Re: Generalized Eigenvector and Singular Value Decompositions
- To: mathgroup at christensen.cybernetics.net
- Subject: [mg323] Re: [mg304] Generalized Eigenvector and Singular Value Decompositions
- From: Richard Mercer <richard at rmercer.wright.edu>
- Date: Mon, 12 Dec 1994 15:34:47 -0500
> These numbers are consistent with watch timings. Since > I occasionally am working with sequences of 500+ > complex-valued matrices, we can start to get up into > semi-serious amounts of time on my NeXTstation (running > Mma 2.2). > > To some extent, this problem is consistent with my > perceived bias of Mma towards real arithmetic in both > numerical and symbolic computations. IMHO, a factor of > 80 penalty in working with complex-valued rather than > real-valued data is not a good thing. > Mark, My apologies. I completely overlooked the possibility you might be considering complex matrices. (This from someone who did his thesis on mathematical quantum mechanics, where the matrices are almost always complex!) Richard Mercer