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How Euler Did It: Mixed Partial Derivatives

Euler was the first person to recognize that mixed second partial derivatives are equal (in general) -- except that he discussed differentials instead. This site is one of Ed Sandifer's columns, How Euler Did It from May, 2004.
Identifier: 
http://www.maa.org/editorial/euler/How%20Euler%20Did%20It%2007%20Mixed%20Partial%20Derivatives.pdf
Rating: 
Average: 2.9 (319 votes)
Creator(s): 
Ed Sandifer
Cataloger: 
Lang Moore
Publisher: 
Mathematical Association of America
Rights: 
Copyright ©2004 Ed Sandifer
Format Other: 
Webpage