True. I guess I was putting rationals et al under "unusual requirements". Happy to accept they're not as unusual as I think. Composability is a huge issue: I

True. I guess I was putting rationals et al under "unusual requirements". Happy to accept they're not as unusual as I think. Composability is a huge issue: I think the whole reason SciPy exists is to provide an interoperability standard for this sort of work. That said, I think your average scientist can more intuitively see ways of composing _using_ matrices than the rest of us. (Checks the Sourceforge reviews. ROTFL. What's the purpose of this spam?)