## Documentation Center |

As Systems of PDEs describes,
toolbox functions can address the case of systems of *N* PDEs.
How do you represent the coefficients of your PDE in the correct form?
In general, an elliptic system is

The notation
means the *N*-by-1
matrix with (*i*,1)-component

Other problems with *N* > 1 are the parabolic
system

the hyperbolic system

and the eigenvalue system

To solve a PDE using this toolbox, you convert your problem into one of the forms the toolbox accepts. Then express your problem coefficients in a form the toolbox accepts.

The question is how to express each coefficient: **d**, **c**, **a**, and **f**.
For answers, see f for Systems, c for Systems, and a or d for Systems.

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