The simplest example of the change being sought is a greek letter, typed in as plaintext nu, and its may be replaced by the symbol, ν: expr = 3nu*kx*ky+ ...
I'm trying to set up a system of differential equations for passing to NDSolve. Note that my initial conditions are vector valued so Mathematica should know that ...
How can I force Mathematica to calculate symbolically the partial derivative of a function u[x,y] with respect to a variable ...
Maple can separate and eliminate a function in a system of PDE equations, with casesplit in the PDEtools package. How to do ...