Schepv трисв трискв L8i8, Ukraine

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MechMat of Moscow State University, lecture on math. analysis, our lecturer was Taras Pavlovich
Lukashenko. And here, proving some theorem, he decided instead(//tractor-service.com)
"segment from a to b" consider the interval, that is, the same points from a to b, but the ends are not included. He expressed it in words
- Well, now I will throw away the ends,

... and looked at us suspiciously for a long time, чего это мы хохочем.