Gersh Shpraihler wrote:
>
> > protivorechie, baten'ka. Kakovo zhe togda konkretno chetkoe
> > razgranichenie, koli mnozhestva-to peresekajutsja?
>
> ya by prislal kartinku iz uchebnika. No ne znau kak.
> Tam i granicy , i peresechenie.
>
> Oni zhe ne sovpadaut , a tolko peresekautsya.
ja ponimaju, matematiku ja uchil, i ne tolko v shkole, no kak by i v
drugih zavedenijah.
v ljubom sluchae, u kazhdogo iz etih mnozhestv dolzhny byt' svoi
granitzy, kotorye ty pochemu-to ignoriruesh'. hotja, vprochem, hren s
nimi.
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