Method on @infsup: X = pownrev (C, X, P)

Method on @infsup: X = pownrev (C, P)

Compute the reverse monomial x^P.

That is, an enclosure of all x ∈ X where pown (x, P) ∈ C.

Accuracy: The result is a valid enclosure. The result is a tight enclosure for P ≥ -2. The result also is a tight enclosure if the reciprocal of P can be computed exactly in double-precision.

See also: @infsup/pown.

Package: interval