apfelmus wrote:
Hugh Perkins wrote:
Arguably there are two possible implementations, one that enforces
one-to-one mapping, and one which allows multiple values, in either
direction.
Terminology reminder :)
- the latter is called "(binary) relation"
http://en.wikipedia.org/wiki/Binary_relation
- the former would be a "bijection"
http://en.wikipedia.org/wiki/Bijective_map
Following a great tradition,
"That's just semantics."
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