I have the following diffusion problem form "Mathcad for Engineers" Adidharma et al. I have worked through several ODE examples successfully, however when working through the attached worksheet I receive the following errors, worksheet is attached. I have the following questions:
1)When setting up the function the derivative notation of d/dx or d/dt is allowed is this also allowed in the PDE solver?
2)In the book on Mathcad online it mentions that PDE Boundary Conditions are required to use "CRT F7" to setup a derivative, however when I do this I still have an error?
3)The online book also mentions that boundary conditions need to have literal subscripts using ".", I have tried entering the function "f" and then the literal subscipt "." followed by "x" however, this did not work?
Please advise what I am doing wrong. I have Mathcad version14. Thank you in advance.
Sincerely,
Walter