Wednesday, 27 November 2019

Definition of ordinary differential equation

Is a differential equation ordinary if it only contains derivatives with respect to one variable, even if the function has multiple variables?



For example the function y=f(x,t) and the differential equation
d2ydx2+2dydx=4 would that be ordinary are partial?




Does the question not make sense because if you already know how many (independent) variables the function (in this case y) depends on, then it wouldn't be a differential equation because the function isn't unknown?

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