I tried to see the discussion that led to class aliases being rejected
as a proposal, but could not find links on the Wiki. In fact, in Trac
(#101) that proposal is still a 'maybe', but with no updates. Is there
a competing proposal that got accepted?
[Without a mechanism like class aliases, breaking up Num into a
hierarchy of proper mathematical concepts becomes too unwieldly to be
realistic. This is a real stumbling block for anyone trying to use the
class system to encode fine-grained mathematical concepts.]
Jacques
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