Talk:Additive inverse
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Untitled
[edit]should read:
- "In mathematics,..."
- ... in an additively noted abelian group ...
- ... opposite of ring elements (matrices, functions, ...)...
- ... if there is a unit element (in K for a K-module), then -x = (-1)·x
Universal construction
[edit]"to do: symmetrization of an abelian semigroup"
-- Moved the above section to this page until it can be completed.