The \( (\sim)\)-good congruences on normal ortho-u-monoids. (Chinese. English summary) Zbl 1438.20058
Summary: \( (\sim)\)-good congruences on normal ortho-u-monoids are characterized by means of \( (\sim)\)-good congruence pairs. The results about congruences on normal orthogroups in regular semigroups are generalized to \( (\sim)\)-semiabundant semigroups.