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earned this badge 131 times.
Naturality of Lie bracket — alternate proof
Awarded Mar 29 at 14:36
Contractibility of the space of collars
Awarded Feb 25 at 8:08
Restrictions of diffeomorphisms
Awarded Feb 23 at 9:40
Isotopic diffeomorphisms of the sphere
Awarded Jan 20 at 15:50
Difference of two-sided and oriented
Awarded Dec 13, 2023 at 7:17
Persistent homology of Gaussian fields in Euclidean space
Awarded Aug 24, 2023 at 13:06
What is a cohomology theory (seriously)?
Awarded Apr 8, 2023 at 1:04
$\pi_k(\mathbb{S}^n\vee\mathbb{S}^n)$
Awarded Dec 18, 2022 at 19:07
Is the restriction map for embeddings of manifolds with boundary a fibration?
Awarded Oct 20, 2022 at 6:33
Rational homotopy groups of $S^2\vee S^2$
Awarded Oct 2, 2022 at 16:50
Whitehead doubles of any knots
Awarded Feb 26, 2022 at 18:56
Diffeomorphism group of the projective plane
Awarded Feb 17, 2022 at 13:36
What motivated Thom to relate the cobordism groups with some homotopy groups?
Awarded Dec 25, 2021 at 21:05
Unknotted $S^{n-2}$ in $S^n$
Awarded Jun 20, 2021 at 0:00
Applications of the Brown Representability Theorem
Awarded Apr 3, 2021 at 18:56
What does ! above = mean
Awarded Mar 30, 2021 at 14:27
Intutive interpretation about Linking forms
Awarded Feb 24, 2021 at 23:30
Distributing the Hodge map over the wedge product
Awarded Dec 20, 2020 at 0:55
There must be a good introductory numerical analysis course out there!
Awarded Mar 29, 2020 at 10:10
CW-structures and Morse functions: a reference request
Awarded Jan 30, 2020 at 18:05
Are the mapping class groups of manifolds finitely presentable?
Awarded Jan 15, 2020 at 15:40
PDE on manifolds
Awarded Dec 28, 2019 at 8:35
What non-categorical applications are there of homotopical algebra?
Awarded Dec 21, 2019 at 19:50
When to split/merge papers?
Awarded Dec 12, 2019 at 8:15
Relationship between double tangent bundle, exterior derivative and connection
Awarded Aug 24, 2019 at 4:55
Does a manifold which bounds always admit a free involution?
Awarded Apr 22, 2019 at 18:30
What are some of the big open problems in 3-manifold theory?
Awarded Feb 10, 2019 at 11:00
Alexander duality in terms of morse function?
Awarded Jun 14, 2018 at 19:21
Seifert surfaces via Alexander duality
Awarded Jun 14, 2018 at 13:53
What are the points of Spec(Vassiliev Invariants)?
Awarded May 19, 2018 at 2:03
Is there a smooth free circle action on the Klein bottle?
Awarded Feb 5, 2018 at 22:07
Knot complements with respect to Thurston's 8 geometries
Awarded Dec 14, 2017 at 23:40
What part do arguments from authority play in mathematical reasoning?
Awarded Oct 19, 2017 at 22:47
What is an interpretation of the relation in the cohomology of the pure braid groups?
Awarded Oct 4, 2017 at 6:09
Why is $\mathbb{R}^{\infty}$ defined the way it is?
Awarded Sep 1, 2017 at 5:36
Is there a "knot theory" for graphs?
Awarded Aug 9, 2017 at 22:13
A Compact Manifold with odd Euler characteristic whose tangent bundle admits a field of lines
Awarded Jul 31, 2017 at 12:22
Which closed 3-manifolds can be embedded in $R^4$?
Awarded Apr 28, 2017 at 10:40
When is a submanifold of $\mathbf R^n$ given by global equations?
Awarded Feb 8, 2017 at 19:47
First cohomology of the space of long knots in ℝ⁴
Awarded Jan 29, 2017 at 21:27
Smooth structures on PL 4-manifolds
Awarded Jan 29, 2017 at 20:25
Manifold embedded in $R^{n+1}$ with a submanifold that doesn't embed in $R^n$
Awarded Nov 10, 2016 at 17:40
What are some examples of narrowly missed discoveries in the history of mathematics?
Awarded Sep 30, 2016 at 0:37
What are some interesting problems in the intersection of Algebraic Number Theory and Algebraic Topology?
Awarded Apr 3, 2016 at 21:29
Thurston geometries---the geometry of the universal cover of $SL(2, \mathbb{R})$
Awarded Feb 24, 2016 at 18:39
Classification of knots by geometrization theorem
Awarded Jan 19, 2016 at 10:59
Transitivity of automorphism group of smooth manifolds
Awarded Nov 15, 2015 at 20:11
Demonstrating that rigour is important
Awarded Oct 25, 2015 at 9:31
Teichmuller theory and moduli of Riemann surfaces
Awarded Sep 7, 2015 at 0:09
What are the open subsets of $\mathbb{R}^n$ that are diffeomorphic to $\mathbb{R}^n$
Awarded Jul 29, 2015 at 22:19
Is the space of immersions of $S^n$ into $\mathbb R^{n+1}$ simply connected?
Awarded May 19, 2015 at 6:26
Top Chern Class = Euler Characteristic
Awarded May 5, 2015 at 5:30
Reference request: Topology on the space of smooth compact submanifolds
Awarded Feb 1, 2015 at 19:06
Seifert surfaces of torus knots
Awarded Jan 14, 2015 at 23:12
Unstable homotopy groups of spheres beyond Toda's range
Awarded Dec 18, 2014 at 21:51
Strong Whitney embedding theorem for non-compact manifolds
Awarded Nov 24, 2014 at 13:30
The view from inside of a mirrored tetrahedron
Awarded Nov 21, 2014 at 5:16
Is the unit tangent bundle of $S^{n}$ parallelizable?
Awarded Nov 6, 2014 at 4:20
Unknotting number of knot diagrams
Awarded Nov 3, 2014 at 6:38
Reference for a fact (?) on homeomorphic knot complements
Awarded Oct 31, 2014 at 6:09
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