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2

votes

1

answer

21

views

Finding real affine change of coordinates efficiently

algebraic-geometry

answered 2 mins ago KReiser 25.8k

1

vote

0

answers

16

views

Finding the length of a chord in two parts

geometry circles

modified 2 mins ago Monica Sanders 33

1

vote

0

answers

19

views

Convergence in $L^p$ implies convergence in weighted $L^p$

functional-analysis measure-theory lp-spaces

modified 2 mins ago Danilo Gregorin 1,521

0

votes

0

answers

4

views

How to determine if a formula is equivalent to a logical axiom?

logic propositional-calculus first-order-logic predicate-logic axioms

asked 2 mins ago user5345345 309

1

vote

1

answer

22

views

Transforming Hilbert-style Axiom Systems for Classical Propositional Logic and Retaining Soundness and Completeness

logic propositional-calculus axioms hilbert-calculus

answered 3 mins ago JoeSmith123 11

0

votes

0

answers

2

views

upper-bound of a Volterra-type integral?

real-analysis functional-analysis analysis delay-differential-equations

asked 5 mins ago user775349 21

0

votes

1

answer

12

views

Question on Quiver morphisms.

category-theory

modified 5 mins ago EBP 952

0

votes

0

answers

5

views

range of variation for a conditional entropy

entropy

modified 7 mins ago Saket Gurjar 1,402

0

votes

0

answers

7

views

Is there a meaningful additive risk measure

random-variables operations-research risk-assessment decision-problems

asked 9 mins ago MB7800 1

0

votes

2

answers

16

views

From a point perpendicular tangents are drawn on the ellipse $x^2+2y^2=2$. The chord of contact touches a circle concentric with ellipse…

conic-sections

answered 10 mins ago amd 45.5k

0

votes

0

answers

16

views

Schrödinger Equation problem

physics mathematical-physics

modified 12 mins ago Bernard 148k

2

votes

0

answers

14

views

Pullback of intersection of two subobjects

category-theory sheaf-theory topos-theory pullback

modified 12 mins ago Shaun 22.9k

0

votes

0

answers

13

views

Probability Distribution problem {0, 1}

probability probability-theory discrete-mathematics probability-distributions uniform-distribution

asked 13 mins ago OscarTheMighty 29

1

vote

5

answers

22

views

Find points where the plane $6x+y+9z=54$ intersects each coordinate axis.

calculus vector-spaces

answered 14 mins ago fleablood 96.2k

1

vote

1

answer

18

views

Question about the definition of the arc length of the graph of a function

real-analysis arc-length

modified 15 mins ago PythonSage 829

0

votes

0

answers

5

views

Find continuous martingale, such that it's quadratic variation is a deterministic continuous function

stochastic-processes stochastic-calculus stochastic-integrals

modified 15 mins ago user408858 800

0

votes

0

answers

13

views

$0 \leq a \leq b \implies \sqrt{a}\leq \sqrt{b}$ in $C^*$-algebras

functional-analysis c-star-algebras

asked 16 mins ago user745578 795

0

votes

1

answer

16

views

invertible matrices and demensions

matrices

modified 16 mins ago Saket Gurjar 1,402

1

vote

0

answers

15

views

number of closed-loop graphs in square lattice

combinatorics graph-theory puzzle algebraic-graph-theory planar-graphs

modified 17 mins ago lol 153

0

votes

0

answers

17

views

Request for help inverting difficult function (or avoiding inverting said function)

exponential-function inverse-function

modified 18 mins ago The Dixie Flatline 1

0

votes

1

answer

12

views

Recurrent and Transient random walks on integer grids

probability-theory stochastic-processes random-walk binomial-distribution

answered 20 mins ago Michh 797

0

votes

0

answers

7

views

Constructive proof of approximate Brouwer's Fixed Point Theorem for $\Delta^n$ via Sperner's lemma

algebraic-topology proof-explanation fixed-point-theorems constructive-mathematics

asked 21 mins ago ludwigmach 21

0

votes

1

answer

31

views

Use the Laurent series to prove that $\int_{0}^{2 \pi} e^{\cos(t)} \cos(nt-\sin t)\,dt=\frac{2 \pi}{n!}$

integration complex-analysis laurent-series

answered 26 mins ago J.G. 73.6k

1

vote

1

answer

16

views

On the Condition for Hamiltonian Graph

graph-theory hamiltonian-path

answered 26 mins ago Paralyzed_by_Time 213

0

votes

1

answer

11

views

Help finding integer squares in parametric quadratic equation

quadratics parametric

modified 27 mins ago Semen Koltsov 9

1

vote

0

answers

10

views

Inequality for inner product with constraints.

linear-algebra optimization linear-programming

modified 9 secs ago John Tuwim 541

0

votes

1

answer

15

views

To what extent does Goedel's 2nd incompleteness theorem extend?

first-order-logic incompleteness

modified 10 secs ago Noah Schweber 164k

0

votes

0

answers

12

views

Physical interpretations of the antiderivatives in the the Fundamental Theorem of calculus

calculus wave-equation

asked 28 mins ago user45664 608

0

votes

0

answers

29

views

What is the ROC of laplace transform of a finite signal?

laplace-transform

modified 30 mins ago Mohamadhj 1

1

vote

1

answer

31

views

Probability of returning to the origin

probability-theory stochastic-processes

modified 31 mins ago Saket Gurjar 1,402

-1

votes

0

answers

25

views

Finding minimum value when roots are irrational.

quadratics

modified 31 mins ago maveric 2,357

1

vote

0

answers

15

views

Prove that orthocenter of the triangle formed by the arc midpoints of triangle ABC is the incenter of ABC

geometry euclidean-geometry triangles circles

modified 31 mins ago Rick 699

1

vote

3

answers

24

views

What does it mean when |z| = 2 is the curve in a contour integral?

complex-analysis

modified 31 mins ago Saket Gurjar 1,402

0

votes

0

answers

20

views

Number of ordered triples, given upper bounds?

probability combinatorics

modified 32 mins ago Rick 699

2

votes

0

answers

14

views

Finding the number of (real) solutions of polynomials and their location on the x-axis

polynomials arithmetic roots intuition

modified 34 mins ago Rick 699

1

vote

0

answers

15

views

A sum involving fractional parts and prime numbers

number-theory summation prime-numbers proof-explanation fractional-part

asked 34 mins ago victor 21

1

vote

1

answer

38

views

Let $f \colon X \rightarrow X$ continuous. Show that if $X = [0,1]$, then there exists a point $x$ such that $f(x) = x$

general-topology

answered 35 mins ago caffeinemachine 13.6k

1

vote

0

answers

8

views

Matlab - Exact Line Search

optimization matlab

asked 36 mins ago Joe Rakhimov 33

0

votes

1

answer

23

views

Counting: How many ways to choose 5 items from 3 groups, where items in a group are indistinguishable?

probability combinatorics

answered 36 mins ago Stashu Kozlowski 117

2

votes

0

answers

37

views

Are jointly measurable adapted processes relative to natural filtration from right-continous processes, progressively measurable?

measure-theory stochastic-processes

modified 37 mins ago kelvin jhonson 149

2

votes

0

answers

49

views

Harmonic Pendulum

real-analysis ordinary-differential-equations analysis systems-of-equations

modified 38 mins ago Mrcrg 486

0

votes

0

answers

10

views

Entire function with zeroes on real line

complex-analysis entire-functions

asked 39 mins ago kb70145613 311

1

vote

1

answer

10

views

Finding area of a triangle from incircle of a square and given intersection lines.

geometry triangles

modified 41 mins ago Alexey Burdin 2,015

4

votes

1

answer

107

views

+100

Probability that the mean of a sequence of random variables never exceeds a critical value

probability means

modified 43 mins ago VVejalla 2,894

0

votes

4

answers

28

views

How to prove if $(A \cup B) - (A \cap B) = A$ is true, then $B = \emptyset$?

elementary-set-theory proof-writing proof-explanation solution-verification

modified 43 mins ago Andrés E. Caicedo 70.5k

0

votes

0

answers

4

views

Graph Laplacian eigenvectors similarity measures?

linear-algebra eigenvalues-eigenvectors spectral-graph-theory

asked 44 mins ago thedeathstar1997 15

0

votes

0

answers

14

views

Cantor–Schröder–Bernstein for Lipschitz maps?

reference-request metric-spaces examples-counterexamples lipschitz-functions

asked 44 mins ago Sambo 3,654

3

votes

1

answer

16

views

A variation in the construction of the tensor product of modules

abstract-algebra modules tensor-products

answered 45 mins ago Berci 73.2k

1

vote

1

answer

10

views

Volume of truncated pyramid triangle base

geometry

modified 48 mins ago Harish Chandra Rajpoot 32k

3

votes

1

answer

36

views

How to construct the matrix of a 2-D system of differential equations

ordinary-differential-equations systems-of-equations approximation-theory linear-approximation

answered 53 mins ago E.Nole 802

1

vote

0

answers

47

views

A question about functional analysis.

functional-analysis

modified 55 mins ago user780498 29

0

votes

0

answers

18

views

Geometry equations

geometry

asked 59 mins ago tibi 11

0

votes

0

answers

15

views

Find the area inside the outer loop and the outside the inner loop of the limacon $r=6\cos(\theta)-3$

calculus parametric

modified 1 hour ago adnyu.js 1

0

votes

0

answers

15

views

Least-squares matrix exponential

least-squares

modified 1 hour ago Electer 1

0

votes

0

answers

4

views

Calculate coordinates of polygon's points after changing lenght of one side

vector-spaces coordinate-systems polygons

asked 1 hour ago MineFuf LP 1

0

votes

0

answers

21

views

Integrate $\int_0^{2\pi} \frac{(\cos^2{x})^{2-\beta}}{(1+\alpha \cos{x})^{4-\beta}} dx$

integration complex-analysis indefinite-integrals contour-integration residue-calculus

modified 1 hour ago Warrenmovic 131

2

votes

1

answer

23

views

Number of routes not passing in 3 points

combinatorics

modified 1 hour ago David G. Stork 20.1k

3

votes

1

answer

41

views

What is intuition behind matrix differentiation?

calculus matrix-calculus

answered 1 hour ago Derek O 163

0

votes

0

answers

17

views

Polynomial such that $a\mid p(a)$, for all $a\in\mathbb{R}$, $a\neq 0$. (Problem with divisibility in $\mathbb{R}$.)

polynomials

modified 1 hour ago Bernard 148k

2

votes

1

answer

29

views

Where is the mistake with this conditional expectation calculation?

probability conditional-expectation expected-value

answered 1 hour ago heropup 77.9k

1

vote

0

answers

6

views

Additivization of functors in an abelian monoidal category

category-theory abelian-categories monoidal-categories functors

asked 1 hour ago Isaac Ren 1,299

0

votes

0

answers

18

views

Stewart theorem validity on a sphere

spherical-trigonometry

modified 1 hour ago Narasimham 26.7k

0

votes

0

answers

20

views

Unclear theorem about unitary transformations

linear-algebra quantum-computation unitary-matrices

modified 1 hour ago catalyst 1

0

votes

0

answers

5

views

Conclusion of implicit function theorem in local lie group

complex-analysis lie-groups lie-algebras implicit-function-theorem complex-manifolds

modified 1 hour ago Ibs 162

0

votes

0

answers

4

views

Can a Hamiltonian cycle of an undirected Cayley graph contain inverses of the generating elements?

graph-theory finite-groups hamiltonian-path cayley-graphs hamiltonicity

asked 1 hour ago Buddhini Angelika 611

0

votes

0

answers

24

views

Is there a difference between rolling 3d6 and rerolling lowest twice, versus rolling 5d6 and dropping the two lowest values?

statistics dice

modified 1 hour ago Leucippus 21.9k

0

votes

1

answer

85

views

English translation of Bloch's paper

reference-request set-theory

modified 1 hour ago hermes 14.5k

1

vote

0

answers

10

views

Gradient of a cross product of a vector and second rank tensor

vector-analysis tensors cross-product

asked 1 hour ago Archisman Panigrahi 1,290

0

votes

0

answers

7

views

How do I find the equation of a logarithmic spiral (in polar form) passing through a certain amount of points?

logarithms polar-coordinates regression

asked 1 hour ago Ahmed 1

0

votes

0

answers

15

views

Is my attempt at constructing this homomorphism correct?

abstract-algebra

asked 1 hour ago Patrick Browne 151

1

vote

0

answers

19

views

Dirichlet Test For Convergence Of Improper Integrals

calculus

modified 1 hour ago Michael Hardy 235k

1

vote

2

answers

51

views

Find radius of largest circle within ellipse $\frac{x^2}{9} + \frac{y^2}4 = 1$ with their intersection only at $(3,0)$

geometry contest-math circles conic-sections

modified 1 hour ago Quanto 36.6k

1

vote

1

answer

24

views

Is it true that $u$ is harmonic if and only if $u$ satisfies the mean value property?

integration multivariable-calculus partial-differential-equations harmonic-functions

answered 1 hour ago Ivo Terek 58.4k

2

votes

1

answer

16

views

Why distance function differentiable for sufficiently smooth boundary?

real-analysis derivatives differential-geometry partial-differential-equations elliptic-equations

answered 1 hour ago Angina Seng 133k

0

votes

0

answers

16

views

how do i find the equation of major and minor axis?

linear-algebra algebra-precalculus conic-sections

modified 1 hour ago user376343 5,015

0

votes

0

answers

9

views

Properties of a mapping

polynomials diophantine-equations

asked 1 hour ago thestar 33

1

vote

0

answers

24

views

Complex Ordinary Differential Equations

complex-analysis ordinary-differential-equations complex-integration

modified 1 hour ago Mr. N 425

0

votes

0

answers

17

views

Erreur MAPLE [I did not understand how to solve this problem]

maple

asked 1 hour ago Abdellah El Iraoui 1

0

votes

0

answers

7

views

Getting a Bivariate Polynomial From a Zero-Set

geometry polynomials

asked 1 hour ago wjm 5,639

0

votes

1

answer

23

views

Problems modeling logical

puzzle

answered 1 hour ago Ekin 58

1

vote

0

answers

22

views

Limit, supremum and sets

real-analysis limits continuity solution-verification

asked 2 hours ago RLC 1,182

1

vote

1

answer

12

views

Preimage of multivariable function is convex

analysis multivariable-calculus convex-analysis

answered 2 hours ago copper.hat 144k

0

votes

0

answers

19

views

About the vector space $L(D)$ associated to a divisor

algebraic-geometry algebraic-curves

modified 2 hours ago Bernard 148k

1

vote

1

answer

12

views

Unusual skein relation in HOMFLY polynomial

knot-theory knot-invariants

answered 2 hours ago Kyle Miller 12.6k

0

votes

0

answers

8

views

Is it necessarily that outdegree of every vertex in digraph G(order$\geq 2$) equals 1?

graph-theory

modified 2 hours ago Damascuz 56

0

votes

0

answers

16

views

Additional Clarification on a Question on Lebesgue Outer Measure?

lebesgue-integral lebesgue-measure

modified 2 hours ago Arbuja 66

0

votes

0

answers

5

views

Continuous variable function that evaluates to random curves

random-variables random random-functions

asked 2 hours ago Andreu Heisenberg 25

0

votes

1

answer

42

views

How to simplify $1+w+w^2+w^4+w^5$ by euler’s formula

calculus planar-graphs

modified 2 hours ago user170231 7,222

2

votes

1

answer

24

views

Clarification about Quotient Ring Isomorphism Theorem for a Principal Ideal

ring-theory ideals ring-isomorphism

answered 2 hours ago Carlo 738

0

votes

1

answer

38

views

Cauchy sequence is bounded? (Do we need any element in a sequence to be finite?)

real-analysis sequences-and-series cauchy-sequences

modified 2 hours ago Student 3,241

0

votes

0

answers

38

views

A solution of Diophantine equation: $\big(x+y+z\big)^{3}=27x y z$ with $(x,y)∈Z$

elementary-number-theory

modified 2 hours ago giuseppe mancò 698

5

votes

0

answers

207

views

+500

Help with the proof that $E\subset \mathbb{R}$ with finite perimeter and area has to be equal to the finite union of bounded intervals

functional-analysis geometry analysis geometric-measure-theory

modified 2 hours ago Daniele Tampieri 4,012

1

vote

1

answer

43

views

What English sentences are represented by following expressions?

logic solution-verification

modified 2 hours ago Manx 4,399

1

vote

0

answers

10

views

How to calculate the joint probability: $\Pr \left( \tfrac{g_1}{g_3} \geq \theta_1, \tfrac{g_2}{g_3} \geq \theta_2, g_3 > \theta_3 \right)$?

probability indefinite-integrals density-function exponential-distribution

modified 2 hours ago Raskolnikov 13.6k

0

votes

0

answers

11

views

Linear Programming approach for downtime minimization

optimization linear-programming

asked 3 hours ago alexpwns 1

2

votes

0

answers

8

views

Real analytic set on a compact domain, no zeros on the boundary - isolated points only?

real-analysis systems-of-equations compactness

asked 3 hours ago rudi_ 21

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