\[{\left(x + 1\right)}^{\left(\frac{1}{3}\right)} - {x}^{\left(\frac{1}{3}\right)}\]
Test:
NMSE problem 3.3.4
Bits:
128 bits
Bits error versus x
Time: 43.2 s
Input Error: 30.4
Output Error: 2.5
Log:
Profile: 🕒
\(\begin{cases} {\left(e^{\frac{1}{3}}\right)}^{\left(\log_* (1 + x)\right)} - {x}^{\left(\frac{1}{3}\right)} & \text{when } x \le 13.5327772596717 \\ \frac{{\left({\left(e^{\frac{1}{3}}\right)}^{\left(\log_* (1 + \frac{-1}{x})\right)}\right)}^3 - \frac{-1}{x}}{(\left({x}^{\left(\frac{1}{3}\right)}\right) * \left(e^{\frac{\log_* (1 + x)}{3}} + {x}^{\left(\frac{1}{3}\right)}\right) + \left({\left(e^{\frac{\log_* (1 + x)}{3}}\right)}^2\right))_*} & \text{otherwise} \end{cases}\)

    if x < 13.5327772596717

    1. Started with
      \[{\left(x + 1\right)}^{\left(\frac{1}{3}\right)} - {x}^{\left(\frac{1}{3}\right)}\]
      0.0
    2. Using strategy rm
      0.0
    3. Applied add-exp-log to get
      \[{\color{red}{\left(x + 1\right)}}^{\left(\frac{1}{3}\right)} - {x}^{\left(\frac{1}{3}\right)} \leadsto {\color{blue}{\left(e^{\log \left(x + 1\right)}\right)}}^{\left(\frac{1}{3}\right)} - {x}^{\left(\frac{1}{3}\right)}\]
      0.0
    4. Applied pow-exp to get
      \[\color{red}{{\left(e^{\log \left(x + 1\right)}\right)}^{\left(\frac{1}{3}\right)}} - {x}^{\left(\frac{1}{3}\right)} \leadsto \color{blue}{e^{\log \left(x + 1\right) \cdot \frac{1}{3}}} - {x}^{\left(\frac{1}{3}\right)}\]
      0.0
    5. Applied simplify to get
      \[e^{\color{red}{\log \left(x + 1\right) \cdot \frac{1}{3}}} - {x}^{\left(\frac{1}{3}\right)} \leadsto e^{\color{blue}{\frac{\log_* (1 + x)}{3}}} - {x}^{\left(\frac{1}{3}\right)}\]
      0.0
    6. Using strategy rm
      0.0
    7. Applied add-cbrt-cube to get
      \[\color{red}{e^{\frac{\log_* (1 + x)}{3}}} - {x}^{\left(\frac{1}{3}\right)} \leadsto \color{blue}{\sqrt[3]{{\left(e^{\frac{\log_* (1 + x)}{3}}\right)}^3}} - {x}^{\left(\frac{1}{3}\right)}\]
      0.1
    8. Applied taylor to get
      \[\sqrt[3]{{\left(e^{\frac{\log_* (1 + x)}{3}}\right)}^3} - {x}^{\left(\frac{1}{3}\right)} \leadsto \sqrt[3]{{\left(e^{\frac{1}{3} \cdot \log_* (1 + x)}\right)}^3} - {x}^{\left(\frac{1}{3}\right)}\]
      0.1
    9. Taylor expanded around 0 to get
      \[\sqrt[3]{{\color{red}{\left(e^{\frac{1}{3} \cdot \log_* (1 + x)}\right)}}^3} - {x}^{\left(\frac{1}{3}\right)} \leadsto \sqrt[3]{{\color{blue}{\left(e^{\frac{1}{3} \cdot \log_* (1 + x)}\right)}}^3} - {x}^{\left(\frac{1}{3}\right)}\]
      0.1
    10. Applied simplify to get
      \[\color{red}{\sqrt[3]{{\left(e^{\frac{1}{3} \cdot \log_* (1 + x)}\right)}^3} - {x}^{\left(\frac{1}{3}\right)}} \leadsto \color{blue}{{\left(e^{\frac{1}{3}}\right)}^{\left(\log_* (1 + x)\right)} - {x}^{\left(\frac{1}{3}\right)}}\]
      0.0

    if 13.5327772596717 < x

    1. Started with
      \[{\left(x + 1\right)}^{\left(\frac{1}{3}\right)} - {x}^{\left(\frac{1}{3}\right)}\]
      59.8
    2. Using strategy rm
      59.8
    3. Applied add-exp-log to get
      \[{\color{red}{\left(x + 1\right)}}^{\left(\frac{1}{3}\right)} - {x}^{\left(\frac{1}{3}\right)} \leadsto {\color{blue}{\left(e^{\log \left(x + 1\right)}\right)}}^{\left(\frac{1}{3}\right)} - {x}^{\left(\frac{1}{3}\right)}\]
      60.3
    4. Applied pow-exp to get
      \[\color{red}{{\left(e^{\log \left(x + 1\right)}\right)}^{\left(\frac{1}{3}\right)}} - {x}^{\left(\frac{1}{3}\right)} \leadsto \color{blue}{e^{\log \left(x + 1\right) \cdot \frac{1}{3}}} - {x}^{\left(\frac{1}{3}\right)}\]
      60.3
    5. Applied simplify to get
      \[e^{\color{red}{\log \left(x + 1\right) \cdot \frac{1}{3}}} - {x}^{\left(\frac{1}{3}\right)} \leadsto e^{\color{blue}{\frac{\log_* (1 + x)}{3}}} - {x}^{\left(\frac{1}{3}\right)}\]
      59.7
    6. Using strategy rm
      59.7
    7. Applied flip3-- to get
      \[\color{red}{e^{\frac{\log_* (1 + x)}{3}} - {x}^{\left(\frac{1}{3}\right)}} \leadsto \color{blue}{\frac{{\left(e^{\frac{\log_* (1 + x)}{3}}\right)}^{3} - {\left({x}^{\left(\frac{1}{3}\right)}\right)}^{3}}{{\left(e^{\frac{\log_* (1 + x)}{3}}\right)}^2 + \left({\left({x}^{\left(\frac{1}{3}\right)}\right)}^2 + e^{\frac{\log_* (1 + x)}{3}} \cdot {x}^{\left(\frac{1}{3}\right)}\right)}}\]
      59.6
    8. Applied simplify to get
      \[\frac{\color{red}{{\left(e^{\frac{\log_* (1 + x)}{3}}\right)}^{3} - {\left({x}^{\left(\frac{1}{3}\right)}\right)}^{3}}}{{\left(e^{\frac{\log_* (1 + x)}{3}}\right)}^2 + \left({\left({x}^{\left(\frac{1}{3}\right)}\right)}^2 + e^{\frac{\log_* (1 + x)}{3}} \cdot {x}^{\left(\frac{1}{3}\right)}\right)} \leadsto \frac{\color{blue}{{\left(e^{\frac{\log_* (1 + x)}{3}}\right)}^3 - {\left({x}^{\left(\frac{1}{3}\right)}\right)}^3}}{{\left(e^{\frac{\log_* (1 + x)}{3}}\right)}^2 + \left({\left({x}^{\left(\frac{1}{3}\right)}\right)}^2 + e^{\frac{\log_* (1 + x)}{3}} \cdot {x}^{\left(\frac{1}{3}\right)}\right)}\]
      59.6
    9. Applied taylor to get
      \[\frac{{\left(e^{\frac{\log_* (1 + x)}{3}}\right)}^3 - {\left({x}^{\left(\frac{1}{3}\right)}\right)}^3}{{\left(e^{\frac{\log_* (1 + x)}{3}}\right)}^2 + \left({\left({x}^{\left(\frac{1}{3}\right)}\right)}^2 + e^{\frac{\log_* (1 + x)}{3}} \cdot {x}^{\left(\frac{1}{3}\right)}\right)} \leadsto \frac{{\left(e^{\frac{1}{3} \cdot \log_* (1 + \frac{-1}{x})}\right)}^3 - {\left({\left(\frac{-1}{x}\right)}^{\frac{1}{3}}\right)}^3}{{\left(e^{\frac{\log_* (1 + x)}{3}}\right)}^2 + \left({\left({x}^{\left(\frac{1}{3}\right)}\right)}^2 + e^{\frac{\log_* (1 + x)}{3}} \cdot {x}^{\left(\frac{1}{3}\right)}\right)}\]
      62.4
    10. Taylor expanded around -inf to get
      \[\frac{\color{red}{{\left(e^{\frac{1}{3} \cdot \log_* (1 + \frac{-1}{x})}\right)}^3 - {\left({\left(\frac{-1}{x}\right)}^{\frac{1}{3}}\right)}^3}}{{\left(e^{\frac{\log_* (1 + x)}{3}}\right)}^2 + \left({\left({x}^{\left(\frac{1}{3}\right)}\right)}^2 + e^{\frac{\log_* (1 + x)}{3}} \cdot {x}^{\left(\frac{1}{3}\right)}\right)} \leadsto \frac{\color{blue}{{\left(e^{\frac{1}{3} \cdot \log_* (1 + \frac{-1}{x})}\right)}^3 - {\left({\left(\frac{-1}{x}\right)}^{\frac{1}{3}}\right)}^3}}{{\left(e^{\frac{\log_* (1 + x)}{3}}\right)}^2 + \left({\left({x}^{\left(\frac{1}{3}\right)}\right)}^2 + e^{\frac{\log_* (1 + x)}{3}} \cdot {x}^{\left(\frac{1}{3}\right)}\right)}\]
      62.4
    11. Applied simplify to get
      \[\frac{{\left(e^{\frac{1}{3} \cdot \log_* (1 + \frac{-1}{x})}\right)}^3 - {\left({\left(\frac{-1}{x}\right)}^{\frac{1}{3}}\right)}^3}{{\left(e^{\frac{\log_* (1 + x)}{3}}\right)}^2 + \left({\left({x}^{\left(\frac{1}{3}\right)}\right)}^2 + e^{\frac{\log_* (1 + x)}{3}} \cdot {x}^{\left(\frac{1}{3}\right)}\right)} \leadsto \frac{{\left({\left(e^{\frac{1}{3}}\right)}^{\left(\log_* (1 + \frac{-1}{x})\right)}\right)}^3 - \frac{-1}{x}}{(\left({x}^{\left(\frac{1}{3}\right)}\right) * \left(e^{\frac{\log_* (1 + x)}{3}} + {x}^{\left(\frac{1}{3}\right)}\right) + \left({\left(e^{\frac{\log_* (1 + x)}{3}}\right)}^2\right))_*}\]
      4.9

    12. Applied final simplification

  1. Removed slow pow expressions

Original test:


(lambda ((x default))
  #:name "NMSE problem 3.3.4"
  (- (pow (+ x 1) (/ 1 3)) (pow x (/ 1 3))))