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Question: How to tell Maple to give the highest order of derivative of a variable in an expression?

Question:How to tell Maple to give the highest order of derivative of a variable in an expression?

AmirHosein Sadeghimanesh 225 Maple 2018
derivative pdetools difforder
June 11 2019
0

Assume we have an expression in several variables, x,y,z,..., where all of them are function of one parameter, t, for an example consider the following simple expression;

f := 2*y(t)*(diff(x(t), t))^2+3*(diff(x(t), t$3))-3*x(t)*(diff(y(t), t));

Is there any command or a way to ask Maple to give the highest order of derivation of x or y with respect to t in the expression? For example in the above example, the answer for x is 3 and for y is 1. If we remove the second term, then the answer for x should be 1.
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