Solving the following initial and boundary value problem

33 Views Asked by At

I’ve been doing some work on the heat equation recently and I’m having problems with the following equation: $$u_t-\frac{1}{1-t}u_{xx}=0, 0<x<π, t>0$$ with boundary equations: $$u(x,0)=g(x), 0<x<π$$ $$u_x(0,t)=0=u_x(π,t), t \ge 0$$ I know normally I can use separation of variables to solve this. However, I’m unsure as to how to solve this without knowing $g$. Also, I know the Neumann boundary conditions appear periodic, hence my solution must have $\cos(nx)$ in it. However, in all honesty I’m very stuck with this and have been for the past couple hours. How do I go about solving this boundary initial value problem?