http://misha-b.livejournal.com/ ([identity profile] misha-b.livejournal.com) wrote in [personal profile] juan_gandhi 2016-10-22 01:33 pm (UTC)

Я понимаю, что вам хотелось что-то вроде {x \in R, x>0}. Но все же не самый плохой ответ.
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