verse

n 1: literature in metrical form [syn: {poetry}, {poesy}]

2: a piece of poetry [syn: {rhyme}]

3: a line of metrical text [syn: {verse line}]

v : compose verses; put into verse [syn: {versify}, {poetize}]

inverse

Given a {function}, f : D -> C, a function g : C

-> D is called a left inverse for f if for all d in D, g (f d)

◦ d and a right inverse if, for all c in C, f (g c) ◦ c and an

inverse if both conditions hold. Only an {injection} has a

left inverse, only a {surjection} has a right inverse and only

a {bijection} has inverses. The inverse of f is often written

as f with a -1 superscript.

(1996-03-12)