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The topological analog of flatness?

aug 10 10 at 12:36 ABayer 1,474●1●9●17

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Kirby calculus and local moves

feb 8 11 at 8:31 Bruno Martelli 4,732●1●12●33

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Mathematical “urban legends” (3)
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What universities have laid off tenured math faculty for financial reasons?
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Can non-homeomorphic spaces have homeomorphic squares?
31
Math puzzles for dinner
24
Famous mathematicians with background in arts/humanities/law etc
22
Why do so many textbooks have so much technical detail and so little enlightenment?
21
How has modern algebraic geometry affected other areas of math?
20
Analytic tools in algebraic geometry
20
Facts from algebraic geometry that are useful to non-algebraic geometers (2)
17
What are some of the big open problems in 3-manifold theory? (2)
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Your favorite surprising connections in Mathematics
17
Can a Lie group as an abstract group be given more than one topology making it a Lie group?
15
What are some open problems in algebraic geometry?
15
Are the stiefel-Whitney classes of the tangent bundle determined by the mod 2 cohomology?
15
Is it true that every projective curve is a union of two affine curves?
13
“Largest” finite-dimensional Lie subgroups of Diff(S^n), are they known?
13
How do professional mathematicians learn new things?
13
Birational invariants and fundamental groups
13
Rolle’s theorem in n dimensions
13
If the total Chern class of a vector bundle factors, does it have a sub-bundle?
12
Ideas on how to prevent a department from being shut down.
12
Does there exist a complex Lie group G such that …
12
How to disjoint two cycles with zero intersection?
12
Why the similarity between Hodge theory for compact Riemannian and complex manifolds?
12
Classification problem for non-compact manifolds
12
(Co)homology of the Eilenberg-MacLane spaces K(G.n)
11
Group Structure on CP^infinty
11
Is every closed embedded codimension-n submanifold cut out by a section of a rank-n vector bundle?
11
On the fundamental group of hypersurfaces
11
Non-stably trivial bundle with trivial charactertic classes
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