1. Semiregularity of congruences implies congruence modularity at 0 Creator: Chajda, Ivan Format: bez média and svazek Type: model:article and TEXT Subject: regularity, modularity, semiregularity, and modularity at 0 Language: English Description: We introduce a weakened form of regularity, the so called semiregularity, and we show that if every diagonal subalgebra of $\mathcal A \times \mathcal A$ is semiregular then $\mathcal A$ is congruence modular at 0. Rights: http://creativecommons.org/publicdomain/mark/1.0/ and policy:public