Browsing Matematik Bölümü Makale Koleksiyonu by Author "Ayık, Gonca"
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Semigroup presentation for congruences on groups
Ayık, Gonca; Çalışkan, Basri (KOREAN MATHEMATICAL SOC, 2013)We consider a congruence rho on a group G as a subsemigroup of the direct product G x G. It is well known that a relation rho on G is a congruence if and only if there exists a normal subgroup N of G such that rho = {(s, ...