This re-instated what passes for faith in humanity

[--Pete]

Hi,

A set is an unordered collection of elements.[right][snapback]98503[/snapback][/right]

Technically, you are right, and we've been guilty of sloppy jargon. However, from context, it should appear that what we are really talking about is a set and an operator on that set that is antisymmetric, transitive and global (I think that that's all that's necessary). It's been too long since I've played with these concepts, so I can no longer remember all the correct jargon, and have no idea whether such a construct is a ring, a field, a groupoid, a semi-group, etc. I do know that it is not a group, because groups and algebras are essential to physics.

--Pete