Given a set A with a binary associative operation *, I would like to say that for each element a there exist an element a' such that a*a' = k.(adsbygoogle = window.adsbygoogle || []).push({});

Does this concept have a name?

I was very tempted to say that a' is a right inverse for a, but that means that k should then be the identity element, for which a*k=k*a=a holds, which might not be true.

Any ideas?

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# Is there a name for ab=k

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