Talk:Semigroup with two elements

Left/right zero semigroups are not inverse
Inverse semigroups require each element to have a unique inverse, but all elements of left/right zero semigroups are inverses of each other (i.e. aba = a, bab = b). So, I'm deleting that line, but please revert if I am mistaken. Trevori (talk) 06:58, 26 July 2023 (UTC)

(Z_2,+) and (Z_2,·) are NOT isomorphic
Someone probably made some joke, saying (Z_2,+) and (Z_2,·) are isomorphic. I am not used to editing Wikipedia, so I will leave it to professionals. 45.171.79.159 (talk) 17:55, 11 June 2024 (UTC)