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Top Questions
7
votes
How to show that $\mathbb{R}$ in the language of rings does not admit quantifier elimination?
logic
model-theory
quantifier-elimination
asked Jan 14, 2021 at 14:28
math.stackexchange.com
7
votes
Help with proof of noncompact Poincaré Duality by Hatcher.
algebraic-topology
proof-explanation
homology-cohomology
poincare-duality
asked May 25, 2021 at 15:52
math.stackexchange.com
6
votes
Proof of acyclic models theorem in Vick's Introduction to Algebraic Topology
category-theory
homological-algebra
asked Mar 10, 2021 at 16:33
math.stackexchange.com
5
votes
Why does a compact set contain open with compact closure with extra condition on homology as in the book by Vick?
algebraic-topology
proof-explanation
homology-cohomology
asked May 18, 2021 at 11:12
math.stackexchange.com
Top Answers
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