http://lily-13.livejournal.com/ ([identity profile] lily-13.livejournal.com) wrote in [personal profile] annasm 2011-03-13 11:49 am (UTC)

О, вспомнилось, как вчера от студентов требовали на экзамене "необходимое и достаточное условие" чего-то там. До них не дошло, что это две разные теоремы. :) А у тебя 2 в одном. :))
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