2
votes
1answer
166 views

Fixed-point method in many-dimensions

A well known method of easily solving multi-dimensional non-linear root finding problems, is to bring the equations into the form: $$\bf x = g(x)$$ And then iterating. The problem is, one has to find ...
5
votes
1answer
614 views

spectrum of the “discrete Laplacian operator”

In numerical analysis, the discrete Laplacian operator $\triangle$ on $\ell^2({\bf Z})$ can be written in terms of the shift operator $\triangle=S+S^*-2I$ where $S$ is the right shift operator. ...