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5 dic 60 anni - 60 г. – Гемин оспаривает пятый постулат Евклида о параллельных прямых – одна из первых попыток создать альтернативную геометрию.

Aggiunto al nastro di tempo:

История геометрии 1 часть

4 gen 2019

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5 dic 60 anni

Adesso

~ 1966 years ago

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