\[\left(\frac{\pi}{2} \cdot \frac{1}{{b}^2 - {a}^2}\right) \cdot \left(\frac{1}{a} - \frac{1}{b}\right)\]
Test:
NMSE Section 6.1 mentioned, B
Bits:
128 bits
Bits error versus a
Bits error versus b
Time: 12.2 s
Input Error: 14.7
Output Error: 0.3
Log:
Profile: 🕒
\((\left(\frac{-\frac{1}{2}}{b + a}\right) * \left(\frac{\frac{\pi}{b}}{b - a}\right) + \left(\frac{\frac{\pi}{b + a}}{\left(a \cdot 2\right) \cdot \left(b - a\right)}\right))_*\)
  1. Started with
    \[\left(\frac{\pi}{2} \cdot \frac{1}{{b}^2 - {a}^2}\right) \cdot \left(\frac{1}{a} - \frac{1}{b}\right)\]
    14.7
  2. Using strategy rm
    14.7
  3. Applied sub-neg to get
    \[\left(\frac{\pi}{2} \cdot \frac{1}{{b}^2 - {a}^2}\right) \cdot \color{red}{\left(\frac{1}{a} - \frac{1}{b}\right)} \leadsto \left(\frac{\pi}{2} \cdot \frac{1}{{b}^2 - {a}^2}\right) \cdot \color{blue}{\left(\frac{1}{a} + \left(-\frac{1}{b}\right)\right)}\]
    14.7
  4. Applied distribute-lft-in to get
    \[\color{red}{\left(\frac{\pi}{2} \cdot \frac{1}{{b}^2 - {a}^2}\right) \cdot \left(\frac{1}{a} + \left(-\frac{1}{b}\right)\right)} \leadsto \color{blue}{\left(\frac{\pi}{2} \cdot \frac{1}{{b}^2 - {a}^2}\right) \cdot \frac{1}{a} + \left(\frac{\pi}{2} \cdot \frac{1}{{b}^2 - {a}^2}\right) \cdot \left(-\frac{1}{b}\right)}\]
    14.7
  5. Applied simplify to get
    \[\color{red}{\left(\frac{\pi}{2} \cdot \frac{1}{{b}^2 - {a}^2}\right) \cdot \frac{1}{a}} + \left(\frac{\pi}{2} \cdot \frac{1}{{b}^2 - {a}^2}\right) \cdot \left(-\frac{1}{b}\right) \leadsto \color{blue}{\frac{\frac{\frac{\pi}{2}}{b + a}}{\left(b - a\right) \cdot a}} + \left(\frac{\pi}{2} \cdot \frac{1}{{b}^2 - {a}^2}\right) \cdot \left(-\frac{1}{b}\right)\]
    10.0
  6. Applied simplify to get
    \[\frac{\frac{\frac{\pi}{2}}{b + a}}{\left(b - a\right) \cdot a} + \color{red}{\left(\frac{\pi}{2} \cdot \frac{1}{{b}^2 - {a}^2}\right) \cdot \left(-\frac{1}{b}\right)} \leadsto \frac{\frac{\frac{\pi}{2}}{b + a}}{\left(b - a\right) \cdot a} + \color{blue}{\left(-\frac{\frac{\frac{\pi}{2}}{b}}{\left(b - a\right) \cdot \left(b + a\right)}\right)}\]
    5.1
  7. Applied taylor to get
    \[\frac{\frac{\frac{\pi}{2}}{b + a}}{\left(b - a\right) \cdot a} + \left(-\frac{\frac{\frac{\pi}{2}}{b}}{\left(b - a\right) \cdot \left(b + a\right)}\right) \leadsto \frac{\frac{\frac{\pi}{2}}{b + a}}{\left(b - a\right) \cdot a} + \left(-\frac{\frac{1}{2} \cdot \frac{\pi}{b}}{\left(b - a\right) \cdot \left(b + a\right)}\right)\]
    5.1
  8. Taylor expanded around 0 to get
    \[\frac{\frac{\frac{\pi}{2}}{b + a}}{\left(b - a\right) \cdot a} + \left(-\frac{\color{red}{\frac{1}{2} \cdot \frac{\pi}{b}}}{\left(b - a\right) \cdot \left(b + a\right)}\right) \leadsto \frac{\frac{\frac{\pi}{2}}{b + a}}{\left(b - a\right) \cdot a} + \left(-\frac{\color{blue}{\frac{1}{2} \cdot \frac{\pi}{b}}}{\left(b - a\right) \cdot \left(b + a\right)}\right)\]
    5.1
  9. Applied simplify to get
    \[\frac{\frac{\frac{\pi}{2}}{b + a}}{\left(b - a\right) \cdot a} + \left(-\frac{\frac{1}{2} \cdot \frac{\pi}{b}}{\left(b - a\right) \cdot \left(b + a\right)}\right) \leadsto \frac{\frac{\pi}{b}}{b - a} \cdot \frac{-\frac{1}{2}}{a + b} + \frac{\frac{\frac{\pi}{2}}{a + b}}{\left(b - a\right) \cdot a}\]
    0.3

  10. Applied final simplification
  11. Applied simplify to get
    \[\color{red}{\frac{\frac{\pi}{b}}{b - a} \cdot \frac{-\frac{1}{2}}{a + b} + \frac{\frac{\frac{\pi}{2}}{a + b}}{\left(b - a\right) \cdot a}} \leadsto \color{blue}{(\left(\frac{-\frac{1}{2}}{b + a}\right) * \left(\frac{\frac{\pi}{b}}{b - a}\right) + \left(\frac{\frac{\pi}{b + a}}{\left(a \cdot 2\right) \cdot \left(b - a\right)}\right))_*}\]
    0.3

Original test:


(lambda ((a default) (b default))
  #:name "NMSE Section 6.1 mentioned, B"
  (* (* (/ PI 2) (/ 1 (- (sqr b) (sqr a)))) (- (/ 1 a) (/ 1 b))))