301

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A form of Lefschetz duality
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Homotopy equivalence of certain kinds of adjunction spaces
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Classify matrices up to similarity over arbitrary (commutative) ring.
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No injective groups with more than one element?
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free complex with mod-p coefficients
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$n$-path-connected components of a variety
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Orientation and generalized cohomology theories
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Algebras with a degenerate trace form
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$G$-bundles on affine spaces
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James Construction for Disconnected Spaces
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Equivalence of cosimplicial models for homotopy pullbacks
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In which commutative algebras does any derivation possess a flow?
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Subposets of small Dushnik-Miller dimension
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Is the complement of a strong deformation retract of a manifold M homotopic equivalent with the boundary of M?
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An obstruction theory for promoting homotopy equivalences that are equivariant maps to equivariant homotopy equivalences?
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Why is the induced map between pullbacks (of inclusions) by a right fibration a deformation retract?
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Proof Sketch: The pullback of the inclusion of the 0th vertex into the standard n-simplex by a right fibration is a deformation retract (450 point bounty if answered by 2am EST)
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What is the Implicit Function Theorem good for?
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Infinite-dimensional complex polynomial or rational Lie algebras and their pseudogroups
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When is the neighbourhood of a set a ball?
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Definition of Connected Subspace
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About universal coefficient theorem
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Reduced rings, idempotents and their prime spectrum
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Why does the area function of a parallelogram have a nonintuitive geometric solution?
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Explicit invariants (under change of basis) of maps $V \to V \otimes V$.
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An explicit description of Lawvere’s segment in the category of simplicial sets
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If two “homogeneous” algebraic varieties are isomorphic, are they necessarily related by a linear map?
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The ring of finite algebras over Z/p^n (2)
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slight extension to classification of finitely generated abelian groups
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Are the Platonic solids shadows of 4-polytopes?
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