(/ (- 1) (* x x))

Average Error: 0.5 → 0.5

Time: 511.0ms

Precision: binary64

Math

\[\frac{-1}{x \cdot x}\]

↓

\[\frac{-1}{x \cdot x}\]

Error

Bits error versus x

Derivation

1. Initial program 0.5

   \[\frac{-1}{x \cdot x}\]

2. Final simplification 0.5

   \[\leadsto \frac{-1}{x \cdot x}\]

Reproduce

herbie shell --seed 2020153 
(FPCore (x)
  :name "(/ (- 1) (* x x))"
  :precision binary64
  (/ (neg 1.0) (* x x)))