(log (cosh x))

Average Error: 30.5 → 30.5

Time: 6.6s

Precision: binary64

• could not determine a ground truth for program body

  1. x = 2.7279434923395366e+116

Math

\[\log \left(\cosh x\right)\]

↓

\[\log \left(\cosh x\right)\]

C

double code(double x) {
	return ((double) log(((double) cosh(x))));
}

↓

double code(double x) {
	return ((double) log(((double) cosh(x))));
}

Error

Bits error versus x

Derivation

1. Initial program 30.5

   \[\log \left(\cosh x\right)\]

2. Final simplification 30.5

   \[\leadsto \log \left(\cosh x\right)\]

Reproduce

herbie shell --seed 2020153 
(FPCore (x)
  :name "(log (cosh x))"
  :precision binary64
  (log (cosh x)))