From: Leonardo B. Lopes <leo@iems.nwu.edu>

Date: Mon, 15 Oct 2001 22:01:49 -0500 (CDT)

To: William Arthur Naylor <bill@scl.csd.uwo.ca>

cc: www-math@w3c.org, www-math@w3.org

Message-ID: <Pine.GSO.4.04.10110151156430.12239-100000@gomory.iems.nwu.edu>

Date: Mon, 15 Oct 2001 22:01:49 -0500 (CDT)

To: William Arthur Naylor <bill@scl.csd.uwo.ca>

cc: www-math@w3c.org, www-math@w3.org

Message-ID: <Pine.GSO.4.04.10110151156430.12239-100000@gomory.iems.nwu.edu>

Thanks again, Bill. Thanks for the example and the context. How 'bout this: Probably the least intrusive way of expressing sparse matrices using MathML constructs would be to represent each column (or row) vector as an ordered pair of vectors, the first containing the indexes of the nonzeroes, and the second containing the values. Any glaring faults with that idea? The idea of a matrix being a vector of order pairs of vectors is a little more confusing than necessary, but if they are buried deeply enough in a library, that should be fine. Do you have an opinion on that? Thanks! Leo. ======================================================================== Leonardo B. Lopes leo@iems.nwu.edu Ph.D. Student (847)491-8470 IEMS - Northwestern University http://www.iems.nwu.edu/~leoReceived on Monday, 15 October 2001 23:02:02 UTC

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