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June 8th, 2013, 04:09 AM  #1 
Member Joined: Apr 2013 Posts: 42 Thanks: 1  Notations of (partial) derivatives
What is exactly the difference between and . And is the notation the same as the delta or the d notation? For example: and . Is it then true that with the delta notation you only differentiate f with respect to x and with the d notation you have to take in mind that y is also dependent on x? So, and ? And what is in this example? It is not really clear to me.... 
June 8th, 2013, 12:37 PM  #2 
Senior Member Joined: Feb 2013 Posts: 153 Thanks: 0  Re: Notations of (partial) derivatives
We use delta when we have function which depends on more variables, and d when it depends on just one variable. d is total diferential and delta is partial diferential. If function f depends on x and y we have [attachment=0:j2gauz4e]PrtScr capture_4.jpg[/attachment:j2gauz4e].


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