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Interesting 40 Bountied Hot Week Month
0 votes
1 answer
9 views

Trying to solve $|2x-15| = -x^2 - 5x -8$

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Átila Correia
  • 7,924
1 vote
1 answer
13 views

Supremum norm of a function whose Fourier transform is in weighted $L_2$

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Ryszard Szwarc
  • 6,277
0 votes
0 answers
2 views

A specific binomial summation identity

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Math_Day
  • 1,135
2 votes
1 answer
40 views

Question regarding the definition of a functional

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Nike Dattani
  • 1,020
0 votes
0 answers
7 views

Reasoing behing dividing by time to get the tangent vector from the difference in the position vector

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Paracetamol
  • 497
0 votes
0 answers
4 views

Limit of $t_ne^{-at_n}$, where $t_n$ is a divergent sequence and $a>0$

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Koizo
  • 33
0 votes
0 answers
7 views

Is \varprod the same as $\prod$?

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CBBAM
  • 1,370
2 votes
0 answers
30 views

Define $g(x) = \frac{ f(x)}{f(f(x))}$. Prove or. disprove: If $g$ is unbounded then $\sum 1/f(n)$ diverges.

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aaa bbb
  • 190
0 votes
0 answers
3 views

Underdetermined Lagrange multipliers system

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Aubergine
  • 101
-1 votes
1 answer
38 views

Probability of having lung cancer for smokers

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Stenli
  • 1
0 votes
0 answers
10 views

Tiling a board (recursion)

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Mark Saving
  • 21.1k
3 votes
2 answers
47 views

How to integrate $\int x'(t)\ dx(t)$ and similar?

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mohamedshawky
  • 300
0 votes
0 answers
10 views

Determinant of a skew-symmetric determinant

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Math_Day
  • 1,135
3 votes
2 answers
54 views

Pinocchio logic test

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Brian Tung
  • 31.3k
0 votes
0 answers
8 views

Show $\mu \ge x (1 - F(x))$ for $x \in [0,1]$

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user789100
  • 131
2 votes
0 answers
10 views

Why do prime factors of odd term Lucas numbers only end in 1 or 9?

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littletimer
  • 63
0 votes
1 answer
25 views

Uniform convergence of a series of functions (M-test)

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RRL
  • 84.6k
0 votes
0 answers
3 views

Question regarding pseudocode of the Simplex algorithm

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3nondatur
  • 2,502
0 votes
1 answer
30 views

Regularization (Baysian approach with Map estimate)

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golupolu
  • 1
0 votes
0 answers
10 views

Region of a double integral and Fubini's Theorem

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user862535
  • 11
0 votes
1 answer
23 views

Linear operator mapping Hilbert space to its subspace is bounded?

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Ryszard Szwarc
  • 6,277
-2 votes
0 answers
20 views

How do you prove the following theorems involving trapezoid areas split up by diagonals?

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user2661923
  • 23.4k
1 vote
0 answers
19 views

Vector space with exactly one basis

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Seeker
  • 81
1 vote
0 answers
10 views

What is the trace of the square of the matrix $T_{ij}=t_{i-j}$, with $t_k=t_{-k}=c^k/k$?

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Thomas
  • 29
1 vote
0 answers
13 views

Finding the principal root of a finite summation of sines with amplitudes equal to their frequencies.

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zcsttn
  • 11
0 votes
1 answer
34 views

Bridge theory probability of distribution

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Robert Shore
  • 17.2k
0 votes
0 answers
10 views

Infinite product expression of partition function

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mjc
  • 1,509
0 votes
0 answers
7 views

Eigenvalues for a boundary value problem

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Karima
  • 1
1 vote
1 answer
28 views

Certain property of the quotient ring related to polynomial rings and fields

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preferred_anon
  • 16.3k
0 votes
0 answers
39 views

Solve $u_t=2u_{xx}+t\sin(x)$

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George Tsoutsinos
  • 558
0 votes
0 answers
12 views

How to find all singularities?

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Andres2003
  • 183
4 votes
1 answer
83 views

Proofs for couple of details when proving that $n^7 + 7$ is not a perfect square for any integer $n$.

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Mike
  • 16.1k
0 votes
0 answers
17 views

How can I calculate at which distance a moving object stops in this physics emulation?

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Mostofus
  • 1
1 vote
0 answers
13 views

Does the generalized homology represented by the sphere spectrum give the stable homotopy groups on suspension spectra of pointed spaces?

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Indraneel Tambe
  • 1,315
3 votes
1 answer
137 views

A B-topological ring that is not semi-topological?

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Jacob Manaker
  • 7,784
1 vote
0 answers
38 views

Subgroup generated by subgroups $\langle A_1,B_1\rangle$ and $\langle A_2,B_2\rangle$

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Shaun
  • 38.6k
1 vote
0 answers
50 views

How to interpret an identity like $\sin(A+B) ≡ \sin(A)\cos(B)+\cos(A)\sin(B)$ using quantifiers?

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FShrike
  • 10.5k
1 vote
0 answers
8 views

How to simplify this linear program using symmetries?

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user1936752
  • 1,558
1 vote
1 answer
17 views

Action on identity in crossed modules

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fitzcarraldo
  • 1,201
0 votes
2 answers
54 views

Circle function is bijective and continuous but not a homeomorphism

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DanielWainfleet
  • 53.9k
0 votes
0 answers
17 views

Probability of Drawing A Function with a Specific Value in the set $\mathbb{Z}/n\mathbb{Z}$

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Just Asking A Question
  • 1
0 votes
0 answers
22 views

$y''+y=x^2+1, y(\pi)=\pi^2, y'(\pi)=2\pi$ - By Laplace Transform

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Quiet_waters
  • 1,271
0 votes
0 answers
8 views

Positivity and Negativity of Cumulants

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Andrew
  • 429
1 vote
0 answers
16 views

Why can we go from composition of functions to products in this proof about convolutions?

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MathFan
  • 328
1 vote
0 answers
36 views

Proving the second statement regarding ellipse using the first one or without it

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Paracetamol
  • 497
2 votes
0 answers
26 views

Residue of $ze^{\frac{1}{z-1}}$

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Christophe Leuridan
  • 2,930
1 vote
0 answers
32 views

Rewriting quadratic optimization problem with negative definite matrix

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user35083
  • 71
0 votes
0 answers
13 views

Projection of $S^3$ on $S^5$ in their fiber bundle

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Sammy Black
  • 17.5k
0 votes
1 answer
9 views

Inequality in Cauchy criterion for Real-valued series.

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David C. Ullrich
  • 84.8k
1 vote
1 answer
25 views

Find the equation of the tangent line in the form $y=mx+c$. Compute $m$ and $c$.

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Math Jack
  • 11
0 votes
0 answers
15 views

Cohomology operations are group homomorphisms

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Descartes Before the Horse
  • 6,540
2 votes
1 answer
205 views

$\mathcal{K}(\mathcal{H})$ is separable?

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Glorfindel
  • 3,929
0 votes
0 answers
12 views

Is there a name for smooth map $\Pi:M\to\mathcal{L}(R^l)$ such that $\Pi(p)$ is an orthogonal projection and $\dim\Pi(p)$ is constant for all$p\in M$?

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rfloc
  • 689
0 votes
0 answers
33 views

$\lim_{r\to\infty} \int \cos^2(rz + t)\, d\pi_{\#}\mu(z) = \frac12$ for all $t\in \Bbb R$

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heroic-harmonic
  • 10.5k
0 votes
0 answers
13 views

Import/export file text into GeoGebra

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Chess
  • 147
4 votes
2 answers
62 views

How can Line Integrals over a vector field be visualized mathematically?

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Sammy Black
  • 17.5k
0 votes
0 answers
5 views

How to use OR/SVD to approximate a vector

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Toffe1369
  • 33
0 votes
0 answers
5 views

Convert H-representation of convex polytope to $V$ representation?

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Kaind
  • 2,165
0 votes
1 answer
13 views

Collection of domain of a set of functions

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Mark Saving
  • 21.1k
0 votes
0 answers
17 views

Find initial conidtion in order for the solution to be periodic

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xpaul
  • 35.5k
0 votes
0 answers
25 views

Let $f(x)=0$ for $x\leq 1$ and $f(x)=1$ for $x>1$. Let $F(x)=\int_0^x f$. How do we explain that $F'$ is not defined at $1$?

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evianpring
  • 2,107
0 votes
0 answers
13 views

Proof verification for a theorem about a harmonic function on the unit disc

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Jean Marie
  • 66k
0 votes
0 answers
6 views

Prove that column indices of pivot columns of a matrix in reduced row echelon form are always greater than row indices

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Samuel Adrian Antz
  • 617
1 vote
1 answer
33 views

Finding the biggest $k\leq k_0$ such that the interval $k[A, B]$ contains an integer

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ploosu2
  • 6,924
1 vote
0 answers
13 views

Order statistics of exponential distribution when their summation is given

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Snoop
  • 8,751
0 votes
0 answers
13 views

Trigonometric problem in solving a PDE

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Jonne
  • 215
0 votes
0 answers
14 views

Will two different points on a 2D surface have same tangent plane?

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Andy
  • 41
1 vote
1 answer
25 views

Integer points in polyhedra

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Ivan Neretin
  • 11.7k
2 votes
0 answers
14 views

Algorithms to Compute Dimension of Lie Algebra

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MathPanda
  • 135
2 votes
0 answers
6 views

Set of Density Operators with Separable Eigenbasis

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Michael Liu
  • 21
0 votes
0 answers
21 views

The largest interval over which the general solution of ODE is defined

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Lutz Lehmann
  • 111k
3 votes
1 answer
24 views

Possible cardinalities for continuity of the identity map with respect to any metrics

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Matemáticos Chibchas
  • 5,921
0 votes
0 answers
10 views

Converting Second Order Linear ODE to Hypergeometric Function

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tumm
  • 1
2 votes
0 answers
20 views

finding a basis for the underlying vector space of the induced representation

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Ergin Süer
  • 3,379
0 votes
2 answers
23 views

Is $C_0(\mathbb{R})\subseteq L^1(\mathbb{R})$?

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Martin R
  • 87.9k
3 votes
0 answers
25 views

Why is $B_{2n}(\frac12+ix)\in\mathbb R$ whenever $x\in\mathbb R$?

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WillG
  • 5,308
-2 votes
2 answers
57 views

prove the definite Integral

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Jeffrey Harkness
  • 21
2 votes
0 answers
637 views

Approximate linear density function for a normal distribution

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Glorfindel
  • 3,929
0 votes
0 answers
13 views

Prove $f^{-1}\left( [-1,\alpha]\right)=\bigcup_{n\in\mathbb{Z}} \left[2\pi n+\cos^{-1}\alpha,2\pi(n+1)-\cos^{-1}\alpha\right]$, with if and only if

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name
  • 101
33 votes
6 answers
6k views

A resource for learning p-adic numbers

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Shaun
  • 38.6k
2 votes
0 answers
12 views

Lie Algebra homomorphism from $\mathfrak{sl}(2,\mathbb{R})$ to $\mathfrak{gl}(m,\mathbb{R})$ is the derivtive of a unique Lie group homomorphism

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maxfried
  • 95
0 votes
0 answers
8 views

How can we determine the number of parabolic lines on 2D surface?

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Andy
  • 41
0 votes
0 answers
8 views

Generalizations of Stein's identity to product of functions of gaussian vector

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WeakLearner
  • 4,363
2 votes
0 answers
6 views

Coset representatives for $wPw^{-1} \cap P' \backslash P'$ for parabolic subgroups $P'$ and $P$?

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D_S
  • 30.9k
0 votes
1 answer
26 views

Finding the basis of a set of vectors.

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Mr.Gandalf Sauron
  • 7,534
1 vote
0 answers
22 views

Is this definition of a converging sequence well-posed?

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Boshi
  • 11
3 votes
0 answers
25 views

A Transylvanian Hungarian MC Problem.

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sonnet pronnet
  • 31
0 votes
1 answer
30 views

Pair of Circles (Non intersecting)

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Narasimham
  • 36.5k
1 vote
0 answers
26 views

Proof in set theory with infinite indices

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David C. Ullrich
  • 84.8k
4 votes
4 answers
380 views

Homomorphic image of modular lattice is modular?

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awoke liyew mekonnen
  • 1
1 vote
0 answers
20 views

Using complex analysis to calculate the radius of convergence of real functions

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Andres2003
  • 183
1 vote
0 answers
13 views

How to perform a matrix rotation of an information matrix

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Prometheus2508
  • 11
1 vote
1 answer
86 views

Showing $\frac{\partial}{\partial \Phi}\left(\Phi\circ\exp(\varphi)\circ\Phi^{-1}\right) = I - C(\Phi)C(\varphi)C(\Phi)^T$ for 3D rotations

user avatar
Andy
  • 25
6 votes
2 answers
3k views

Normal sylow subgroup of a finite group is characteristic

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Shaun
  • 38.6k
1 vote
3 answers
102 views

Does $\sum \limits_{k=1}^{\infty} \frac{\cos(k)-\cos(k+1)}{k}$ converge?

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Mark Viola
  • 166k
4 votes
2 answers
102 views

Unsolvable partial differential equation

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JJacquelin
  • 61.8k
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