Average Error: 30.8 → 0.3
Time: 46.1s
Precision: 64
Internal Precision: 128
\[\frac{\log \left(\sqrt{re \cdot re + im \cdot im}\right)}{\log 10}\]
\[\log \left(\sqrt{re^2 + im^2}^*\right) \cdot \frac{\frac{1}{\sqrt{\log 10}}}{\sqrt{\log 10}}\]

Error

Bits error versus re

Bits error versus im

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Your Program's Arguments

Results

Enter valid numbers for all inputs

Derivation

  1. Initial program 30.8

    \[\frac{\log \left(\sqrt{re \cdot re + im \cdot im}\right)}{\log 10}\]
  2. Initial simplification0.6

    \[\leadsto \frac{\log \left(\sqrt{re^2 + im^2}^*\right)}{\log 10}\]
  3. Using strategy rm
  4. Applied pow10.6

    \[\leadsto \frac{\log \color{blue}{\left({\left(\sqrt{re^2 + im^2}^*\right)}^{1}\right)}}{\log 10}\]
  5. Applied log-pow0.6

    \[\leadsto \frac{\color{blue}{1 \cdot \log \left(\sqrt{re^2 + im^2}^*\right)}}{\log 10}\]
  6. Applied associate-/l*0.6

    \[\leadsto \color{blue}{\frac{1}{\frac{\log 10}{\log \left(\sqrt{re^2 + im^2}^*\right)}}}\]
  7. Using strategy rm
  8. Applied add-exp-log0.6

    \[\leadsto \frac{1}{\frac{\log 10}{\log \color{blue}{\left(e^{\log \left(\sqrt{re^2 + im^2}^*\right)}\right)}}}\]
  9. Applied rem-log-exp0.6

    \[\leadsto \frac{1}{\frac{\log 10}{\color{blue}{\log \left(\sqrt{re^2 + im^2}^*\right)}}}\]
  10. Using strategy rm
  11. Applied pow10.6

    \[\leadsto \frac{1}{\frac{\log 10}{\log \color{blue}{\left({\left(\sqrt{re^2 + im^2}^*\right)}^{1}\right)}}}\]
  12. Applied log-pow0.6

    \[\leadsto \frac{1}{\frac{\log 10}{\color{blue}{1 \cdot \log \left(\sqrt{re^2 + im^2}^*\right)}}}\]
  13. Applied add-sqr-sqrt0.6

    \[\leadsto \frac{1}{\frac{\color{blue}{\sqrt{\log 10} \cdot \sqrt{\log 10}}}{1 \cdot \log \left(\sqrt{re^2 + im^2}^*\right)}}\]
  14. Applied times-frac0.8

    \[\leadsto \frac{1}{\color{blue}{\frac{\sqrt{\log 10}}{1} \cdot \frac{\sqrt{\log 10}}{\log \left(\sqrt{re^2 + im^2}^*\right)}}}\]
  15. Applied associate-/r*0.6

    \[\leadsto \color{blue}{\frac{\frac{1}{\frac{\sqrt{\log 10}}{1}}}{\frac{\sqrt{\log 10}}{\log \left(\sqrt{re^2 + im^2}^*\right)}}}\]
  16. Using strategy rm
  17. Applied associate-/r/0.3

    \[\leadsto \color{blue}{\frac{\frac{1}{\frac{\sqrt{\log 10}}{1}}}{\sqrt{\log 10}} \cdot \log \left(\sqrt{re^2 + im^2}^*\right)}\]
  18. Final simplification0.3

    \[\leadsto \log \left(\sqrt{re^2 + im^2}^*\right) \cdot \frac{\frac{1}{\sqrt{\log 10}}}{\sqrt{\log 10}}\]

Runtime

Time bar (total: 46.1s)Debug logProfile

herbie shell --seed 2018277 +o rules:numerics
(FPCore (re im)
  :name "math.log10 on complex, real part"
  (/ (log (sqrt (+ (* re re) (* im im)))) (log 10)))