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earned this badge 64 times.
Tennenbaum's Theorem and polynomials
Awarded Mar 4 at 17:05
Galois theory and algorithms
Awarded Oct 15, 2023 at 9:55
Levi-Civita connections from metrics on the orthogonal frame bundle
Awarded Mar 31, 2022 at 10:07
Non-linear "Fourier analysis"
Awarded Dec 20, 2021 at 4:07
Good notions of "perfect number" for rings of integers more general than ${\Bbb Z}$?
Awarded Nov 27, 2021 at 20:12
Automorphic forms and quantum groups
Awarded Feb 11, 2021 at 2:06
Packing and isoperimetrics
Awarded Jan 13, 2021 at 17:05
Does the Fourier expansion of the j-function have any prime coefficients?
Awarded Nov 23, 2020 at 19:38
Knot diagrams, sets of moves and equivalence relations
Awarded Mar 24, 2019 at 22:20
The Euler-Mascheroni constant and entropy
Awarded Feb 13, 2019 at 0:55
Localic locales? Towards very pointless spaces by iterated internalization.
Awarded Oct 10, 2018 at 17:05
The square root of Wilson's theorem when $p\equiv 1 \mod 4$
Awarded Feb 25, 2018 at 7:35
Most wanted Diophantine equations
Awarded Dec 23, 2017 at 17:52
In ZF, when is a disjoint union of metrizable spaces metrizable?
Awarded Oct 22, 2017 at 21:14
Limits of rearranged sequences along ultrafilters
Awarded Oct 12, 2016 at 2:37
"You can't push a rope" [closed]
Awarded Dec 11, 2015 at 14:53
Not especially famous, long-open problems which higher mathematics beginners can understand
Awarded Oct 26, 2015 at 7:12
Is every $\sigma$-algebra of sets *abstractly* the Borel algebra of a topology on perhaps some other set?
Awarded Mar 31, 2015 at 17:11
Ferdinand Gotthold Max Eisenstein composer? [closed]
Awarded Jan 7, 2014 at 23:39
Where and when did "transition to abstraction" courses start?
Awarded Dec 15, 2013 at 1:07
Combinatorial Hilbert spaces
Awarded Oct 27, 2013 at 14:45
Nullstellensatz for quaternionic plane curves?
Awarded Sep 5, 2013 at 22:37
Galois theory: Generalization of Abel's Theorem?
Awarded Feb 28, 2013 at 20:35
Galois theory: Generalization of Abel’s Theorem? (Better version!)
Awarded Feb 26, 2013 at 9:35
Individual mathematical objects whose study amounts to a (sub)discipline? [closed]
Awarded Nov 15, 2012 at 11:20
Teichmuller modular forms and number theory
Awarded Nov 12, 2012 at 1:20
Idiosyncratic characterizations of $\ell^p$, for $p\not=1,2,\infty$
Awarded Oct 26, 2012 at 13:50
Mazur's unpublished manuscript on primes and knots?
Awarded Oct 7, 2012 at 3:20
Cheap, non-constructive, free group generating rotations for Banach-Tarski
Awarded Aug 5, 2012 at 21:50
Dynamical systems, minimal sets and the Axiom of Choice
Awarded Jul 24, 2012 at 0:05
Hearing the 17 planar symmetry groups
Awarded Jul 22, 2012 at 23:05
ZF and and the number of non-principal ultrafilters
Awarded Jul 22, 2012 at 22:50
If the Riemann Hypothesis fails, must it fail infinitely often?
Awarded Jun 21, 2012 at 23:05
Website to help track recent research level mathematical book publications?
Awarded Jun 19, 2012 at 2:20
A puzzling remark of Manin (ICM 1978)
Awarded Jun 17, 2012 at 20:05
Non-standard enlargements, $\zeta(s)$ and analytic continuation
Awarded May 24, 2012 at 16:50
Inconsistency and workaday independence.
Awarded May 2, 2012 at 7:20
Pseudogroups and the flavors of the topology of manifolds
Awarded Apr 17, 2012 at 2:05
What makes a theorem *a* "nullstellensatz."
Awarded Mar 6, 2012 at 14:50
Nontrivial circular arguments?
Awarded Dec 2, 2011 at 6:20
Constructions unique up to non-unique isomorphism
Awarded Oct 22, 2011 at 11:20
A particular combinatorial proof of Wilson's theorem
Awarded Jul 2, 2011 at 19:50
Modeling question: how often does "the world's oldest person" die?
Awarded Jul 2, 2011 at 16:50
Collecting proofs that finite multiplicative subgroups of fields are cyclic
Awarded May 18, 2011 at 7:20
Induction, the infinitude of the primes, and workaday number theory
Awarded May 4, 2011 at 13:35
Roth's theorem, Lang's conjecture and beyond
Awarded Mar 27, 2011 at 1:20
Concerning the rarity of provably transcendental real numbers
Awarded Mar 24, 2011 at 4:50
What are the external triumphs of matroid theory?
Awarded Mar 12, 2011 at 16:20
Does Godel's incompleteness theorem admit a converse?
Awarded Feb 26, 2011 at 5:05
Permutations, stopping times, Bessel functions, hook formula and Robinson-Schensted
Awarded Feb 9, 2011 at 7:05
Careless packing
Awarded Feb 2, 2011 at 12:20
What are the generalizations of the 27 lines on a cubic surface?
Awarded Feb 2, 2011 at 0:50
The deep significance of the question of the Mandelbrot set's local connectedness?
Awarded Jan 31, 2011 at 8:05
(Approximately) bijective proof of $\zeta(2)=\pi^2/6$?
Awarded Jan 28, 2011 at 10:35
Affine "real algebraic geometry" of hyperbolic space?
Awarded Jan 21, 2011 at 14:35
Classroom platonism
Awarded Dec 27, 2010 at 18:35
Not especially famous, long-open problems which anyone can understand
Awarded Dec 24, 2010 at 14:20
Automorphisms of a certain digraph defined on the set of primes? [Edited]
Awarded Dec 23, 2010 at 2:05
"Small" maps from sphere to sphere
Awarded Dec 21, 2010 at 4:50
An equivalence relation on group actions
Awarded Dec 17, 2010 at 13:05
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