Average Error: 0.0 → 0.0
Time: 16.5s
Precision: 64
Internal Precision: 320
\[\frac{2}{e^{x} + e^{-x}}\]
↓
\[\log_* (1 + (e^{\frac{2}{e^{x} + e^{-x}}} - 1)^*)\]

Error

Bits error versus x

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Your Program's Arguments

Results

Enter valid numbers for all inputs

Derivation

  1. Initial program 0.0

    \[\frac{2}{e^{x} + e^{-x}}\]
  2. Using strategy rm

  3. Applied log1p-expm1-u0.0

    \[\leadsto \color{blue}{\log_* (1 + (e^{\frac{2}{e^{x} + e^{-x}}} - 1)^*)}\]

Runtime

Time bar (total: 16.5s)Debug logProfile

herbie shell --seed 2018167 +o rules:numerics
(FPCore (x)
  :name "Hyperbolic secant"
  (/ 2 (+ (exp x) (exp (- x)))))