Seeing my last message convinced me I should send a URL, because my message doesn't seem readable.
http://home.comcast.net/~paul.l.jackson/PLJsAPL/H9Answers.txt Paul On Mon, Jun 18, 2012 at 4:11 PM, Roger Hui <rogerhui.can...@gmail.com> wrote: > Do not be alarmed! :-) The Hilbert matrix is notoriously ill-conditioned > and attempts to invert it does go very bad very fast. This is not due to > any deficiency in the algorithm or implementation but to the fact that > 64-bit floats do not have sufficient precision to represent the answer. > > http://en.wikipedia.org/wiki/Hilbert_matrix > http://www.jsoftware.com/papers/APLQA.htm#Hilbert_matrix ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
