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JOURNALS // Izvestiya Vysshikh Uchebnykh Zavedenii. Matematika // Archive

Izv. Vyssh. Uchebn. Zaved. Mat., 1981 Number 3, Pages 80–81 (Mi ivm4705)

Brief communications

The groupoid of prevarieties of semigroups with a zero

L. M. Martynov

Omsk

UDC: 512.53

Received: 15.09.1980



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