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Diffstat (limited to 'src/pkg/math/atanh.go')
| -rw-r--r-- | src/pkg/math/atanh.go | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/src/pkg/math/atanh.go b/src/pkg/math/atanh.go index ed38fcac6..e150673c7 100644 --- a/src/pkg/math/atanh.go +++ b/src/pkg/math/atanh.go @@ -39,9 +39,10 @@ package math // Atanh(x) calculates the inverse hyperbolic tangent of x. // // Special cases are: -// Atanh(x) = NaN if x < -1 or x > 1 // Atanh(1) = +Inf +// Atanh(±0) = ±0 // Atanh(-1) = -Inf +// Atanh(x) = NaN if x < -1 or x > 1 // Atanh(NaN) = NaN func Atanh(x float64) float64 { const NearZero = 1.0 / (1 << 28) // 2**-28 |