I have a problem of the form u_xx +a(x)u_x +b(x)u(x-\eta)+c(x)u(x+\gamma)=f(x)
with boundary(interval) conditions u(x)=\phi(x) on -\eta
Roberto Ferretti
Dear Mesfin, to write a code as such, you may construct a standard finite difference scheme, and enforce the condition that x-\eta and x+\gamma are nodes of the discretization, so that u(x-\eta) and u(x+\gamma) correspond to suitable node values. You only need the space step to be a submultiple of both the delays \eta and \gamma.
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