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Rekha 7: \|birth_place = Basel, [[Switzerland]] \|death_date = {{death date and age\|1783\|9\|18\|1707\|4\|15\|df=y}}<br/><small><nowiki>[</nowiki>OS: 7 September 1783<nowiki>]</nowiki></small> \|death_place = [[St. Petersburg]], [[Russia]] \|residence = [[Germany\|Prussia]], [[Russia]]</br> [[Switzerland]] \|citizenship = Rekha 27: \|signature = Euler's signature.svg }} '''Leonhard Euler''' (pronounced ''Oiler'') ([[15 April]] [[1707]] – [[7 September]] [[1783]]) ek [[Switzerland\|Swiss]] [[mathematician]] aur [[physicist]] rahaa. Uu aapan jindagi ke jaada time [[Russia]] aur [[Germany]] me bitais rahaa. Euler [[calculus]] aur [[topology]] me nawaa chij paais rahaa aur dher sabd banais rahaa jon ki abhi mathematics me kaam me lawa jaae hae. Uu ~~[[function (mathematics)\|~~mathematical function]] ke idea suruu karis rahaa.<ref name="function">{{cite book\| last = Dunham\| first = William\| title = Euler: The Master of Us All\| year = 1999\| publisher =The Mathematical Association of America \| pages = 17}}</ref> Uu [[mechanics]], [[optics]], aur [[astronomy]] me bhi kaam karis rahaa.

Leonhard Euler: ke revisions ke biich ke antar