Özel Arama

Nasir eddin tusi 1201*1274

Nasır eddin al tusi astromer to hulago khan grandson of the conquerorgenghis khan and brother of kublai khan , was a famos scholary in asronomy ,mathematics and geometry.

the observatory establıshed by him was peerless inthat time which was equipped with most modern and excellent devices of that time  some of these tools was invented by himself

He also estabiıshed a library consisting of 400.000 volumes of books.

in geometry he continued efforts on prove the parallel postulate of euclıd.

He rearranged and made proof of it.His proof depends on the following hypothesis.