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how to input high order derivative when using our own PDEs

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Hi,all:
F is a function of x and y, so in comsol how to input high order derivative?(I want to use my own PDEs) for example, d(F,x) can be used to represent dF/dx, am I right? So, how to express d2F/dx2, d2F/dxdy and even higher order derivative? Is there any document that I can refer to?


0 Replies Last Post 5 août 2016, 01:26 UTC−4
COMSOL Moderator

Hello Lidong Xia

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