Congruences on regular semigroups

F Pastijn, M Petrich - Transactions of the American Mathematical Society, 1986 - ams.org
Let $ S $ be a regular semigroup and let $\rho $ be a congruence relation on $ S $. The
kernel of $\rho $, in notation $\ker\rho $, is the union of the idempotent $\rho $-classes. The …

[PDF][PDF] CONGRUENCES ON REGULAR SEMIGROUPS

F PASTIJN, M PETRICH - AMERICAN MATHEMATICAL …, 1986 - scholar.archive.org
Let S be a regular semigroup and let p be a congruence relation on S. The kernel of p, in
notation kerp, is the union of the idempotent p-classes. The trace of p, in notation trp, is the …

Congruences on Regular Semigroups

F Pastijn, M Petrich - Transactions of the American Mathematical Society, 1986 - JSTOR
Let S be a regular semigroup and let ρ be a congruence relation on S. The kernel of ρ, in
notation, is the union of the idempotent ρ-classes. The trace of ρ, in notation tr ρ, is the …