Weak inverse
In mathematics, the term weak inverse is used with several meanings. == Theory of semigroups == In the theory of semigroups, a weak inverse of an element x in a semigroup (S, •) is an element y such that y • x • y = y.
In mathematics, the term weak inverse is used with several meanings. == Theory of semigroups == In the theory of semigroups, a weak inverse of an element x in a semigroup (S, •) is an element y such that y • x • y = y.
In mathematics, the term weak inverse is used with several meanings. == Theory of semigroups == In the theory of semigroups, a weak inverse of an element x in a semigroup (S, •) is an element y such that y • x • y = y.
Source: Wikipedia "Weak inverse" · CC BY-SA 4.0
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