\[\frac{\log \left(\sqrt{re \cdot re + im \cdot im}\right)}{\log 10}\]
Test:
math.log10 on complex, real part
Bits:
128 bits
Bits error versus re
Bits error versus im
Time: 4.2 s
Input Error: 30.8
Output Error: 0.6
Log: ⚲
Profile: 🕒
\(\frac{3}{\frac{\log 10}{\log \left(\sqrt[3]{\sqrt{im^2 + re^2}^*}\right)}}\)
  1. Started with
    \[\frac{\log \left(\sqrt{re \cdot re + im \cdot im}\right)}{\log 10}\]
    30.8
  2. Applied simplify to get
    \[\color{red}{\frac{\log \left(\sqrt{re \cdot re + im \cdot im}\right)}{\log 10}} \leadsto \color{blue}{\frac{\log \left(\sqrt{im^2 + re^2}^*\right)}{\log 10}}\]
    0.6
  3. Using strategy rm
    0.6
  4. Applied add-cube-cbrt to get
    \[\frac{\log \color{red}{\left(\sqrt{im^2 + re^2}^*\right)}}{\log 10} \leadsto \frac{\log \color{blue}{\left({\left(\sqrt[3]{\sqrt{im^2 + re^2}^*}\right)}^3\right)}}{\log 10}\]
    0.6
  5. Using strategy rm
    0.6
  6. Applied pow3 to get
    \[\frac{\log \color{red}{\left({\left(\sqrt[3]{\sqrt{im^2 + re^2}^*}\right)}^3\right)}}{\log 10} \leadsto \frac{\log \color{blue}{\left({\left(\sqrt[3]{\sqrt{im^2 + re^2}^*}\right)}^{3}\right)}}{\log 10}\]
    0.6
  7. Applied log-pow to get
    \[\frac{\color{red}{\log \left({\left(\sqrt[3]{\sqrt{im^2 + re^2}^*}\right)}^{3}\right)}}{\log 10} \leadsto \frac{\color{blue}{3 \cdot \log \left(\sqrt[3]{\sqrt{im^2 + re^2}^*}\right)}}{\log 10}\]
    0.6
  8. Applied associate-/l* to get
    \[\color{red}{\frac{3 \cdot \log \left(\sqrt[3]{\sqrt{im^2 + re^2}^*}\right)}{\log 10}} \leadsto \color{blue}{\frac{3}{\frac{\log 10}{\log \left(\sqrt[3]{\sqrt{im^2 + re^2}^*}\right)}}}\]
    0.6
  9. Removed slow pow expressions

Original test:


(lambda ((re default) (im default))
  #:name "math.log10 on complex, real part"
  (/ (log (sqrt (+ (* re re) (* im im)))) (log 10)))