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Necromancer

Answer a question more than 60 days later with score of 5 or more. This badge can be awarded multiple times.

Awarded 11803 times.

Can differential forms be generalized to (separable) Banach spaces?

Awarded yesterday

user160629

3712 silver badges7 bronze badges

Gauss-Weingarten relations

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meraj hosseini

1061 silver badge4 bronze badges

Evaluate $\lim_{n\to \infty} \left( \sum_{r=0}^n \frac {2^r}{5^{2^r}+1}\right) $

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Paramanand Singh♦

85k14 gold badges134 silver badges301 bronze badges

Why is $e^{\pi \sqrt{163}}$ almost an integer?

Awarded yesterday

Neptune

3702 silver badges11 bronze badges

Is the dihedral group $D_n$ nilpotent? solvable?

Awarded 2 days ago

Joe

4115 silver badges11 bronze badges

Law of large numbers for Plancherel random Young diagrams

Awarded 2 days ago

Piotr Śniady

2812 silver badges9 bronze badges

Value of $\psi\left(\frac{1}{2}\right)$

Awarded Sep 18 at 21:57

Felix Marin

88k10 gold badges161 silver badges194 bronze badges

Using the same limit for a second derivative

Awarded Sep 18 at 20:16

leonbloy

61.2k10 gold badges70 silver badges149 bronze badges

Orientability of the level set of a map between abstract oriented manifold

Awarded Sep 18 at 12:28

Overflowian

5,43318 silver badges33 bronze badges

Connection on principal $G$-bundle v.s. connection on associated vector bundle

Awarded Sep 18 at 11:58

nicrot000

1,3973 silver badges11 bronze badges

Does there exist an $n$ such that all groups of order $n$ are Abelian?

Awarded Sep 18 at 9:09

goblin GONE

66.8k18 gold badges99 silver badges279 bronze badges

A question about stochastic processes and stopping times (Galmarino's test)

Awarded Sep 18 at 3:36

clay

2,60920 silver badges33 bronze badges

Euclidean domain: every irreducible element is prime

Awarded Sep 17 at 20:56

Xam

5,9895 gold badges26 silver badges53 bronze badges

Failure of Newton-Leibniz formula

Awarded Sep 17 at 18:47

Alex Ravsky

82.1k4 gold badges50 silver badges159 bronze badges

Riemann tensor in terms of the metric tensor

Awarded Sep 17 at 10:36

Okba

811 silver badge3 bronze badges

How should I study The Matrix Cookbook?

Awarded Sep 17 at 5:08

user96265

1511 silver badge3 bronze badges

Is Apéry's constant a rational multiple of $ \pi ^ 3$?

Awarded Sep 16 at 15:55

Klangen

5,0255 gold badges33 silver badges70 bronze badges

Integral $\int_{-1}^1\frac1x\sqrt{\frac{1+x}{1-x}}\ln\left(\frac{2\,x^2+2\,x+1}{2\,x^2-2\,x+1}\right) \mathrm dx$

Awarded Sep 14 at 20:37

Ivan

7256 silver badges8 bronze badges

Dimension of $GL(n, \mathbb{R})$

Awarded Sep 14 at 16:03

MrHolmes

4553 silver badges9 bronze badges

Why is the Laplacian important in Riemannian geometry?

Awarded Sep 14 at 3:43

Quarto Bendir

6344 silver badges10 bronze badges

Why are the quaternions not an algebra over the complex numbers?

Awarded Sep 13 at 19:55

Kenta S

14k15 gold badges23 silver badges52 bronze badges

Is it true that for any compact Riemannian manifold, the sectional curvature is bounded?

Awarded Sep 13 at 16:42

Nicolas Boumal

6076 silver badges14 bronze badges

Prove that an open subset of a Baire space is a Baire space

Awarded Sep 12 at 18:57

PatrickR

3,5411 gold badge21 silver badges42 bronze badges

Fastest way to find modular multiplicative inverse

Awarded Sep 12 at 14:18

WhatsUp

21.6k18 silver badges45 bronze badges

Proving there exists an isomorphism between the direct sum of the homology groups of path components and the homology group of the whole space

Awarded Sep 12 at 8:51

MathsIsFun

8291 gold badge7 silver badges16 bronze badges

What is the Cohomology Tree Probability Distribution?

Awarded Sep 12 at 8:11

user68822

1661 silver badge3 bronze badges

Does the intersection of two finite index subgroups have finite index?

Awarded Sep 12 at 6:50

Awra Dip

591 silver badge2 bronze badges

Extension Theorem for the Sobolev Space $W^{1, \infty}(U)$

Awarded Sep 12 at 6:42

Nirav

1,1847 silver badges19 bronze badges

Is there a bounded, increasing elementary function with unbounded derivative?

Awarded Sep 11 at 21:58

mr_e_man

4,5611 gold badge16 silver badges47 bronze badges

Counting $k$-ary labelled trees

Awarded Sep 11 at 17:25

Marko Riedel

59.8k3 gold badges64 silver badges140 bronze badges

A geometry problem with the reflection of the incenter

Awarded Sep 11 at 12:46

brainjam

8,0611 gold badge19 silver badges36 bronze badges

Why do all circles passing through $a$ and $1/\bar{a}$ meet $|z|=1$ are right angles?

Awarded Sep 11 at 12:06

movie_bull

611 silver badge1 bronze badge

Prove there exists a unique $n$-th degree polynomial that passes through $n+1$ points in the plane

Awarded Sep 11 at 9:30

Theo

511 silver badge1 bronze badge

Is any differentiable function $f : (0,1)\rightarrow [0,1]$ is uniformly continuous

Awarded Sep 11 at 3:28

Bimal Maiti

511 silver badge1 bronze badge

How to represent XOR of two decimal Numbers with Arithmetic Operators

Awarded Sep 10 at 12:18

u8it

1511 silver badge3 bronze badges

Prime ideals in $A$ and prime ideals in $S^{-1}A$

Awarded Sep 10 at 5:55

Robert Cardona

8,9614 gold badges59 silver badges127 bronze badges

Applying the Beukers-like irrationality proof for $\zeta(2)$ and $\zeta(3)$ to Catalan's constant: where does it fail?

Awarded Sep 9 at 17:57

Dr. Fabio M. S. Lima

3283 silver badges10 bronze badges

Dot product versus matrix multiplication, is the later a special case of the first?

Awarded Sep 9 at 13:47

sinclair

1521 silver badge6 bronze badges

How is the automorphism group of a Lie group given a differential structure?

Awarded Sep 9 at 2:16

Moishe Kohan

92.2k6 gold badges113 silver badges207 bronze badges

Hausdorff condition for CW complexes

Awarded Sep 8 at 13:33

Ryan Maguire

811 silver badge5 bronze badges

Proof of the Existence of All Phone Numbers in $\pi$

Awarded Sep 8 at 8:09

Arvid Samuelsson

9323 silver badges18 bronze badges

Characteristic function of Cantor distribution

Awarded Sep 8 at 7:27

Karho

911 silver badge6 bronze badges

Closed form of $\sum_{n=1}^{\infty} \left(\frac{H_n}{n}\right)^4$

Awarded Sep 7 at 4:47

Aditya Kumar

1,48312 silver badges23 bronze badges

Closed form of $\sum_{n=1}^{\infty} \left(\frac{H_n}{n}\right)^4$

Awarded Sep 7 at 4:47

xuce1234

1,3327 silver badges12 bronze badges

Hexagon grid coordinate system

Awarded Sep 7 at 3:42

Konchog

1931 silver badge6 bronze badges

Geometric and algebraic definitions of the dot product , proof of equivalence?

Awarded Sep 6 at 13:50

Madavan Viswanathan

1671 silver badge8 bronze badges

Complexity of FFT algorithms (Cooley-Tukey, Bluestein, Prime-factor)

Awarded Sep 6 at 13:06

Eduard Semsch

661 silver badge3 bronze badges

Existence of minimizer for strongly convex function on closed, convex set

Awarded Sep 6 at 12:36

David Pal

691 silver badge3 bronze badges

Evaluating $\int^1_0 \frac{\log(1+x)\log(1-x) \log(x)}{x}\, \mathrm dx$

Awarded Sep 6 at 9:27

user97357329

4,75725 silver badges41 bronze badges

Is $ f_n=\frac{(x+1)^n-(x^n+1)}{x}$ irreducible over $\mathbf{Z}$ for arbitrary $n$?

Awarded Sep 5 at 17:21

user26872

19.1k3 gold badges43 silver badges94 bronze badges

Calculating $\text{erf}^{-1}(z)$ for $z\in\mathbb{C}$

Awarded Sep 5 at 14:51

Ruslan

6,6552 gold badges24 silver badges54 bronze badges

How does making a brick wall *curvy* save material?

Awarded Sep 5 at 6:25

MJ713

1611 silver badge6 bronze badges

Riemann integrability if the set of discontinuities has finitely many accumulation points

Awarded Sep 4 at 13:20

Paramanand Singh♦

85k14 gold badges134 silver badges301 bronze badges

Sum of sum of $k$th power of first $n$ natural numbers.

Awarded Sep 4 at 13:20

Gottfried Helms

34.6k3 gold badges66 silver badges142 bronze badges

Pseudo Inverse Solution for Linear Equation System Using the SVD

Awarded Sep 4 at 12:36

dantopa

10.1k10 gold badges43 silver badges80 bronze badges

Recurrence relations book

Awarded Sep 3 at 17:06

epi163sqrt

105k6 gold badges100 silver badges236 bronze badges

The Rankine-Hugoniot jump conditions for conservation and balance laws

Awarded Sep 2 at 23:57

Mark

5781 gold badge5 silver badges19 bronze badges

Outer Measure of a countable union of disjoint intervals

Awarded Sep 2 at 16:17

teachbarefoot

661 silver badge5 bronze badges

Find a complete sufficient statistics, or show that one does not exist

Awarded Sep 2 at 4:27

venrey

5274 silver badges15 bronze badges

Derivative of an integral quantity involving a moving level set

Awarded Sep 2 at 4:08

André Schlichting

2112 silver badges3 bronze badges

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