If the derivative of an analytic function f is 0, does that mean that the partial derivative of f with respect to x=0 and the partial derivative of f with respect to y=0? And conversely, suppose I know the partial derivates of a function are both equal to 0, can I then assume that the derivative of the function is 0?
If the derivative of an analytic function f is 0, does that mean that the partial derivative of f with respect to x=0 and the partial derivative of f with respect to y=0? And conversely, suppose I know the partial derivates of a function are both equal to 0, can I then assume that the derivative of the function is 0?
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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If the derivative of an analytic function f is 0, does that mean that the partial derivative of f with respect to x=0 and the partial derivative of f with respect to y=0?
And conversely, suppose I know the partial derivates of a function are both equal to 0, can I then assume that the derivative of the function is 0?
Hope this makes sense.
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