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MATHEMATICS
A fixed point principle
A. E. Gel'man A. I. Hertsen Leningrad State Pedagogical Institute
Citation:
A. E. Gel'man, “A fixed point principle”, Dokl. Akad. Nauk SSSR, 198:3 (1971), 506–508
Linking options:
https://www.mathnet.ru/eng/dan36170 https://www.mathnet.ru/eng/dan/v198/i3/p506
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