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Re: High-order derivatives
thanks for your reply Is there a way to also look at the third order derivative? I tried diff(utt,t), and got zero, diff(diff(diff(u,t),t),t) did not work either But diff(diff(diff(u^2,t),t),t) did...
View ArticleRe: High-order derivatives
thanks for your reply Is there a way to also look at the third order derivative? I tried diff(utt,t), and got zero, diff(diff(diff(u,t),t),t) did not work either But diff(diff(diff(u^2,t),t),t) did...
View ArticleRe: High-order derivatives
Hi, The "diff" and "pdiff" operators changed name to "d" and "pd", respectively, starting from version 3.5a, so, for example, d(u,x) is now the correct syntax for du/dx. Magnus Ringh COMSOL
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