Ondrej Certik wrote:
Generally, I think it's a very good idea, when you (or we) implement something and you are sure that it works perfectly (which - at least for me - takes some time playing with the problem to be sure that what I get is correct), to write a test testing the correct result immediatelly. Because once we test it, we can forget about it, as it will always work.
Sure. In those rare cases when one knows that a result is correct...
btw. the figures with eigensolutions of your equation would be a nice addition to the Examples wiki!