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myers> I'm not sure though how strongly I would push to
myers> have such a concept in the core. I would not argue
myers> against it, since it is useful. If this idea is
myers> absorbed into the groups package, then I would like
myers> to see it modified to accept a number which can be
myers> interpreted as the number molecules in a complex as
myers> described above.

Hi Chris,

Although this is an attractive idea, there is a significant
problem in coming up with a universal way of counting the
entities (or summing the amounts of all the species). Your
example didn't involve a simple sum of X = A + B + C ...,
but multipliers (X = A + 2B ...), which means there must be
a scheme for people to express exactly how they want things
counted up. That in turn means arbitrary formulas. Where
would such formulas go, and how would it differ from using
parameters and assignment rules today? (I'm not being
dismissive here, just trying to think the ideas through.)

MH

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