Is there a name for a set together with a unary operation?
If so, where can I learn more about them? Is there anything interesting about them? Are they simply a special case of groups? It simply occurred to me and Googling around has failed me.
Is there a name for a set together with a unary operation?
If so, where can I learn more about them? Is there anything interesting about them? Are they simply a special case of groups? It simply occurred to me and Googling around has failed me.