Long Multiplication is not commutative.

David C. Ullrich ullrich at math.okstate.edu
Fri Apr 7 12:16:41 EDT 2000

Christian Tismer wrote:

> Yikes!
> No, it is computatively commutative, just not in terms
> of computation time. :-))
> [...]
> Swapping the multiplicands would be a 5 line patch.
> Should I submit it?

    My vote would be yes - long multiplication is slow enough
that it's hard to see why anyone would object to the tiny slowdown
in the case where the swap is not needed. (Hard for _me_ to see,
anyway, which proves very little...)

    (I've noticed the same phenomenon in my silly little "numeric"
types - always assumed it was fixed long ago in grownup types.)

> ciao - chris
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