On Thursday, August 29, 2019 at 2:18:30 PM UTC-5, Carl Eberhart wrote: > > derivative treats all parameters in the definition of a function as > constant. Suppose some of them are themselves unknown functions of the > variable. > I would like a procedure Derivative which accepts a list of these > parameters and returns an appropriate expression. > For example, if f(t)=a(t)*b(t)*c where a and b are unknown functions of > t, I want Derivative(f(t),t,[a,b]) to return (da(t)*b(t)+a(t)*db(t))*c > I have tried various things using the existing derivative procedure, but > nothing that works > Any suggestions would be welcome. > Thanks > > *Thanks to Aaron Tresam and Harald Schilly for the rapid response, and > simple solution.* >
-- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/62302b76-59e2-4cdf-8080-4c8d67c4039f%40googlegroups.com.
