Leonhard Euler jee

 http://en.wikipedia.org/wiki/Leonhard_Euler

http://pronouncemath.blogspot.in/2013/04/leonhard-euler-pronunciation.html

*A Tribute to Euler ji
https://www.youtube.com/watch?v=fEWj93XjON0

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http://archive.org/details/KA-converted-mgNtPOgFje0

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img. src.
http://www.cap.ca/wyp/media/theStarEquations/equation5.jpg


yours Eulerly,
sai bbhai.