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

Izv. Vyssh. Uchebn. Zaved. Mat., 1974 Number 12, Pages 51–53 (Mi ivm6683)

Brief communications

Projective classification of ruled surfaces, and focal transforms of a surface

R. M. Geidel'man


UDC: 513

Received: 26.03.1973


 English version:
Soviet Mathematics (Izvestiya VUZ. Matematika), 1974, 18:12, 42–44

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© Steklov Math. Inst. of RAS, 2026