Partial differential equation
Explain the steps on how to solve the problem below:
dφ/dτ+ dφ/dχ +dφ/dε+1=0
Boundary conditions:
φ as a f(χ,ε,0)=0
φ as a f(0,ε,τ)=1
φ as a f(χ,0,τ)=1
Solve the PDE..... solution and explanation would be fine Any method to solving the solution would be fine.