Compute exp (X) - 1 accurately in the neighborhood of zero.
exp (X) - 1
Accuracy: The result is a tight enclosure.
expm1 (infsup (eps)) ⇒ ans ⊂ [2.2204e-16, 2.2205e-16]
See also: @infsup/exp, @infsup/log1p.
Package: interval