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File talk:Занятие с кандидатом физико-математических наук.jpg

Latest comment: 4 years ago by 1234qwer1234qwer4 in topic Description

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Latest comment: 4 years ago1 comment1 person in discussion

Proof of what? This is the definition of a norm. 1234qwer1234qwer4 (talk) 15:13, 8 December 2019 (UTC)Reply

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