This article is cited in 4 papers

On congruences in closed post classes

V. V. Gorlov

M. V. Lomonosov Moscow State University

Abstract: It is shown herein that on almost all closed Post classes only trivial congruences are possible. Closed Post classes having nontrivial congruences are indicated, and all congruences of these classes are described. For kge3 closed classes having an infinity of congruences are indicated.

UDC: 519.9

Received: 07.07.1972

 English version: Mathematical Notes, 1973, 13:5, 434–438

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