👉 In mathematics, a reciproque is a binary operation on a set of elements. It's defined as follows:
1. For every two elements x and y in the set, if there exists an element z such that (x
z) = y, then x
z = y.
This operation is used in many areas of mathematics, including group theory, algebraic topology, and combinatorics.
Reciproque also appears in the context of reciprocity laws, which relate the parity of