Question: Result from pdsolve

Hi,

I'm trying to find my way around using pdsolve. The problem I have now is how to handle the result it return me. From the psdolve help page, for example, we have the following equation returned (eq. 1.2) :

f(x, y) = _F1(x^2+y^2)

I'm not sure that I understand this formulation and how to work with. How can I go from this equation to an equation with integration constant as build in not working ? How can I evaluate or manipulate this type of equation. For instance, how can I retreive the x^2+y^2 part of this expression ?

Thanks,

Jeff

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