im\\ \end{array} \]

Alternative 9: 53.4% accurate, 28.7× speedup?

\[\begin{array}{l} \mathbf{if}\;re \leq -1:\\ \;\;\;\;0\\ \mathbf{else}:\\ \;\;\;\;im \cdot \left(re + 1\right)\\ \end{array} \]
Derivation
  1. Split input into 2 regimes
  2. if re < -1

    1. Initial program 100.0%

      \[e^{re} \cdot \sin im \]
    2. Step-by-step derivation
      1. expm1-log1p-u100.0%

        \[\leadsto \color{blue}{\mathsf{expm1}\left(\mathsf{log1p}\left(e^{re} \cdot \sin im\right)\right)} \]
      2. expm1-udef100.0%

        \[\leadsto \color{blue}{e^{\mathsf{log1p}\left(e^{re} \cdot \sin im\right)} - 1} \]
      3. log1p-udef100.0%

        \[\leadsto e^{\color{blue}{\log \left(1 + e^{re} \cdot \sin im\right)}} - 1 \]
      4. add-exp-log100.0%

        \[\leadsto \color{blue}{\left(1 + e^{re} \cdot \sin im\right)} - 1 \]
    3. Applied egg-rr100.0%

      \[\leadsto \color{blue}{\left(1 + e^{re} \cdot \sin im\right) - 1} \]
    4. Taylor expanded in im around 0 100.0%

      \[\leadsto \color{blue}{1} - 1 \]

    if -1 < re

    1. Initial program 100.0%

      \[e^{re} \cdot \sin im \]
    2. Taylor expanded in re around 0 60.2%

      \[\leadsto \color{blue}{\sin im + \sin im \cdot re} \]
    3. Step-by-step derivation
      1. +-commutative60.2%

        \[\leadsto \color{blue}{\sin im \cdot re + \sin im} \]
      2. *-rgt-identity60.2%

        \[\leadsto \sin im \cdot re + \color{blue}{\sin im \cdot 1} \]
      3. distribute-lft-out60.2%

        \[\leadsto \color{blue}{\sin im \cdot \left(re + 1\right)} \]
    4. Simplified60.2%

      \[\leadsto \color{blue}{\sin im \cdot \left(re + 1\right)} \]
    5. Taylor expanded in im around 0 41.8%

      \[\leadsto \color{blue}{\left(1 + re\right) \cdot im} \]
  3. Recombined 2 regimes into one program.
  4. Final simplification58.4%

    \[\leadsto \begin{array}{l} \mathbf{if}\;re \leq -1:\\ \;\;\;\;0\\ \mathbf{else}:\\ \;\;\;\;im \cdot \left(re + 1\right)\\ \end{array} \]

Alternative 10: 30.0% accurate, 40.1× speedup?

\[\begin{array}{l} \mathbf{if}\;re \leq 1:\\ \;\;\;\;im\\ \mathbf{else}:\\ \;\;\;\;re \cdot im\\ \end{array} \]
Derivation
  1. Split input into 2 regimes
  2. if re < 1

    1. Initial program 100.0%

      \[e^{re} \cdot \sin im \]
    2. Taylor expanded in im around 0 75.1%

      \[\leadsto \color{blue}{e^{re} \cdot im} \]
    3. Taylor expanded in re around 0 35.7%

      \[\leadsto \color{blue}{im} \]

    if 1 < re

    1. Initial program 100.0%

      \[e^{re} \cdot \sin im \]
    2. Taylor expanded in re around 0 4.4%

      \[\leadsto \color{blue}{\sin im + \sin im \cdot re} \]
    3. Step-by-step derivation
      1. +-commutative4.4%

        \[\leadsto \color{blue}{\sin im \cdot re + \sin im} \]
      2. *-rgt-identity4.4%

        \[\leadsto \sin im \cdot re + \color{blue}{\sin im \cdot 1} \]
      3. distribute-lft-out4.4%

        \[\leadsto \color{blue}{\sin im \cdot \left(re + 1\right)} \]
    4. Simplified4.4%

      \[\leadsto \color{blue}{\sin im \cdot \left(re + 1\right)} \]
    5. Taylor expanded in im around 0 18.9%

      \[\leadsto \color{blue}{\left(1 + re\right) \cdot im} \]
    6. Taylor expanded in re around inf 18.9%

      \[\leadsto \color{blue}{re \cdot im} \]
  3. Recombined 2 regimes into one program.
  4. Final simplification30.8%

    \[\leadsto \begin{array}{l} \mathbf{if}\;re \leq 1:\\ \;\;\;\;im\\ \mathbf{else}:\\ \;\;\;\;re \cdot im\\ \end{array} \]

Alternative 11: 26.4% accurate, 203.0× speedup?

\[im \]
Derivation
  1. Initial program 100.0%

    \[e^{re} \cdot \sin im \]
  2. Taylor expanded in im around 0 77.2%

    \[\leadsto \color{blue}{e^{re} \cdot im} \]
  3. Taylor expanded in re around 0 26.3%

    \[\leadsto \color{blue}{im} \]
  4. Final simplification26.3%

    \[\leadsto im \]

Reproduce

?
herbie shell --seed 2023167 
(FPCore (re im)
  :name "math.exp on complex, imaginary part"
  :precision binary64
  (* (exp re) (sin im)))