**System of PDE's Satisfied by **

We compute a system of PDE's for

`> `

by first computing an ODE with respect to the variable
using
__gfun[holexprtodiffeq]__
,
and next considering symmetries of
to derive a complete system.

`> `
**holexprtodiffeq(f,y(x));**

`> `
**deq:=op(remove(type,",equation)):**

`> `

`> `

`> `

`> `
**sys2:={""","","}:**