Mathematics Stack Exchange

0

votes

1

answer

50

views

Explicit homeomorphism between the plane and the plane minus a closed half-line.

general-topology

answered 2 mins ago William Elliot 7,128

0

votes

2

answers

25

views

Number of possible bishop moves on an $nxm$ chessboard

binomial-coefficients closed-form chessboard

answered 3 mins ago bof 50.1k

0

votes

0

answers

2

views

Why are weak topologies useful in functional analysis?

functional-analysis topological-vector-spaces weak-topology

asked 4 mins ago user8469759 1,336

-2

votes

0

answers

6

views

Can anybody provide me the ans as well as the solution to this below problem?

limits derivatives

asked 4 mins ago Sanchayan Bhowmik 1

2

votes

1

answer

86

views

What is anti-derivative of this function?

calculus integration complex-analysis analysis special-functions

answered 5 mins ago JJacquelin 42.5k

1

vote

0

answers

9

views

How to solve $1+\sum_{k=1}^r 3^k\binom{n}{k}$ so that I could use $ S\{n\} = \frac{a_1(1-r^n)}{1-r} $ for large $r$?

combinatorics summation binomial-coefficients

modified 6 mins ago Shaun 8,582

-1

votes

1

answer

26

views

Tail of rotated vector not properly defined using Rodrigues' rotation formula

rotations

answered 7 mins ago amd 29k

0

votes

1

answer

10

views

If $\cos(x) = \sin(y)-\cos(z)$, prove that $xyz=\frac{\pi}{2}$

trigonometry

answered 7 mins ago Kavi Rama Murthy 49.4k

2

votes

0

answers

16

views

Any finite dimensional normed linear space over a complete field is complete.

functional-analysis self-learning normed-spaces

modified 9 mins ago Mike 1,189

2

votes

0

answers

44

views

+50

Bounding integer coefficient polynomials with constant term $0$ in the region $(-1,1)$

real-analysis polynomials

modified 11 mins ago Haran 718

0

votes

0

answers

2

views

Distance of a point (inside) circle with arbitrary direction

geometry trigonometry euclidean-geometry

asked 12 mins ago DOOM 184

2

votes

0

answers

13

views

A good book to learn graph algorithms

graph-theory reference-request book-recommendation coding-theory online-resources

modified 13 mins ago Shaun 8,582

2

votes

0

answers

14

views

How are zeros of a global analytic function defined? Are they isolated?

complex-analysis analysis reference-request definition

modified 14 mins ago Rama 11

0

votes

0

answers

11

views

Given a Multivariate Quotient Ring, can one find a Monoid ring with the same properties?

abstract-algebra

modified 16 mins ago Jyrki Lahtonen 108k

0

votes

1

answer

78

views

There are at least 2 vertex-disjoint paths between every pair of vertices?

discrete-mathematics graph-theory trees

modified 16 mins ago Old Pro 280

4

votes

0

answers

715

views

Converse of Beltrami-Enneper theorems

differential-geometry

modified 20 mins ago Narasimham 20.6k

1

vote

1

answer

2k

views

distance from a point to a subspace spanned by a set of vectors

linear-algebra

modified 25 mins ago Community♦ 1

2

votes

0

answers

22

views

Why is Urysohn's metrization theorem so much more “popular” than the Nagata–Smirnov metrization theorem?

general-topology soft-question

modified 33 mins ago MathematicsStudent1122 8,161

2

votes

1

answer

17

views

minimum value of $I(l)$ in definite integration

definite-integrals

answered 33 mins ago Kemono Chen 2,470

2

votes

0

answers

8

views

What is the source of formal descriptions for large uncomputable ordinals clockable by Infinite Time Turing Machines?

logic automata ordinals turing-machines

modified 38 mins ago Shaun 8,582

0

votes

0

answers

14

views

Contour for $\int_0^\infty \arctan(z) e^{-z^2}\,dz$ or some variant

integration complex-analysis definite-integrals contour-integration complex-integration

modified 38 mins ago Zachary 2,289

0

votes

1

answer

45

views

Infinum of exponential function

real-analysis exponential-function supremum-and-infimum

answered 39 mins ago Kavi Rama Murthy 49.4k

-1

votes

1

answer

53

views

How to convert $(tx^2+c)^\frac{1}{2}$ into polynomial form?

algebra-precalculus polynomials

answered 51 mins ago Alejandro Nasif Salum 4,294

0

votes

0

answers

11

views

Is there an algorithm to find the lengths of all paths from a given vertice that can run in polynomial time?

graph-theory algorithms computational-complexity

asked 59 mins ago Aryaman Gupta 1

-1

votes

0

answers

20

views

Inequality of matrix infty-norm: Does $\|(I - L)^{-1}U\|_{\infty} \leq \|H\|_{\infty} < 1?$

inequality matrix-decomposition conjectures matrix-norms

modified 59 mins ago Shaun 8,582

1

vote

0

answers

5

views

Inferring observation time from a Brownian motion

brownian-motion statistical-inference bayesian

asked 1 hour ago J. Doe 6

-1

votes

2

answers

33

views

value of algebric expression

algebra-precalculus factoring

modified 1 hour ago Michael Rozenberg 95.5k

1

vote

2

answers

30

views

How many ordered sets there are with k elements (with limitation )

combinatorics discrete-mathematics

answered 1 hour ago Riley 139

2

votes

1

answer

23

views

If $(X,\|.\|_)$ is complete and $\|.\|_{} \leq \|.\|_{}$, then is $(X,\|.\|_{})$ complete?

functional-analysis normed-spaces complete-spaces

modified 1 hour ago Kavi Rama Murthy 49.4k

1

vote

0

answers

11

views

Proving an infinite product for generating function

combinatorics generating-functions

asked 1 hour ago Jimmy2Goons 153

0

votes

1

answer

17

views

A question about variance-covariance matrix.

statistics random-variables covariance

modified 1 hour ago Alejandro Nasif Salum 4,294

0

votes

0

answers

8

views

For row reduced echelon matrix for a homogeneous system of equations, what solution would be there for r=n and r>n

linear-algebra matrices homogeneous-equation

asked 1 hour ago dheeraj suthar 1

3

votes

1

answer

80

views

+50

Why is it Euler's 'Totient' Function?

number-theory math-history

modified 1 hour ago Haran 763

0

votes

1

answer

22

views

Angles of convex polygons

angle convex-geometry

modified 1 hour ago mathhero 14

1

vote

1

answer

346

views

Proof that $L^p$ functions define tempered distributons

distribution-theory schwartz-space

answered 1 hour ago Rahul Raju Pattar 354

1

vote

1

answer

1k

views

associated homogeneous linear differential equations

differential-equations differential homogeneous-equation

modified 1 hour ago Community♦ 1

0

votes

2

answers

40

views

orthogonal projection of a vector onto a plane

linear-algebra projection

modified 1 hour ago Kavi Rama Murthy 49.4k

2

votes

2

answers

49

views

Are topologies induced by following families of seminorms same?

functional-analysis pde fourier-analysis

answered 1 hour ago Xiao 4,697

0

votes

1

answer

14

views

Probability of 2nd ball chosen is Red

probability conditional-probability

answered 1 hour ago Henno Brandsma 104k

3

votes

0

answers

90

views

Show that $\mathbb{Z} = \langle a, b \mid a^{12} = b,\ ab = ba \rangle$ has dead end elements

group-theory geometric-group-theory group-presentation finitely-generated

modified 1 hour ago Shaun 8,582

1

vote

0

answers

13

views

Splitting up compound inequalities of multiple variables

sequences-and-series inequality summation

modified 1 hour ago Shaun 8,582

0

votes

1

answer

38

views

Linear regression analysis where the fit values must be greater than the observed values?

curves linear-regression

modified 1 hour ago burlyhab 1

-1

votes

1

answer

15

views

Mth_probability

probability

answered 1 hour ago Monika_j22 1

0

votes

1

answer

38

views

Let $\aleph_\alpha$ be a singular cardinal and $2^{\aleph_\xi}=\aleph_\beta$ for all $\xi<\alpha$. Then $2^{\aleph_\alpha}=\aleph_\beta$

elementary-set-theory proof-explanation cardinals

answered 1 hour ago Henno Brandsma 104k

0

votes

1

answer

27

views

A clarification about Fubini's theorem 2

real-analysis probability integration

answered 1 hour ago Alejandro Nasif Salum 4,294

2

votes

0

answers

31

views

Calculating moments of a function of independent Gaussians

probability-distributions logarithms taylor-expansion normal-distribution exponential-sum

modified 1 hour ago Hudson Cooper 11

3

votes

1

answer

40

views

I don't understand the meaning of “trace” in this context

general-topology notation terminology

modified 1 hour ago Shaun 8,582

0

votes

0

answers

34

views

Determine the quadratic residues $QR_{85}$.

abstract-algebra quadratic-residues

modified 1 hour ago Shaun 8,582

0

votes

0

answers

28

views

Generating Symmetric Group with Transpositions

combinatorics symmetric-groups finitely-generated involutions

modified 2 hours ago Shaun 8,582

2

votes

2

answers

32

views

Thorem stating how much of a population is within n standard deviations from the mean

probability-distributions standard-deviation

modified 2 hours ago Alejandro Nasif Salum 4,294

0

votes

1

answer

13

views

Forms on vector bundles: vertically compactly supported

general-topology algebraic-topology differential-topology vector-bundles de-rham-cohomology

answered 2 hours ago Aweygan 13.4k

0

votes

1

answer

9

views

Trail Mixed Packaging problem part 1.3

linear-algebra

answered 2 hours ago John Doe 9,774

1

vote

0

answers

9

views

Connected Smooth Projective curve $C$ is rational if unirational

algebraic-geometry algebraic-curves projective-schemes

asked 2 hours ago Tim Grosskreutz 149

2

votes

1

answer

52

views

Weird solution to an integral equation

calculus integration integral-equations

modified 2 hours ago dmtri 1,380

-1

votes

1

answer

12

views

Prove that if $nm ≤ nx < nm + n $, such that $ n,m ∈ ℤ $ and $ x ∈ ℝ$, then there exists …

algebra-precalculus functions discrete-mathematics floor-function

modified 2 hours ago Lucas Henrique 892

1

vote

0

answers

11

views

A minimizing property of the Sphere?

maxima-minima average spheres minimal-surfaces

asked 2 hours ago user86742 6

-1

votes

0

answers

9

views

If (p,q,r) is the point in D, what is the biggest q？（detail is below）

geometry

modified 2 hours ago dantopa 6,411

1

vote

0

answers

9

views

Unramified Extensions of Discrete Valuation Rings

algebraic-geometry ring-theory commutative-algebra

asked 2 hours ago KarlPeter 588

3

votes

0

answers

47

views

Prove that this function is a contraction

calculus functions contraction-operator

modified 3 hours ago Naj Kamp 117

0

votes

1

answer

33

views

Heat equation on complex plane

complex-analysis differential-equations

answered 3 hours ago Infinitus 78

0

votes

0

answers

13

views

interpreting sound curves as sinogramms

fourier-analysis

modified 3 hours ago vectory 1

0

votes

0

answers

11

views

Finiteness of regular planar simple graphs with their faces bounded by cycles of the same length

graph-theory planar-graph

modified 3 hours ago David Molano 1,426

3

votes

1

answer

58

views

Find most even trisection of a tree graph in O(n log n) time

graph-theory optimization algorithms trees set-partition

modified 3 hours ago Old Pro 278

0

votes

0

answers

4

views

Convergence of row superposition of null array to Poisson point process

probability-limit-theorems point-processes

modified 3 hours ago Meagler 1

1

vote

1

answer

25

views

If $\overline{M}=A\oplus B$ what can be said about $M$'s decomposability?

general-topology functional-analysis operator-theory banach-spaces projection

answered 3 hours ago Martin Argerami 124k

5

votes

1

answer

83

views

How to give formal proof in logic?

proof-verification logic proof-writing first-order-logic model-theory

modified 3 hours ago spaceisdarkgreen 32.3k

2

votes

1

answer

18

views

On a version of Urysohn lemma for complete metric spaces, involving uniform continuous functions

general-topology metric-spaces uniform-continuity complete-spaces

answered 3 hours ago Andreas Blass 49.1k

2

votes

1

answer

28

views

Example which shows that the following inequality is sharp

linear-algebra functional-analysis operator-theory

answered 3 hours ago Martin Argerami 124k

1

vote

0

answers

18

views

Understandin kernel, image and cokernel of a map

abstract-algebra matrices

asked 3 hours ago BOlivianoperuano84 145

2

votes

1

answer

15

views

Reduct of a first-order structure

logic first-order-logic model-theory

answered 3 hours ago Noah Schweber 121k

0

votes

2

answers

80

views

Two different solutions of $\int\frac{1}{1+x} dx$

calculus integration

modified 3 hours ago user587192 1,723

0

votes

1

answer

29

views

Linear equations with modulus

linear-algebra

answered 3 hours ago mouthetics 99

12

votes

1

answer

138

views

+100

Total rotation of a circle (or other closed curve) when 'rolled' along a curve in $\mathbb{R}^2$

differential-geometry curvature

modified 4 hours ago alex.jordan 38.5k

1

vote

1

answer

21

views

Do we have $BTT^B^=B^TT^B$ when $T$ is closed and $B$ is normal?

functional-analysis operator-theory adjoint-operators

answered 4 hours ago Martin Argerami 124k

1

vote

1

answer

22

views

Adapted charts for smooth manifold

general-topology differential-geometry smooth-manifolds smooth-functions

answered 4 hours ago CL. 2,105

3

votes

0

answers

19

views

Is strong topology on a W*-algebra a dual topology?

functional-analysis operator-theory von-neumann-algebras

modified 4 hours ago Junekey Jeon 181

0

votes

0

answers

34

views

Is my computation of the second derivative of a mean square error right?

multivariable-calculus derivatives

modified 4 hours ago Sherwin Chen 58

5

votes

2

answers

60

views

Uniqueness of a parabolic-like PDE

pde parabolic-pde

modified 4 hours ago user254433 2,481

0

votes

1

answer

16

views

How to prove: Two solutions to pairwise known distances transformed either by rotation+translation or reflection+translation?

geometry optimization proof-writing linear-transformations classical-mechanics

answered 4 hours ago Nominal Animal 6,750

1

vote

0

answers

15

views

What is the best method to use to find the root of a log shaped function?

roots newton-raphson

asked 4 hours ago dacfer 78

1

vote

0

answers

14

views

learning to solve inhomogeneous versions of Legendre, Hermite, Laguerre etc.

differential-equations special-functions book-recommendation

modified 4 hours ago amWhy 191k

0

votes

0

answers

21

views

statistical analysis

analysis statistics percentages

asked 5 hours ago Shivo 1

1

vote

0

answers

40

views

The Distribution of Weird Numbers in the Natural Numbers

number-theory real-numbers

asked 5 hours ago Gnumbertester 6

0

votes

0

answers

14

views

Maximal analytically continued domain

complex-analysis analytic-continuation

asked 5 hours ago Hans 4,945

0

votes

1

answer

16

views

Having Problem changing fraction with Binomial Denominator into a Mixed Expression

algebra-precalculus fractions

answered 5 hours ago Siong Thye Goh 98.9k

1

vote

1

answer

24

views

Confusion with binomial factorization

polynomials quadratics factoring

answered 6 hours ago Larry 1,608

0

votes

0

answers

8

views

Define a monoalphabetic substitution cipher and describe why it results in a bad degree of security

cryptography

asked 6 hours ago princetongirl818 80

4

votes

0

answers

61

views

Concerning the subalgebra generated by two elements

algebraic-geometry polynomials commutative-algebra resultant

modified 6 hours ago user237522 2,109

1

vote

0

answers

17

views

Galois Action on Coherent Sheaves Exact Functor

sheaf-theory galois-cohomology projective-varieties

modified 6 hours ago KarlPeter 588

1

vote

0

answers

7

views

Abelian category in which every double chain is stationary, is an AB5 category?

abelian-categories

asked 6 hours ago A. Lane 6

1

vote

0

answers

12

views

If $(X_t)_{t\ge0}$ is a Markov process with invariant measure $\mu$, does the distribution of $X_t$ weakly converge to $\mu$ as $t\to\infty$?

probability-theory measure-theory stochastic-processes markov-process stochastic-analysis

asked 6 hours ago 0xbadf00d 1,809

0

votes

0

answers

13

views

Ways to extract n items in groups of variable size of max k items

combinatorics

asked 7 hours ago GigiSan 101

0

votes

0

answers

10

views

Obtaining depth to an object of known dimensions from a monocular calibrated camera

computer-vision

asked 7 hours ago Mr. Fegur 517

0

votes

1

answer

28

views

Prove that each $B_n$ is empty for $1 \leq n \leq n_0$

real-analysis continuity metric-spaces

modified 8 hours ago user3482749 2,381

5

votes

0

answers

33

views

Cartier divisor $\mathbb{Q}$-trivial

algebraic-geometry commutative-algebra

asked 8 hours ago Wei 31

2

votes

2

answers

183

views

When does the tensor product distribute over an infinite direct product?

abstract-algebra modules tensor-products infinite-product

modified 8 hours ago user26857 39.2k

Explore Our Questions