\[\left(\left(N + 1\right) \cdot \log \left(N + 1\right) - N \cdot \log N\right) - 1\]
Test:
NMSE example 3.8
Bits:
128 bits
Bits error versus N
Time: 37.5 s
Input Error: 31.0
Output Error: 29.4
Log:
Profile: 🕒
\(e^{\log \left(\frac{\log \left(N + 1\right)}{\frac{1}{N + 1}} - \log N \cdot N\right)} - 1\)
  1. Started with
    \[\left(\left(N + 1\right) \cdot \log \left(N + 1\right) - N \cdot \log N\right) - 1\]
    31.0
  2. Using strategy rm
    31.0
  3. Applied flip-+ to get
    \[\left(\color{red}{\left(N + 1\right)} \cdot \log \left(N + 1\right) - N \cdot \log N\right) - 1 \leadsto \left(\color{blue}{\frac{{N}^2 - {1}^2}{N - 1}} \cdot \log \left(N + 1\right) - N \cdot \log N\right) - 1\]
    30.1
  4. Applied associate-*l/ to get
    \[\left(\color{red}{\frac{{N}^2 - {1}^2}{N - 1} \cdot \log \left(N + 1\right)} - N \cdot \log N\right) - 1 \leadsto \left(\color{blue}{\frac{\left({N}^2 - {1}^2\right) \cdot \log \left(N + 1\right)}{N - 1}} - N \cdot \log N\right) - 1\]
    29.9
  5. Applied simplify to get
    \[\left(\frac{\color{red}{\left({N}^2 - {1}^2\right) \cdot \log \left(N + 1\right)}}{N - 1} - N \cdot \log N\right) - 1 \leadsto \left(\frac{\color{blue}{\left({N}^2 - 1\right) \cdot \log \left(N + 1\right)}}{N - 1} - N \cdot \log N\right) - 1\]
    29.9
  6. Using strategy rm
    29.9
  7. Applied add-sqr-sqrt to get
    \[\left(\frac{\left({N}^2 - 1\right) \cdot \log \left(N + 1\right)}{\color{red}{N - 1}} - N \cdot \log N\right) - 1 \leadsto \left(\frac{\left({N}^2 - 1\right) \cdot \log \left(N + 1\right)}{\color{blue}{{\left(\sqrt{N - 1}\right)}^2}} - N \cdot \log N\right) - 1\]
    29.9
  8. Applied add-sqr-sqrt to get
    \[\left(\frac{\left({N}^2 - 1\right) \cdot \color{red}{\log \left(N + 1\right)}}{{\left(\sqrt{N - 1}\right)}^2} - N \cdot \log N\right) - 1 \leadsto \left(\frac{\left({N}^2 - 1\right) \cdot \color{blue}{{\left(\sqrt{\log \left(N + 1\right)}\right)}^2}}{{\left(\sqrt{N - 1}\right)}^2} - N \cdot \log N\right) - 1\]
    29.9
  9. Applied add-sqr-sqrt to get
    \[\left(\frac{\color{red}{\left({N}^2 - 1\right)} \cdot {\left(\sqrt{\log \left(N + 1\right)}\right)}^2}{{\left(\sqrt{N - 1}\right)}^2} - N \cdot \log N\right) - 1 \leadsto \left(\frac{\color{blue}{{\left(\sqrt{{N}^2 - 1}\right)}^2} \cdot {\left(\sqrt{\log \left(N + 1\right)}\right)}^2}{{\left(\sqrt{N - 1}\right)}^2} - N \cdot \log N\right) - 1\]
    29.9
  10. Applied square-unprod to get
    \[\left(\frac{\color{red}{{\left(\sqrt{{N}^2 - 1}\right)}^2 \cdot {\left(\sqrt{\log \left(N + 1\right)}\right)}^2}}{{\left(\sqrt{N - 1}\right)}^2} - N \cdot \log N\right) - 1 \leadsto \left(\frac{\color{blue}{{\left(\sqrt{{N}^2 - 1} \cdot \sqrt{\log \left(N + 1\right)}\right)}^2}}{{\left(\sqrt{N - 1}\right)}^2} - N \cdot \log N\right) - 1\]
    29.9
  11. Applied square-undiv to get
    \[\left(\color{red}{\frac{{\left(\sqrt{{N}^2 - 1} \cdot \sqrt{\log \left(N + 1\right)}\right)}^2}{{\left(\sqrt{N - 1}\right)}^2}} - N \cdot \log N\right) - 1 \leadsto \left(\color{blue}{{\left(\frac{\sqrt{{N}^2 - 1} \cdot \sqrt{\log \left(N + 1\right)}}{\sqrt{N - 1}}\right)}^2} - N \cdot \log N\right) - 1\]
    29.9
  12. Using strategy rm
    29.9
  13. Applied add-exp-log to get
    \[\color{red}{\left({\left(\frac{\sqrt{{N}^2 - 1} \cdot \sqrt{\log \left(N + 1\right)}}{\sqrt{N - 1}}\right)}^2 - N \cdot \log N\right)} - 1 \leadsto \color{blue}{e^{\log \left({\left(\frac{\sqrt{{N}^2 - 1} \cdot \sqrt{\log \left(N + 1\right)}}{\sqrt{N - 1}}\right)}^2 - N \cdot \log N\right)}} - 1\]
    29.8
  14. Applied simplify to get
    \[e^{\color{red}{\log \left({\left(\frac{\sqrt{{N}^2 - 1} \cdot \sqrt{\log \left(N + 1\right)}}{\sqrt{N - 1}}\right)}^2 - N \cdot \log N\right)}} - 1 \leadsto e^{\color{blue}{\log \left(\frac{\log \left(N + 1\right)}{1 \cdot \frac{1}{N + 1}} - \log N \cdot N\right)}} - 1\]
    29.4
  15. Applied simplify to get
    \[e^{\log \color{red}{\left(\frac{\log \left(N + 1\right)}{1 \cdot \frac{1}{N + 1}} - \log N \cdot N\right)}} - 1 \leadsto e^{\log \color{blue}{\left(\frac{\log \left(N + 1\right)}{\frac{1}{N + 1}} - \log N \cdot N\right)}} - 1\]
    29.4

Original test:


(lambda ((N default))
  #:name "NMSE example 3.8"
  (- (- (* (+ N 1) (log (+ N 1))) (* N (log N))) 1)
  #:target
  (- (log (+ N 1)) (- (/ 1 (* 2 N)) (- (/ 1 (* 3 (sqr N))) (/ 4 (pow N 3))))))