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From: Brooks Moses <bmoses-nospam@cits1.stanford.edu>
Newsgroups: comp.lang.ada,comp.lang.fortran
Subject: Re: Ada vs Fortran for scientific applications
Date: Tue, 23 May 2006 10:24:19 -0700
Organization: Stanford University
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Date: 2006-05-23T10:24:19-07:00
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Rich Townsend wrote:
> Gareth Owen wrote:
>>I think assuming anything about A*B is extremely dangerous.  Just of
>>the top of my head, Ada and Matlab think it means matrix
>>multiplication and Fortran and Mathematica think its pointwise
>>multiplication.
>>
>>It means basically nothing in C, and in C++ it means whatever the
>>matrix class implementor wanted it to mean.
> 
> My stance on A*B is this: if A*B denotes matrix multiplication, then A/B should 
> denote matrix 'division': B^-1*A. Which means you need to standardize matrix 
> inversion/linear-equations solution into the language. Which is batshit crazy.

I believe that's how Matlab does it.

Then again, for Matlab's purposes, standardizing matrix inversion and 
linear-equation solution into the language is entirely reasonable.

- Brooks


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