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June 8th, 2013, 03:09 AM   #1
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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....
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June 8th, 2013, 11:37 AM   #2
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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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