Z. I. Kozlova, “<nobr>$Z_N$</nobr>-classification, and approximation of sets”, Izv. Vyssh. Uchebn. Zaved. Mat., 1972, Number 8,Pages <nobr>60

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

Izv. Vyssh. Uchebn. Zaved. Mat., 1972 Number 8, Pages 60–69 (Mi ivm4097)

$Z_N$-classification, and approximation of sets

Z. I. Kozlova

Volgograd

UDC: 519.52

Received: 06.04.1970

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