find the differential order of an ODE
name; the independent variable
name; the dependent variable
When called with the single argument expr, DifferentialOrder(expr) returns the differential order of the highest derivative found in expr.
When called with a second argument x which is a name, DifferentialOrder(expr, x) returns the differential order of the highest derivative of a function with respect to the variable x that is found in expr.
Finally, when called with a second argument y(x) which is a function of a single argument, DifferentialOrder(expr, y(x)) returns the differential order of the highest derivative of y(x) with respect to x that is found in expr.
ode1 ≔ ⅆ2ⅆt2⁢y⁡t+z⁡t+1+z⁡t2⁢t−1⁢ⅆⅆt⁢z⁡t=ⅆ3ⅆx3⁢f⁡x
The Student[ODEs][DifferentialOrder] command was introduced in Maple 2021.
For more information on Maple 2021 changes, see Updates in Maple 2021.
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