Let's have a semigroup(adsbygoogle = window.adsbygoogle || []).push({}); and a proper sub-semigroupSof S.B

If we have also an endomorphism [tex]f:S\rightarrow S[/tex], is it possible that the subset [tex]B'=\{f(b)|b\in B \}[/tex] isnota sub-semigroup anymore?

**Physics Forums | Science Articles, Homework Help, Discussion**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# (sub)semigroup with an endomorphism

**Physics Forums | Science Articles, Homework Help, Discussion**