Revival - Badge - MathOverflow

Revival

Answer more than 30 days after a question was asked as first answer scoring 2 or more. This badge can be awarded multiple times.

Awarded 6034 times.

Rigorous treatment of Ostrogradsky's instability theorem?

Awarded 4 hours ago

Carlo Beenakker

183k17 gold badges440 silver badges636 bronze badges

Examples of Heyting categories that are not toposes?

Awarded 7 hours ago

Rodrigo Nicolau Almeida

1214 bronze badges

Elementary questions on motives

Awarded 9 hours ago

nxir

1,4598 silver badges14 bronze badges

Liouville property of hyperbolic spaces

Awarded 2 days ago

R W

16.8k3 gold badges36 silver badges73 bronze badges

Example of applying real quantifier elimination algorithm for polynomials

Awarded Jul 17 at 11:25

Maaz

413 bronze badges

A Lie group whose Lie algebra is equal to (the Lie algebra? of )all functions with fibrewise polynomial growth

Awarded Jul 17 at 9:42

Stefan Waldmann

8,0646 gold badges41 silver badges66 bronze badges

Examples for Bogomolov multiplier of finite group

Awarded Jul 17 at 1:45

Eric S.

6465 silver badges12 bronze badges

Is there a version of Weyl's law for graph Laplacians?

Awarded Jul 16 at 15:13

Will Sawin

141k9 gold badges308 silver badges539 bronze badges

A generalization of the Powers-Stormer inequality

Awarded Jul 15 at 19:11

Chris Ramsey

3,9843 gold badges17 silver badges41 bronze badges

An isomorphic classification of non-associative division octonion algebras

Awarded Jul 15 at 12:03

Skip

2,10317 silver badges20 bronze badges

Closed form for binomial coefficient sum

Awarded Jul 13 at 20:21

Ira Gessel

16.6k1 gold badge54 silver badges77 bronze badges

Orthosymplectic superalgebra

Awarded Jul 13 at 2:05

Steven Sam

10.4k3 gold badges43 silver badges78 bronze badges

Complemented subspaces of $C(\beta\mathbb N\times \beta\mathbb N)$

Awarded Jul 11 at 20:25

Jakub Rondoš

412 bronze badges

Obstacles to computing $\pi(n)$ in $O(n^{2/3-\epsilon})$ time

Awarded Jul 10 at 9:07

Elegia

213 bronze badges

On Clenshaw's summation formula

Awarded Jul 8 at 15:15

user3078439

3331 silver badge7 bronze badges

A sequence potentially consisting of only integers

Awarded Jul 8 at 9:33

Antoine de Saint Germain

1411 silver badge8 bronze badges

More than one recurrence point (Birkhoff)

Awarded Jul 7 at 16:31

Ronnie Pavlov

2,5219 silver badges13 bronze badges

Is this formula for certain structure constants of quantum Schubert polynomials known?

Awarded Jul 6 at 20:15

Matt Samuel

2,16811 silver badges22 bronze badges

Parabolic (double) quantum Schubert polynomials Pieri formula

Awarded Jul 6 at 18:55

Matt Samuel

2,16811 silver badges22 bronze badges

Mathematical blogs on "non-standard" platforms (Telegram, Twitter, Dzen , ... )

Awarded Jul 6 at 7:44

Миша Ильинский

93 bronze badges

Shouldn't we expect analytic (in the Berkovich sense) étale cohomology of a number field to be the cohomology of the Artin–Verdier site?

Awarded Jul 4 at 17:41

Eric Ahlqvist

3081 silver badge7 bronze badges

Dimension of Prym variety of cover

Awarded Jul 4 at 13:08

Doug Liu

5452 silver badges10 bronze badges

Implicit function theorem for subdifferentiable convex functions

Awarded Jul 3 at 19:46

Creaptis

292 bronze badges

Systole of Riemann surfaces of genus $g$

Awarded Jul 3 at 14:05

Mikhail Katz

15.8k2 gold badges52 silver badges124 bronze badges

Estermann's argument for the binary additive divisor problem

Awarded Jul 3 at 2:05

Bob Vaughan

511 silver badge2 bronze badges

Rigid non-archimedean real closed fields

Awarded Jul 2 at 12:56

Dave Marker

3,46022 silver badges22 bronze badges

Sphere packing and modular forms in known dimensions (maybe 2)

Awarded Jun 30 at 19:10

Seewoo Lee

2,03311 silver badges15 bronze badges

What is the current fastest method to calculate Lerch's Phi transcendent?

Awarded Jun 29 at 22:04

Ashton Bradley

313 bronze badges

Doubling theorem for Alexandrov spaces

Awarded Jun 29 at 15:34

Anton Petrunin

44.4k14 gold badges132 silver badges296 bronze badges

Localization and space of morphisms

Awarded Jun 28 at 20:41

Ken

2,1549 silver badges19 bronze badges

How strong is the Schröder–Bernstein theorem where one set is the natural numbers?

Awarded Jun 28 at 10:57

Mark Saving

2633 silver badges9 bronze badges

A question on the size of an admissible ordinal

Awarded Jun 27 at 13:41

C7X

1,6961 gold badge8 silver badges30 bronze badges

Name of the class of linearly ordered groups with no minimal positive element

Awarded Jun 27 at 9:48

YCor

62.3k5 gold badges182 silver badges281 bronze badges

Are topologically free and essentially free equivalent for minimal spaces with invariant measures?

Awarded Jun 26 at 19:47

Owen Tanner

1737 bronze badges

Cocartesian fibration classifying $\mathrm{Fun}(F,G)$

Awarded Jun 26 at 9:05

Ken

2,1549 silver badges19 bronze badges

Is this inequality in two variables true?

Awarded Jun 25 at 16:10

River Li

8785 silver badges17 bronze badges

What is the correct term for "co-covering" designs

Awarded Jun 25 at 13:40

Mike

212 bronze badges

How to think of algebraic geometry in characteristic p?

Awarded Jun 25 at 3:08

jack2045

415 bronze badges

Action of finite group vs action of the associated constant group scheme

Awarded Jun 24 at 9:36

Absent mind

413 bronze badges

Why arithmetic Langlands?

Awarded Jun 23 at 23:40

David Corwin

15.5k10 gold badges82 silver badges121 bronze badges

Density of numbers where a large prime factor satisfies a congruence

Awarded Jun 22 at 18:41

Kevin Ford

412 bronze badges

Infinite-dimensional, non-unital Frobenius algebras

Awarded Jun 22 at 14:11

Qwert Otto

6271 silver badge11 bronze badges

Confusion about signs in the definition of an $A_\infty$-algebra

Awarded Jun 21 at 0:09

cbz20

212 bronze badges

Superextendibles defined analogously to superstrong cardinals: Where are they consistency strength-wise?

Awarded Jun 19 at 9:48

Master

1,1231 gold badge8 silver badges26 bronze badges

Perfect matchings of a regular, uniform, partite hypergraph

Awarded Jun 18 at 16:22

alpmu

8056 silver badges11 bronze badges

Are all nonunitary perfect numbers in the form 4k where k is an even perfect number

Awarded Jun 18 at 11:47

JoshuaZ

6,8192 gold badges25 silver badges59 bronze badges

On nontotient Fibonacci numbers

Awarded Jun 17 at 12:16

Max Alekseyev

32k5 gold badges69 silver badges138 bronze badges

The perfect matching problem of planar graph

Awarded Jun 16 at 14:35

Therese Biedl

362 bronze badges

Is there a bicyclic irregular pentagon in integers?

Awarded Jun 15 at 12:18

Oscar Lanzi

1,86520 silver badges17 bronze badges

Bernays' Reflection Principle holding in ranks?

Awarded Jun 14 at 22:52

Master

1,1231 gold badge8 silver badges26 bronze badges

Two basic questions on parabolic induction

Awarded Jun 14 at 20:16

Kenta Suzuki

2,5121 gold badge8 silver badges29 bronze badges

Smooth morse theory of Riemannian distance functions

Awarded Jun 14 at 19:56

Anton Petrunin

44.4k14 gold badges132 silver badges296 bronze badges

Generalizations of a theorem of Edmonds/Tutte on existence of a perfect matching in a graphs

Awarded Jun 14 at 2:07

domotorp

18.6k3 gold badges55 silver badges125 bronze badges

Is every compact smooth Riemannian manifold bilipschitz equivalent to a finite simplicial complex?

Awarded Jun 13 at 19:21

Anton Petrunin

44.4k14 gold badges132 silver badges296 bronze badges

Constructive treatment of Jacobson rings

Awarded Jun 12 at 7:55

Ryota Kuroki

316 bronze badges

Generalization of some plane geometry theorems

Awarded Jun 11 at 12:42

Fedor Petrov

104k9 gold badges253 silver badges433 bronze badges

Kaplansky Idempotent conjecture and Extension theory

Awarded Jun 10 at 21:03

Ali Taghavi

4728 gold badges31 silver badges123 bronze badges

Arithmetic schemes with the same zeta function

Awarded Jun 10 at 10:36

Thomas Geisser

1,45315 silver badges21 bronze badges

Terminology for a partition of a set which includes empty sets

Awarded Jun 10 at 6:32

Martin Brandenburg

62.1k11 gold badges198 silver badges415 bronze badges

A three-line proof of global class field theory?

Awarded Jun 2 at 8:07

user1092847

1,3376 silver badges16 bronze badges

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