u\mleft(0,y\mright?=\mleft(\frac{y}{b}\mright?^2,u\mleft(a,y\mright)=1,0<y<b u\mleft(x,0\mright)=\frac{x}{a,}u\mleft(x,b\mright?=1,0<x<a \frac{\partial^2u}{ax^2}+\frac{\partial^2u}{\partial\gamma^2}=0,0<x<a,0<y<b

Fig: 1

Fig: 2

Fig: 3