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Interesting 48 Bountied Hot Week Month
3 votes
1 answer
62 views

Understanding proof that $\mathbb{R}$ is Cauchy complete

FShrike
  • 20k
0 votes
0 answers
2 views

Expectation of the Sum of K Numbers without replacement

Nice guy
  • 13
1 vote
0 answers
9 views

Short of testing an equation how can one tell if a value could be valid

RWolfe
  • 111
0 votes
0 answers
2 views

A basic example of perfectoid field

user14411
  • 89
-2 votes
0 answers
17 views

What is the cardinality of $2^R$ and $R^R$?

Sassatelli Giulio
  • 488
-2 votes
0 answers
12 views

Prove that the Euclidean space defined by this scalar product is not Hilbert.

Georgi Popov
  • 1
2 votes
2 answers
22 views

Why is the constant assumed to be zero when solving second order differential equation?

A. P.
  • 4,822
2 votes
0 answers
28 views

How to show that $\displaystyle\ln{x}=2\left(\sum_{n=0}^{\infty}\frac{1}{(2n+1)}\left(\frac{x-1}{x+1}\right)^{2n+1}\right)$?

ABC
  • 21
0 votes
0 answers
5 views

Relation between connection on vector bundle and Ehresmann connection on frame bundle

Sha Vuklia
  • 3,214
0 votes
1 answer
18 views

Sum of the reciprocal of n real numbers

uniquesolution
  • 17.5k
0 votes
1 answer
10 views

Is the space of compact linear operators on a separable Banach space separable?

Ryszard Szwarc
  • 15k
3 votes
1 answer
808 views

Complex Projective Line is homeomorphic to the 2-sphere

M.C.
  • 2,099
0 votes
1 answer
19 views

Computing db2 to db20 coefficients

Lutz Lehmann
  • 118k
1 vote
1 answer
4 views

Solving for variable in Summation problem

ConMan
  • 17.4k
1 vote
1 answer
13 views

Difference between (propositions used in proofs) and (propositions of propositional logic)

lemontree
  • 9,870
-1 votes
0 answers
8 views

$\sum_{n>0}\frac{f(n)}{g(n)\ln(2n)^2} = C$?

mick
  • 13.3k
0 votes
0 answers
9 views

Natural Log of an Infinite series of imaginary constants

ItsErtHere
  • 51
0 votes
0 answers
28 views

XOR-Product Modulo Prime

qwr
  • 10.3k
0 votes
0 answers
4 views

How to evaluate the conditional mean of Frechet distribution?

Anna
  • 1
0 votes
0 answers
9 views

I need help graphing a cubic and a quartic degree together in desmos.

Brandon
  • 1
0 votes
0 answers
13 views

How to add weights in a function

nanocat
  • 13
1 vote
1 answer
47 views

Folland pre-meausre for product measure is a pre-measure

tail_recursion
  • 351
0 votes
0 answers
19 views

$f(x)$ is bounded by a quadratic convex function - show it has a minimum

Tomer
  • 418
4 votes
1 answer
32 views

A (maybe) trivial question on trivial vector bundles: alternative definition of trivial vector bundle

l4teLearner
  • 470
0 votes
0 answers
9 views

If the directional derivative of the function $g$ exists in any direction

Harry_Cai
  • 35
1 vote
0 answers
20 views

Does every simply-connected open subset of $S^2$ have connected complement?

Indraneel Tambe
  • 2,005
0 votes
0 answers
18 views

How to solve this ODE with respect to t?

Tianyi Pan
  • 1
1 vote
3 answers
3k views

Prove $E(|X-\mu|) = \sqrt{\frac{2}{\pi}}\sigma$

Jonathan Day
  • 1
1 vote
1 answer
30 views

How to compute $E(\max(0, X))$, where $X \sim \mathcal{N}(\theta, 1/n)$?

heropup
  • 119k
-1 votes
1 answer
25 views

If k integers are selected at random and without replacement from 1 to 100 what is the probability that any of the integers are adjacent?

true blue anil
  • 33.7k
0 votes
0 answers
23 views

Pythagorean "like" quadruples, help with general solutions.

spydragon
  • 159
5 votes
2 answers
761 views

Bilinear form with symmetric "perpendicular" relation is either symmetric or skew-symmetric

user8675309
  • 8,405
4 votes
3 answers
2k views

Inverse logarithmic integral

Tyma Gaidash
  • 7,229
1 vote
0 answers
8 views

Definition of $\mathbb{R}$-invariant almost complex structure

Yoona
  • 198
3 votes
0 answers
81 views
+100

Do differential forms need sheafification?

Michael Barz
  • 31
0 votes
1 answer
24 views

Gradient on the hyperbolic plane

F. Conrad
  • 3,018
0 votes
0 answers
12 views

How to prove this convergence theorem for fixed step size

egrr
  • 3
0 votes
0 answers
27 views

Prove that $P(A)=a_nA^n+a_{n-1}A^{n-1}+...+a_1A+a_0I=0$ if $A$ is diagonalizable.

Emanuel L
  • 11
0 votes
0 answers
6 views

Trapped geodesics on periodic metric

felipeh
  • 3,386
1 vote
1 answer
14 views

Coercivity of a bilinear form defined as a weighted integral

almosteverywhere
  • 1,710
3 votes
1 answer
57 views

A sphere of constant radius $r$ passes through the origin $O$ and cuts the axes in $A,B,C.$ Find the locus of the foot of the perpendicular from $O$

Jean Marie
  • 70.8k
0 votes
0 answers
18 views

A curious multiple derivative identity

Atul Sharma
  • 1
0 votes
1 answer
31 views

Determining the even Fibonacci numbers.

Robert Israel
  • 426k
0 votes
0 answers
3 views

Maintaining the acyclic property of a DAG faster than O(n) time

Ambrus Tóth
  • 101
1 vote
1 answer
37 views

$\binom{mp^n}{p^n}\cong m$ (mod $p$)

Robert Israel
  • 426k
0 votes
0 answers
7 views

Eigenvectors of Pauli Matrices - Phase

jon_m
  • 1
0 votes
0 answers
16 views

Proposition 9.7 of Atiyah, local domain which is not a field.

Jo.G.H
  • 23
0 votes
0 answers
16 views

Set of all endomorphisms that commute with given endomorhphism $F$, with $\mu_F = \chi_F$ is the same as $\mathbb{k}[F]$.

cawabynga
  • 1
0 votes
0 answers
12 views

An intuitive resource about queuing theory

Approximations
  • 1
0 votes
1 answer
37 views

Is $\sin(440\cdot2\pi x)+\sin(440\cdot 2^{1/4}\cdot2\pi x)+\sin(440\cdot2^{1/2}\cdot2\pi x)$ periodic?

Bruno B
  • 953
0 votes
1 answer
18 views

How do you calculate the average of 2 line gradients efficiently?

Intelligenti pauca
  • 44.7k
0 votes
1 answer
7 views

Finding the rate distortion function

stochasticboy321
  • 6,398
3 votes
0 answers
43 views

Relationship between measure theory and quantification

John Smith
  • 51
2 votes
0 answers
33 views

Why is $\langle a,b,c,d\mid abcda^{-1}b^{-1}c^{-1}d^{-1}\rangle\cong \langle a,b,c,d\mid aba^{-1}b^{-1}cdc^{-1}d^{-1}\rangle$?

Shaun
  • 41.4k
2 votes
3 answers
38 views

Why is the green theta angle actually equal to theta for the Inscribed Angle Theorem?

John Omielan
  • 42.4k
0 votes
0 answers
29 views

When is "being ambient isotopic" for embeddings and for subsets an equivalence relation?

John
  • 3,246
0 votes
1 answer
24 views

Prove the Fourier Transform of $f(x-x_{o})$ is $F(\omega)e^{-j \omega x_{o}}$

Eugene
  • 1,405
0 votes
0 answers
19 views

Equality using Euler product formula

Karl
  • 659
0 votes
1 answer
13 views

A question in Homotopy of morphisms of Category of complexes of R-modules

FShrike
  • 20k
0 votes
0 answers
8 views

How would one prove Unistable shape - or demonstrate Unistability in software/math?

NoBugs
  • 151
1 vote
0 answers
14 views

Generating set for the space of real valued functions

Solarflare0
  • 1,037
2 votes
1 answer
138 views

Laurent series and Weierstrass zeta function

M.C.
  • 2,099
0 votes
0 answers
5 views

Combining Interpolation Techniques

Tjommen
  • 1
0 votes
0 answers
5 views

Proof clarification of hausdorff measure equals lebesgue measure in one dimension

Franlezana
  • 79
2 votes
0 answers
28 views

Relation algebras and quantifier rank

John Smith
  • 51
0 votes
0 answers
71 views

How to prove Bead-Sort is correct?

Hugh Mann
  • 27
0 votes
0 answers
11 views

Proof that the Krull dimension of a ring R equals the dimension of Spec(R)

Hey
  • 29
0 votes
1 answer
12 views

Linear programming: Check if this base is feasible

Sergey Zaitsev
  • 667
0 votes
0 answers
4 views

DeRham complex for $ad(P)$-valued forms

FUUNK1000
  • 787
0 votes
0 answers
19 views

In categories with zero objects: completeness $\Leftrightarrow$ cocompleteness?

Jos van Nieuwman
  • 1,890
0 votes
1 answer
18 views

Lower Bound on Number of Edges in a Simple Graph

Igor Rivin
  • 25.2k
0 votes
0 answers
3 views

Derivation of the analytical solution for conditional mutual information

ajl123
  • 155
0 votes
0 answers
10 views

How to find the probability of going from node i to node j in t steps in a graph?

RobPratt
  • 38.5k
3 votes
0 answers
21 views

References for the Euler function $\prod_{k=1}^\infty{(1-q^k)}$

Blue
  • 71.8k
1 vote
1 answer
20 views

A (Poincare?) inequality on $L^1$ space

LL 3.14
  • 8,765
2 votes
0 answers
38 views

Galois Group of $p(x)=x^{5}+x^{4}+1$

NC Sapphire Gaming
  • 61
1 vote
0 answers
15 views

Quantitiative weak law of large numbers without higher moments

Object
  • 43
0 votes
0 answers
18 views

Normal distributions from the primes and its generation function

Jean Marie
  • 70.8k
7 votes
3 answers
422 views

Constructing the Haar measure of the $n$-dimensional Torus

Alp Uzman
  • 8,923
4 votes
1 answer
61 views
+150

Finding the maximum cycle of a given set

Apass.Jack
  • 8,912
0 votes
1 answer
12 views

Is the Picard group of a smooth manifold the same as the Picard group of the associated ringed space?

Elías Guisado Villalgordo
  • 1,248
1 vote
0 answers
23 views

Is ${\rm AGL}(nm, 2)$ has a subgroup equivalent as permutaiton group to regular action of $\mathbb{Z}_{2^n}$?

House M.D.
  • 31
6 votes
0 answers
141 views
+100

Will my robot go everywhere? It takes steps of length $1$ and turns left $k$ radians before its $k$th step.

Kevin Dietrich
  • 799
1 vote
0 answers
23 views

Finding domain the unbounded operator $\exp(-H)$ where $H=id/dx$ on $L^2(\mathbb{R})$

Sebastiano
  • 5,873
5 votes
1 answer
57 views

Non-supercuspidal representations are principal series

Kenta S
  • 11.7k
6 votes
0 answers
39 views

Signs of entries of an involutory matrix asymptotically produce a large circular region with hyperbolic sinks. Why?

TheSimpliFire♦
  • 26.5k
2 votes
0 answers
31 views

Bound for the laplacian of a strictly convex function from above by the gradient of it

kumquat
  • 83
0 votes
0 answers
5 views

Series representation of the associated Legendre polynomial

Chris
  • 373
1 vote
0 answers
15 views

Symbolic trigonometry tool for graphically entered triangles

P2000
  • 111
5 votes
0 answers
122 views
+50

Is there a quartic polynomial in two variables that have multiple local minima and no other critical points?

Jap88
  • 1,220
1 vote
0 answers
28 views

Adapted continuous process is locally bounded

AlmostSureUser
  • 1,068
3 votes
1 answer
53 views

Satisfiability of Divisible Group Axioms

Andreas Blass
  • 68.6k
0 votes
2 answers
636 views

Parabola equation from two points and vertex

amWhy
  • 206k
2 votes
1 answer
18 views

Understanding a given proof for the identity theorem of analytic functions: Why do $f_1$ and $f_2$ agree on a neighbourhood of an accumulation point

Martin Argerami
  • 190k
2 votes
0 answers
26 views

Is it a true hyperbolic icosahedron?

Oscar Lanzi
  • 32.6k
0 votes
1 answer
14 views

All graphs that are subgraphs of a fixed Graph $G$ is in $P$ or in NPC?

Shiva Venkata
  • 1,169
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