http://ok-66.livejournal.com/ ([identity profile] ok-66.livejournal.com) wrote in [personal profile] ivanov_petrov 2013-09-18 02:26 am (UTC)

Т.е. то, что прибавив к натуральному числу единицу, мы получим следующее натуральное число, на веру принимать нельзя?
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