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seen Aug 13 at 14:07

Sep
10
awarded  Editor
Sep
10
revised Does $\mathbb{Z}_5(\sqrt[3]{3})$ make sense? Or, can we always extend a field by a root of a reducible polynomial?
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Sep
10
awarded  Supporter
Sep
10
answered Does $\mathbb{Z}_5(\sqrt[3]{3})$ make sense? Or, can we always extend a field by a root of a reducible polynomial?
Sep
8
answered When is the product of $n$ subgroups a subgroup?
Sep
7
comment Acyclic vs Exact
(You mean Brown, right?). No. Here is what he says on page 5: "acyclic, i.e., $H(C)=0$".
Sep
7
comment Acyclic vs Exact
Indeed. You are exonerated! Still, this is not the current terminology. I can offer two points: 1) Cartan and Eilenberg were the pioneers. The followers often figure out that the original terminology is not the best and history takes its course. 2) They (C&E) actually talk about left complexes, which you cannot see in newer texts and they never say exact, which was probably later introduced.
Sep
7
awarded  Teacher
Sep
7
answered Acyclic vs Exact