# How to define coefficient c in 3 coupling pdes in solving 2D-PDE (PDE toolbox)

1 view (last 30 days)
Yue on 22 Dec 2021
Commented: Yue on 27 Dec 2021
I'm solving 2D-pdes using PDE toolbox, my problem is how to define coefficient c because the third equation (below) is coupled with A and B. I have tried a lot with pde toolbox and refer to this link, but failed to identify c coefficient.
According to this link, I can easily define the first equation and column vector c (first 2 rows), c(1) = c(4) = c, c(2) = c(3) = 0; but I have no idea how to define c in the third equation. Could anybody give me some help?

Ravi Kumar on 22 Dec 2021
If you have Symbolic Math Toolbox, then you can use the pdeCoefficients function to get the requried c-coefficient.
Regards,
Ravi
Yue on 27 Dec 2021
It's useful. Thank you very much!

### Categories

Find more on Eigenvalue Problems in Help Center and File Exchange

### Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by