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earned this badge 89 times.
Is there a bound on the length of the longest Morse trajectory?
Awarded Oct 20, 2021 at 7:06
Gluing two diffeomorphisms together
Awarded Feb 24, 2019 at 17:35
Cheap, non-constructive, free group generating rotations for Banach-Tarski
Awarded Aug 21, 2018 at 14:30
An elementary question about the cut locus
Awarded Aug 8, 2018 at 21:20
A random walk on random lines
Awarded May 10, 2017 at 11:59
Cusp width for an arbitraty Fuchsian group
Awarded Apr 10, 2017 at 14:53
What is the quantity 2(handles)+crosscaps called?
Awarded Nov 15, 2016 at 16:50
Entropy of first return map and suspension flows
Awarded Nov 8, 2016 at 19:34
Homomorphisms of the free group $F_n$ to $GL_k(\mathbb{R})$
Awarded Apr 21, 2016 at 12:45
Geodesics for a Homogeneous Space?
Awarded Nov 2, 2015 at 20:00
Counting characteristic subgroups
Awarded Jun 23, 2015 at 11:59
Perron number distribution
Awarded Aug 30, 2013 at 11:35
Lecture notes by Thurston on tiling
Awarded Oct 21, 2012 at 13:20
Nash embedding theorem for 2D manifolds
Awarded Jul 27, 2012 at 1:05
Hypersurfaces orthogonal to a cone
Awarded Jun 20, 2012 at 9:50
A circle packing conjecture
Awarded Jun 20, 2012 at 9:35
Is there an explicit bound on the number of tetrahedra needed to triangulate a hyperbolic 3-manifold of volume V?
Awarded May 30, 2012 at 16:50
Is there an underlying explanation for the magical powers of the Schwarzian derivative?
Awarded Mar 14, 2012 at 9:35
Riemannian surfaces with an explicit distance function?
Awarded Mar 12, 2012 at 9:50
Totally geodesic surfaces in fibered 3-manifolds
Awarded Feb 4, 2012 at 3:05
Trapped rays bouncing between two convex bodies
Awarded Dec 18, 2011 at 4:35
Is the semigroup of nonnegative integer matrices with determinant 1 finitely generated?
Awarded Dec 11, 2011 at 23:35
Fundamental polygons with infinite pairwise identifications
Awarded Nov 9, 2011 at 17:35
Can we add two matrices by performing an operation on their eigenvalues & eigenvectors?
Awarded Nov 8, 2011 at 7:35
Non-conjugate words with the same trace
Awarded Sep 1, 2011 at 23:20
Quotients of unipotent groups
Awarded Aug 2, 2011 at 18:35
Existence of a zero-sum subset
Awarded May 28, 2011 at 13:35
What upper bounds are known for the diameter of the minimum spanning tree of $n$ uniformly random points in $[0,1]^2$?
Awarded May 24, 2011 at 9:35
Vector valued functions
Awarded May 8, 2011 at 7:35
Surface bundles over a surface
Awarded Apr 18, 2011 at 23:50
Tying knots with reflecting lightrays
Awarded Apr 18, 2011 at 15:35
Is there a simple proof that a group of linear growth is quasi-isometric to Z?
Awarded Apr 8, 2011 at 3:50
How to distribute the source of programs used in a paper?
Awarded Apr 7, 2011 at 4:50
Is the sphere the only surface with circular projections? Or: Can we deduce a spherical Earth by observing that its shadows on the Moon are circular?
Awarded Mar 8, 2011 at 9:50
When does iterating $z \mapsto z^2 + c$ have an exact solution?
Awarded Feb 12, 2011 at 18:35
Effective contraction of a loop. Reference or a simple proof?
Awarded Feb 5, 2011 at 21:35
Which groups have nice compactifications ?
Awarded Feb 4, 2011 at 0:50
Finite groups with elements of the same order
Awarded Feb 4, 2011 at 0:35
The vector field of a given flow
Awarded Feb 4, 2011 at 0:20
Complete metric on the space of Jordan curves?
Awarded Feb 4, 2011 at 0:05
Coordinatizing the disk via Brownian motion
Awarded Feb 3, 2011 at 23:50
What's a mathematician to do?
Awarded Feb 3, 2011 at 23:35
Classification of surfaces composed of circles
Awarded Feb 3, 2011 at 23:20
transformation properties of divergence (of a vector field)
Awarded Jan 27, 2011 at 13:50
Transpositions of order three
Awarded Jan 27, 2011 at 0:20
Fair but irregular polyhedral dice
Awarded Jan 24, 2011 at 22:05
Which motion is exclusive in 3D or higher dimensions?
Awarded Jan 24, 2011 at 9:50
Solutions to some equations in a free group
Awarded Jan 23, 2011 at 23:35
Analytic functions with isotopic x-rays
Awarded Jan 21, 2011 at 1:20
Forbidden mirror sequences
Awarded Jan 18, 2011 at 13:20
Minimal polynomial with a given maximum in the unit interval
Awarded Jan 16, 2011 at 22:20
Finding points inside innermost convex hull
Awarded Jan 14, 2011 at 10:35
Floating polyhedra with fair equilibria
Awarded Jan 11, 2011 at 4:50
Many flat totally geodesic surfaces ⇒ flat?
Awarded Jan 4, 2011 at 17:05
Groups "approximately commutative" near the identity
Awarded Jan 3, 2011 at 2:35
Glue two solenoids along their boundaries
Awarded Jan 2, 2011 at 23:20
Computing homotopies
Awarded Jan 2, 2011 at 17:05
Infinitely many solutions of a diophantine equation
Awarded Jan 2, 2011 at 4:35
Relationship between quasicrystals and PV numbers
Awarded Dec 29, 2010 at 15:50
A question about non-norm-euclidean real quadratic fields
Awarded Dec 26, 2010 at 20:50
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