Thanks. Will do. On Apr 3, 12:19 pm, Alec Mihailovs <[email protected]> wrote: > On Apr 3, 2:32 pm, pallab <[email protected]> wrote: > > > Is there any way to check whether a symbolic expression is a > > derivative. Like, > > > isinstance(diff(f(x),x),"what to put?") > > > gives "True" > > > and > > > isinstance(f(x),"what to put?") > > > gives false, assuming f is not a derivative itself. > > One can do the following, for example, > > def is_diff(expr): > try: > return isinstance(expr.operator(), > sage.symbolic.operators.FDerivativeOperator) > except (AttributeError): > return False > > Alec Mihailovs
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