Dharmendar Reddy <[email protected]> writes: > Hello, > I need to slove a nonlinear problem : > F(x)= 0 with x = xd specified on the boundary. I have setup an snes based > solver. I need to modify it to handle the situation described below. > > The bc value xd takes a set of values > xd = {x1, x2 ......., xn}, xj > xi for j > i . > > Parametrising xd(t)= x1 + (xn - x1) * t such that by selcting t between 0 > and 1 I get all the xd values mentioned above. > > I want the solver to automatically increase or decrease the t based on > convergence criteria ( i.e., go back to earlier converged step and try > again with a smaller step, ofcourse report divergence if the step size is > smaller than a specified minimum step size) and solve system of equations.
See TSPSEUDO, which uses residual-based step control.
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