[Google Doodle] 數學界的莎士比亞 - 瑞士數學大師 尤拉 Leonhard Euler 306歲誕辰
A 1753 portrait by Emanuel
Leonhard Euler (Mathematiker), Briefmarke 1950 http://www.briefmarken-bilder.de/ddr-briefmarken-1950/leonhard-euler-mathematiker
File:Euler-10 Swiss Franc banknote (front).jpg - Wikimedia Commons https://commons.wikimedia.org/wiki/File:Euler-10_Swiss_Franc_banknote_(front).jpg
File:Euler-USSR-1957-stamp.jpg - Wikimedia Commons http://commons.wikimedia.org/wiki/File:Euler-USSR-1957-stamp.jpg
Engraved Portrait by T. Cook after E. Handmann. , Leonard Euler - Books Manuscripts & Prints - Jeremy Norman & Co., Inc. http://www.jnorman.com/cgi-bin/hss/41711
Euler (projet) http://tp.nexgate.ch/vbs_gfx/euler/
雲端JUNIORS: 奧妙的尤拉圖 http://bonjuniors.blogspot.tw/2012/09/blog-post_4.html
Smithsonian Libraries: Happy 302nd to Leonhard Euler! http://smithsonianlibraries.si.edu/smithsonianlibraries/2009/04/happy-302nd-to-leonhard-euler.html
Google Doodle Did it Again! Leonhard Euler | Haus of Hamed http://www.doodlecollect.com/leonhard-euler-5652
Euler 2007 http://www.euler-2007.ch/bilder.htm
Portrait by Johann Georg Brucker (1756)
Vollständige Anleitung zur Algebra | Leonhard EULER | SOPHIA ∑ RARE BOOKS http://www.sophiararebooks.com/pages/books/3056/leonhard-euler/vollstandige-anleitung-zur-algebra
Leonhard Euler - Wikipedia, the free encyclopedia http://en.wikipedia.org/wiki/Leonhard_Euler
萊昂哈德·尤拉 - 維基百科,自由的百科全書 http://zh.wikipedia.org/wiki/%E8%90%8A%E6%98%82%E5%93%88%E5%BE%B7%C2%B7%E6%AD%90%E6%8B%89
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