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Dec 24, 2012 at 18:41 vote accept ARupinski
Dec 16, 2011 at 1:44 comment added Benjamin Steinberg I had meant section where I wrote factor. I remembered the term chief factors in Marshall Hall for composition factors and thought that he must use factor for what I would call divisor. A subgroup of a quotient is of course a quotient of a subgroup but the converse is false. If G is a simple group, then it has no subquotients because it has no quotients. But it can have many divisors.
Dec 16, 2011 at 1:33 comment added Tom Goodwillie "Factor group" is an old-fashioned synonym for "quotient group". Subgroups of quotient groups are the same as quotient groups of subgroups. I like to call them subquotients.
Dec 16, 2011 at 1:02 comment added Benjamin Steinberg Steve, thanks! I knew group theorists had another name for it, but I couldn't recall it.
Dec 16, 2011 at 0:44 comment added Steve D I think another common term for "divisor" is "section".
Dec 16, 2011 at 0:33 comment added Benjamin Steinberg The book of Ribes and Zalesskii on profinite groups has information about formations and generalizations, which seems what the question is about.
Dec 16, 2011 at 0:26 history answered Benjamin Steinberg CC BY-SA 3.0