Average Error: 30.8 → 0.3
Time: 46.8s
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

Try it out

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 clear-num0.6

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

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

    \[\leadsto \frac{1}{\frac{\log 10}{\color{blue}{\log \left(\sqrt{re^2 + im^2}^*\right)}}}\]
  8. Using strategy rm
  9. Applied *-un-lft-identity0.6

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

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

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

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

    \[\leadsto \color{blue}{\frac{\frac{1}{\frac{\sqrt{\log 10}}{1}}}{\sqrt{\log 10}} \cdot \log \left(\sqrt{re^2 + im^2}^*\right)}\]
  15. 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: 46.8s)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)))