On Tue, Dec 18, 2007 at 03:02:12PM -0700, Dave Steffen wrote:
On Tuesday 18 December 2007, Martin Bonner wrote:
From: Andreas Harnack
If you think that this doesn't belong to the standard, then please allow me to ask one question: Why is there a complex number class in the standard and what does it actually do?
There is rather less discussion about possible interfaces for complex numbers than for matrices. (The last time I used matrices in my code, I wanted A=B*C to mean A[i,j] = B[i,j]*C[i,j].)
Interesting: that's a direct product, which we hardly ever use.
I don't think that's a direct product; c.f. http://mathworld.wolfram.com/MatrixDirectProduct.html Wikipedia suggests it's called the Hadamard (or Schur or entrywise) product; c.f. http://en.wikipedia.org/wiki/Matrix_multiplication Yours pedantically, -Steve