\[\frac{\log \left(\sqrt{re \cdot re + im \cdot im}\right)}{\log 10}\]
Test:
math.log10 on complex, real part
Bits:
128 bits
Bits error versus re
Bits error versus im
Time: 14.5 s
Input Error: 31.0
Output Error: 14.4
Log:
Profile: 🕒
\(\begin{cases} \sqrt[3]{\frac{{\left(\log \left(\sqrt[3]{-re}\right)\right)}^3}{{\left(\frac{\log 10}{3}\right)}^3}} & \text{when } re \le -1.4799672839841313 \cdot 10^{+124} \\ \frac{3}{\frac{\log 10}{\log \left(\sqrt[3]{\sqrt{{re}^2 + im \cdot im}}\right)}} & \text{when } re \le 3.751610550051807 \cdot 10^{+91} \\ \frac{\log \left(\sqrt[3]{re}\right)}{\frac{\log 10}{3}} & \text{otherwise} \end{cases}\)

    if re < -1.4799672839841313e+124

    1. Started with
      \[\frac{\log \left(\sqrt{re \cdot re + im \cdot im}\right)}{\log 10}\]
      54.2
    2. Applied simplify to get
      \[\color{red}{\frac{\log \left(\sqrt{re \cdot re + im \cdot im}\right)}{\log 10}} \leadsto \color{blue}{\frac{\log \left(\sqrt{{re}^2 + im \cdot im}\right)}{\log 10}}\]
      54.2
    3. Using strategy rm
      54.2
    4. Applied add-cube-cbrt to get
      \[\frac{\log \color{red}{\left(\sqrt{{re}^2 + im \cdot im}\right)}}{\log 10} \leadsto \frac{\log \color{blue}{\left({\left(\sqrt[3]{\sqrt{{re}^2 + im \cdot im}}\right)}^3\right)}}{\log 10}\]
      54.2
    5. Using strategy rm
      54.2
    6. Applied *-un-lft-identity to get
      \[\frac{\log \left({\left(\sqrt[3]{\sqrt{{re}^2 + im \cdot im}}\right)}^3\right)}{\color{red}{\log 10}} \leadsto \frac{\log \left({\left(\sqrt[3]{\sqrt{{re}^2 + im \cdot im}}\right)}^3\right)}{\color{blue}{1 \cdot \log 10}}\]
      54.2
    7. Applied pow3 to get
      \[\frac{\log \color{red}{\left({\left(\sqrt[3]{\sqrt{{re}^2 + im \cdot im}}\right)}^3\right)}}{1 \cdot \log 10} \leadsto \frac{\log \color{blue}{\left({\left(\sqrt[3]{\sqrt{{re}^2 + im \cdot im}}\right)}^{3}\right)}}{1 \cdot \log 10}\]
      54.2
    8. Applied log-pow to get
      \[\frac{\color{red}{\log \left({\left(\sqrt[3]{\sqrt{{re}^2 + im \cdot im}}\right)}^{3}\right)}}{1 \cdot \log 10} \leadsto \frac{\color{blue}{3 \cdot \log \left(\sqrt[3]{\sqrt{{re}^2 + im \cdot im}}\right)}}{1 \cdot \log 10}\]
      54.2
    9. Applied times-frac to get
      \[\color{red}{\frac{3 \cdot \log \left(\sqrt[3]{\sqrt{{re}^2 + im \cdot im}}\right)}{1 \cdot \log 10}} \leadsto \color{blue}{\frac{3}{1} \cdot \frac{\log \left(\sqrt[3]{\sqrt{{re}^2 + im \cdot im}}\right)}{\log 10}}\]
      54.2
    10. Using strategy rm
      54.2
    11. Applied add-cbrt-cube to get
      \[\frac{3}{1} \cdot \color{red}{\frac{\log \left(\sqrt[3]{\sqrt{{re}^2 + im \cdot im}}\right)}{\log 10}} \leadsto \frac{3}{1} \cdot \color{blue}{\sqrt[3]{{\left(\frac{\log \left(\sqrt[3]{\sqrt{{re}^2 + im \cdot im}}\right)}{\log 10}\right)}^3}}\]
      54.2
    12. Applied add-cbrt-cube to get
      \[\color{red}{\frac{3}{1}} \cdot \sqrt[3]{{\left(\frac{\log \left(\sqrt[3]{\sqrt{{re}^2 + im \cdot im}}\right)}{\log 10}\right)}^3} \leadsto \color{blue}{\sqrt[3]{{\left(\frac{3}{1}\right)}^3}} \cdot \sqrt[3]{{\left(\frac{\log \left(\sqrt[3]{\sqrt{{re}^2 + im \cdot im}}\right)}{\log 10}\right)}^3}\]
      54.2
    13. Applied cbrt-unprod to get
      \[\color{red}{\sqrt[3]{{\left(\frac{3}{1}\right)}^3} \cdot \sqrt[3]{{\left(\frac{\log \left(\sqrt[3]{\sqrt{{re}^2 + im \cdot im}}\right)}{\log 10}\right)}^3}} \leadsto \color{blue}{\sqrt[3]{{\left(\frac{3}{1}\right)}^3 \cdot {\left(\frac{\log \left(\sqrt[3]{\sqrt{{re}^2 + im \cdot im}}\right)}{\log 10}\right)}^3}}\]
      54.2
    14. Applied taylor to get
      \[\sqrt[3]{{\left(\frac{3}{1}\right)}^3 \cdot {\left(\frac{\log \left(\sqrt[3]{\sqrt{{re}^2 + im \cdot im}}\right)}{\log 10}\right)}^3} \leadsto \sqrt[3]{{\left(\frac{3}{1}\right)}^3 \cdot {\left(\frac{\log \left(\sqrt[3]{-1 \cdot re}\right)}{\log 10}\right)}^3}\]
      0.7
    15. Taylor expanded around -inf to get
      \[\sqrt[3]{{\left(\frac{3}{1}\right)}^3 \cdot {\left(\frac{\log \left(\sqrt[3]{\color{red}{-1 \cdot re}}\right)}{\log 10}\right)}^3} \leadsto \sqrt[3]{{\left(\frac{3}{1}\right)}^3 \cdot {\left(\frac{\log \left(\sqrt[3]{\color{blue}{-1 \cdot re}}\right)}{\log 10}\right)}^3}\]
      0.7
    16. Applied simplify to get
      \[\sqrt[3]{{\left(\frac{3}{1}\right)}^3 \cdot {\left(\frac{\log \left(\sqrt[3]{-1 \cdot re}\right)}{\log 10}\right)}^3} \leadsto \sqrt[3]{{\left(\frac{\log \left(\sqrt[3]{-re}\right)}{\log 10}\right)}^3 \cdot \frac{{3}^3}{1}}\]
      0.7

    17. Applied final simplification
    18. Applied simplify to get
      \[\color{red}{\sqrt[3]{{\left(\frac{\log \left(\sqrt[3]{-re}\right)}{\log 10}\right)}^3 \cdot \frac{{3}^3}{1}}} \leadsto \color{blue}{\sqrt[3]{\frac{{\left(\log \left(\sqrt[3]{-re}\right)\right)}^3}{{\left(\frac{\log 10}{3}\right)}^3}}}\]
      0.7

    if -1.4799672839841313e+124 < re < 3.751610550051807e+91

    1. Started with
      \[\frac{\log \left(\sqrt{re \cdot re + im \cdot im}\right)}{\log 10}\]
      21.0
    2. Applied simplify to get
      \[\color{red}{\frac{\log \left(\sqrt{re \cdot re + im \cdot im}\right)}{\log 10}} \leadsto \color{blue}{\frac{\log \left(\sqrt{{re}^2 + im \cdot im}\right)}{\log 10}}\]
      21.0
    3. Using strategy rm
      21.0
    4. Applied add-cube-cbrt to get
      \[\frac{\log \color{red}{\left(\sqrt{{re}^2 + im \cdot im}\right)}}{\log 10} \leadsto \frac{\log \color{blue}{\left({\left(\sqrt[3]{\sqrt{{re}^2 + im \cdot im}}\right)}^3\right)}}{\log 10}\]
      21.0
    5. Using strategy rm
      21.0
    6. Applied pow3 to get
      \[\frac{\log \color{red}{\left({\left(\sqrt[3]{\sqrt{{re}^2 + im \cdot im}}\right)}^3\right)}}{\log 10} \leadsto \frac{\log \color{blue}{\left({\left(\sqrt[3]{\sqrt{{re}^2 + im \cdot im}}\right)}^{3}\right)}}{\log 10}\]
      21.0
    7. Applied log-pow to get
      \[\frac{\color{red}{\log \left({\left(\sqrt[3]{\sqrt{{re}^2 + im \cdot im}}\right)}^{3}\right)}}{\log 10} \leadsto \frac{\color{blue}{3 \cdot \log \left(\sqrt[3]{\sqrt{{re}^2 + im \cdot im}}\right)}}{\log 10}\]
      21.0
    8. Applied associate-/l* to get
      \[\color{red}{\frac{3 \cdot \log \left(\sqrt[3]{\sqrt{{re}^2 + im \cdot im}}\right)}{\log 10}} \leadsto \color{blue}{\frac{3}{\frac{\log 10}{\log \left(\sqrt[3]{\sqrt{{re}^2 + im \cdot im}}\right)}}}\]
      21.0

    if 3.751610550051807e+91 < re

    1. Started with
      \[\frac{\log \left(\sqrt{re \cdot re + im \cdot im}\right)}{\log 10}\]
      50.1
    2. Applied simplify to get
      \[\color{red}{\frac{\log \left(\sqrt{re \cdot re + im \cdot im}\right)}{\log 10}} \leadsto \color{blue}{\frac{\log \left(\sqrt{{re}^2 + im \cdot im}\right)}{\log 10}}\]
      50.1
    3. Using strategy rm
      50.1
    4. Applied add-cube-cbrt to get
      \[\frac{\log \color{red}{\left(\sqrt{{re}^2 + im \cdot im}\right)}}{\log 10} \leadsto \frac{\log \color{blue}{\left({\left(\sqrt[3]{\sqrt{{re}^2 + im \cdot im}}\right)}^3\right)}}{\log 10}\]
      50.1
    5. Using strategy rm
      50.1
    6. Applied *-un-lft-identity to get
      \[\frac{\log \left({\left(\sqrt[3]{\sqrt{{re}^2 + im \cdot im}}\right)}^3\right)}{\color{red}{\log 10}} \leadsto \frac{\log \left({\left(\sqrt[3]{\sqrt{{re}^2 + im \cdot im}}\right)}^3\right)}{\color{blue}{1 \cdot \log 10}}\]
      50.1
    7. Applied pow3 to get
      \[\frac{\log \color{red}{\left({\left(\sqrt[3]{\sqrt{{re}^2 + im \cdot im}}\right)}^3\right)}}{1 \cdot \log 10} \leadsto \frac{\log \color{blue}{\left({\left(\sqrt[3]{\sqrt{{re}^2 + im \cdot im}}\right)}^{3}\right)}}{1 \cdot \log 10}\]
      50.1
    8. Applied log-pow to get
      \[\frac{\color{red}{\log \left({\left(\sqrt[3]{\sqrt{{re}^2 + im \cdot im}}\right)}^{3}\right)}}{1 \cdot \log 10} \leadsto \frac{\color{blue}{3 \cdot \log \left(\sqrt[3]{\sqrt{{re}^2 + im \cdot im}}\right)}}{1 \cdot \log 10}\]
      50.1
    9. Applied times-frac to get
      \[\color{red}{\frac{3 \cdot \log \left(\sqrt[3]{\sqrt{{re}^2 + im \cdot im}}\right)}{1 \cdot \log 10}} \leadsto \color{blue}{\frac{3}{1} \cdot \frac{\log \left(\sqrt[3]{\sqrt{{re}^2 + im \cdot im}}\right)}{\log 10}}\]
      50.1
    10. Applied taylor to get
      \[\frac{3}{1} \cdot \frac{\log \left(\sqrt[3]{\sqrt{{re}^2 + im \cdot im}}\right)}{\log 10} \leadsto \frac{3}{1} \cdot \frac{\log \left(\sqrt[3]{re}\right)}{\log 10}\]
      0.6
    11. Taylor expanded around inf to get
      \[\frac{3}{1} \cdot \frac{\log \left(\sqrt[3]{\color{red}{re}}\right)}{\log 10} \leadsto \frac{3}{1} \cdot \frac{\log \left(\sqrt[3]{\color{blue}{re}}\right)}{\log 10}\]
      0.6
    12. Applied simplify to get
      \[\color{red}{\frac{3}{1} \cdot \frac{\log \left(\sqrt[3]{re}\right)}{\log 10}} \leadsto \color{blue}{\frac{\log \left(\sqrt[3]{re}\right)}{\frac{\log 10}{3}}}\]
      0.6

  1. 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)))