I have an integral equation which I solve numerically for the unknown integrand by segmenting it with the trapezoid rule. This will result in a system of non linear equations because of the trigonometric functions present. I solve this system with FindRoot.
My problem is that I believe there are many solutions, and findroot does not pick the right one even after much monkeying with the starting values.
One thing I know about the solution I want is that it is decreasing with increasing independent variable X. Is it possible to impose this condition on the FindRoot command? I think you can do this with Solve, but my system of equations seems to be too large for Solve.
Hope this is clear.. I'm an engineer, not a great programmmer, so by necessity my code is primitive but does seem to solve for certain parameters, just not the ones I really want.
University of Wisconsin