A ring S is a central extension of a subring JR if 5 = RC and C is the centralizer of R in 5, i.e., C = {s E S sr = rs} for every r E R. We shall also say that R is centrally embedded in S.
No takes yet. Share an insight, caveat, or question.
S. A. Amitsur (1975) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: