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earned this badge 184 times.
Is there an "undecided" assertion of which a proof that it's not undecidable is known?
Awarded Jan 24 at 22:19
Endless controversy about the correctness of significant papers
Awarded Jan 1 at 14:06
Postal code numbering adjacency problem
Awarded Oct 5, 2023 at 16:31
How many functions are there from a set to itself, up to isomorphism?
Awarded Aug 18, 2023 at 7:35
Diophantine entertainment -- mixed natural numbers
Awarded Aug 14, 2023 at 1:16
Dividing a cake between $n-1$, $n$, or $n+1$ guests
Awarded Aug 9, 2023 at 15:48
Divisors of $a^n+1$
Awarded Aug 1, 2023 at 3:56
111...11 base p = 111...11 base q
Awarded Jul 31, 2023 at 8:42
Brute force open problems in graph theory
Awarded Jul 8, 2023 at 18:21
Oddities of evenness
Awarded May 31, 2023 at 20:47
What are examples of problems we know how to solve for primes (or prime powers), but not for composites?
Awarded Feb 4, 2023 at 13:55
Results from abstract algebra which look wrong (but are true)
Awarded Jan 21, 2023 at 22:25
Good "casual" advanced math books
Awarded Nov 12, 2022 at 21:42
Tiling survey that updates "Tilings and patterns"?
Awarded Oct 25, 2022 at 9:06
Do consecutive integers have a big prime factor?
Awarded Jul 29, 2022 at 20:15
Is this number already known to be transcendental? Is there a survey about up-to-date trascendence results?
Awarded Jul 5, 2022 at 9:47
Priming for the primes
Awarded Jun 26, 2022 at 20:52
Priming for the primes
Awarded Jun 26, 2022 at 3:26
Erdős-Szekeres game
Awarded Jan 21, 2022 at 9:40
A gamma function identity
Awarded Dec 25, 2021 at 11:15
How would you have answered Richard Feynman's challenge?
Awarded Dec 6, 2021 at 10:18
Attribution of the quote "a mathematician is someone who is cautious in the presence of the obvious"
Awarded Nov 21, 2021 at 11:09
Size of set of integers with all sums of two distinct elements giving squares
Awarded Nov 12, 2021 at 10:16
What are some very important papers published in non-top journals?
Awarded Oct 5, 2021 at 4:25
Results in linear algebra that depend on the choice of field
Awarded Sep 25, 2021 at 2:16
Prominent non-mathematical work of mathematicians
Awarded Jul 25, 2021 at 16:37
Consecutive Integer Squared Square
Awarded Jun 25, 2021 at 16:08
List of problems for graduate topics?
Awarded May 20, 2021 at 23:46
Are the nontrivial zeros of the Riemann zeta simple?
Awarded Mar 24, 2021 at 11:41
Teaching prime number theorem in a complex analysis class for physicists
Awarded Feb 22, 2021 at 7:50
Can a mathematical definition be wrong?
Awarded Dec 15, 2020 at 21:36
Determinant of a $3\times3$ magic square
Awarded Dec 12, 2020 at 2:03
What are some mathematical sculptures?
Awarded Apr 28, 2020 at 21:20
Conway's lesser-known results
Awarded Apr 12, 2020 at 12:45
How can we find n points on a plane so that as many pairs of points as possible have the same distance?
Awarded Mar 19, 2020 at 13:55
Mathematicians with both “very abstract” and “very applied” achievements
Awarded Jan 1, 2020 at 22:30
Conceptual insights and inspirations from experimental and computational mathematics
Awarded Dec 3, 2019 at 15:40
Hyperrectangles with integer diagonals
Awarded Nov 23, 2019 at 6:35
Open problems with monetary rewards
Awarded Oct 30, 2019 at 23:50
Extremely messy proofs
Awarded Oct 24, 2019 at 21:55
Does Chowla's conjecture on the Liouville function imply the Riemann hypothesis?
Awarded Oct 3, 2019 at 8:05
Examples of "unsuccessful" theories with afterlives
Awarded Sep 21, 2019 at 21:50
Examples of "unsuccessful" theories with afterlives
Awarded Sep 19, 2019 at 7:05
Examples where "thin + thin = nice and thick"
Awarded Sep 5, 2019 at 20:10
Distinguishing Square Knot and Granny Knot using Quandles
Awarded Jul 29, 2019 at 16:40
Examples of simultaneous independent breakthroughs
Awarded Jul 27, 2019 at 11:50
What are the connections between pi and prime numbers?
Awarded Jun 5, 2019 at 15:50
Algebraic P vs. NP
Awarded May 29, 2019 at 23:40
Examples where existence is harder than evaluation
Awarded May 9, 2019 at 12:50
Examples where existence is harder than evaluation
Awarded May 8, 2019 at 5:20
Striking applications of Baker's theorem
Awarded Mar 14, 2019 at 20:50
Short papers for undergraduate course on reading scholarly math
Awarded Jan 19, 2019 at 18:35
Asymptotic density of k-almost primes
Awarded Nov 15, 2018 at 9:40
Widely accepted mathematical results that were later shown to be wrong?
Awarded Oct 29, 2018 at 17:25
Is there a known Turing machine which halts if and only if the Collatz conjecture has a counterexample?
Awarded Sep 25, 2018 at 15:10
Are there examples of conjectures supported by heuristic arguments that have been finally disproved?
Awarded Aug 18, 2018 at 7:35
Infinite series with signed sums
Awarded Jun 28, 2018 at 13:25
Find a formula for the recurrent sequence $q_{n+1}=q_n(q_n+1)+1$
Awarded Jun 18, 2018 at 11:49
The logic of Buddha: a formal approach
Awarded Jun 7, 2018 at 19:08
Prove $ n!$ is divisible by the number of its positive divisors
Awarded May 25, 2018 at 12:25
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