2. Let R be a ring and a be a fixed element of R. Let Sa = {x E Rlax = 0}. Show that Sa is a subring of R.
Posted: Tue Jul 12, 2022 12:39 pm
2. Let R be a ring and a be a fixed element of R. Let Sa = {x E Rlax = 0}. Show that Sa is a subring of R.