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1 lugl 852 anni - Трактат «Комментарии к трудным постулатам Евклида» – серьёзный шаг к созданию неевклидовой геометрии (О. Хайям).

Aggiunto al nastro di tempo:

История геометрии 1 часть

4 gen 2019

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828

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1 lugl 852 anni

Adesso

~ 1174 years ago

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