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Interesting 53 Bountied Hot Week Month
0 votes
1 answer
51 views

Determine the area of a segment of an ellipse

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Ng Chung Tak
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4 votes
3 answers
129 views
+100

Other ideas or help me understand the answers...

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Ionela Buciu
  • 427
2 votes
2 answers
76 views

Existence of weak solutions of Poisson equations in $\mathbb{R}^{n}$

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Gio67
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1 vote
1 answer
37 views

Probability (expectation)

Agent Smith's user avatar
Agent Smith
  • 444
9 votes
2 answers
699 views

Precise definition of an "algebraic function"

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IV_
  • 6,333
-1 votes
1 answer
28 views

Calculate length of involute without calculus

Jean Marie's user avatar
Jean Marie
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0 votes
0 answers
4 views

Prove remainders

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PerseP
  • 101
1 vote
2 answers
58 views

Analysis and Stability Non Linear System

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D.y.s
  • 521
0 votes
0 answers
45 views
+100

Nonlinear ODE with (pseudo-)spectral method

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Octavius
  • 612
2 votes
1 answer
34 views

Equivalent of complex analysis over the algebraic numbers

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Weier
  • 371
0 votes
0 answers
42 views

Show that $\mathbf{P}(\tau<\infty)=1$

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Kevin
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0 votes
0 answers
4 views

If the sides of triangle are decided by throwing a die thrice the probability that the triangle is a equilateral triangle or isosceles triangle is

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Jhansi
  • 1
0 votes
0 answers
35 views

Sensitivity to noise in nonlinear parameter estimation

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Andy
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0 answers
5 views

Find for each prime $\mathfrak{p}$ in $R = \mathbb{Z}[ \sqrt{−61}] $ a local generator at $\mathfrak{p}$

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Whateverittakes
  • 43
11 votes
0 answers
191 views

Is a function $\mathbb{R}^n \to \mathbb{R}$ which has a closed and connected graph necessarily continuous?

M W's user avatar
M W
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3 votes
1 answer
2k views

Queuing Theory with Poisson Distribution

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CommunityBot
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0 votes
0 answers
3 views

Show that the conditional PMF of i.i.d. r.v.s. given a number of successes

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gmgmgm
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1 vote
0 answers
34 views

$X$ is sub-Gaussian, then $X^2$ is sub-exponential

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jason 1
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1 vote
3 answers
54 views

How to show that two certain chords of a circle passing through the incentre of a given triangle are equal?

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sirous
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1 vote
0 answers
56 views
+500

Why is a certain projective limit of weighted symmetric Fock space, namely $\bigcap\limits_{\tau \in T, p\ge 1 } \mathcal{F}(H_\tau,p)$, separable

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CoffeeArabica
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0 answers
10 views

expression of vector fields

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KAK
  • 43
2 votes
0 answers
35 views

Sylvester matrix without coordinates and its geometry

Arrow's user avatar
Arrow
  • 13.5k
0 votes
0 answers
8 views

Coloring in 2 ways the lattice points of a subset

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Ricky
  • 2,512
0 votes
0 answers
14 views

Verifying Solutions for Quadratic Equations

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Ricky
  • 2,512
0 votes
1 answer
36 views

Find a representation of $(M_n(\mathbb C),tr_n)$

djpesto's user avatar
djpesto
  • 21
6 votes
2 answers
317 views

Why study algebraic varieties over an algebraic closure of the finite field?

Weier's user avatar
Weier
  • 371
1 vote
0 answers
97 views

Prove the equality: $3\cdot5\cdot7\cdot9\cdot11\cdot13\cdot15\cdots=4\cdot4\cdot6\cdot10\cdot12\cdot12\cdot14\cdots$

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SoapEatr
  • 491
0 votes
0 answers
13 views

The cardinality of an algebra

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Yyds
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2 votes
0 answers
26 views
+50

What is a gyrational square in this context?

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HolyKnowing
  • 1,870
1 vote
2 answers
1k views

fast 3D algorithm to find a ray / triangle edge intersection

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CommunityBot
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0 votes
0 answers
44 views

Let $P, Q, R \in \mathbb{R}^3$ be three points not on a line. Prove there is exactly one plane $E \subset \mathbb{R}^3$ containing $P,Q,R$, namely

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Digitallis
  • 3,022
2 votes
1 answer
63 views

With this approximation of $\pi$, will this value always converge?

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Claude Leibovici
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2 votes
0 answers
9 views

Solving a floored recurrence relation $F_n = c \cdot \left\lfloor \frac{F_{n-1}}{d} \right\rfloor$

ryan f's user avatar
ryan f
  • 338
10 votes
3 answers
184 views

$f(xy) = f(x+y)$ : A variation of an old problem

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Mastrem
  • 8,032
-1 votes
0 answers
8 views

What is the symmetric projection orthogonal to a vector?

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Xinna Zhou
  • 1
0 votes
0 answers
23 views

References for Business Calculus with Challenging Problems

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Digitallis
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0 votes
0 answers
18 views

Using the n-roots of unity to do the reduction modulo n

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cansomeonehelpmeout
  • 12.2k
2 votes
2 answers
123 views
+50

Plane through feet of normals to ellipsoid

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zeraoulia rafik
  • 7,031
0 votes
1 answer
32 views

Simultaneous birthday probability. Why is there an $(365-n+1)$?

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Agent Smith
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0 votes
0 answers
20 views

Question on completion of a measures

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Jason Choy
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1 vote
1 answer
32 views

Is it possible to write any arbitrary partial differential equation as an integral equation?

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zeraoulia rafik
  • 7,031
0 votes
0 answers
18 views

Question about domain in 2 dimensional analysis

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AlexF
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1 vote
0 answers
9 views

How to verify ihe Interpolation inequality for the weighted Bessel potential spaces?

Aban's user avatar
Aban
  • 11
1 vote
1 answer
64 views

Proving that $\text{rank}(\phi \circ \psi) \geq \text{rank}(\phi) + \text{rank}(\psi) - n$

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Carlyle
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1 vote
0 answers
15 views

In a normal coordiantes, the determinant of the metric tensor can be viewed as a function of the radial distance function? ( And furthur question )

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Plantation
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0 answers
30 views

Character of an irreducible representation

Jayden's user avatar
Jayden
  • 13
0 votes
0 answers
21 views

Is the projection map from R2 to R a quotient map?

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wroanee faruque
  • 43
0 votes
0 answers
4 views

the first principal component’s variance

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chenqile
  • 23
0 votes
0 answers
19 views

Making a Fourier Transform converge

Strings123's user avatar
Strings123
  • 1
0 votes
1 answer
23 views

What is the difference between a Gaussian random walk and a Gauss-Markov process?

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zeraoulia rafik
  • 7,031
1 vote
1 answer
95 views

Does the following Integral have a solution in elementary functions?

Roland F's user avatar
Roland F
  • 773
1 vote
2 answers
326 views

Almost Sure Convergence for Sample Mean of Bernoullis

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Learning stats by example
  • 162
0 votes
0 answers
23 views

Probability of it raining

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Stefano Barfucci
  • 11
5 votes
1 answer
459 views

Prove that the expression is identically zero.

epi163sqrt's user avatar
epi163sqrt
  • 105k
34 votes
1 answer
1k views
+50

Determining the kernel of a Vandermonde-like matrix

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zeraoulia rafik
  • 7,031
2 votes
1 answer
44 views

If $\omega_f(y) \subseteq \omega_f(x)$ and $int(\omega_f(y)) \neq \varnothing$ then $\omega_f(y) = \omega_f(x)$

M W's user avatar
M W
  • 3,757
0 votes
0 answers
10 views

Decimal exponent

Michael T Chase's user avatar
Michael T Chase
  • 308
0 votes
0 answers
5 views

Symbolizing Definition of Cauchy Sequence with Predicate Logic

Theresa's user avatar
Theresa
  • 1
0 votes
0 answers
9 views

How to recover the strong-type estimate from a weak-type estimate?

zyy's user avatar
zyy
  • 21
0 votes
0 answers
34 views

A problem from the book, "Topics in Algebra" by I.N Herstein from Chapter- 3 (Ring Theory) , Section-3.5, Page number- 140 (2nd Edition)

Thomas Finley's user avatar
Thomas Finley
  • 1,885
2 votes
1 answer
50 views

How can I check whether a point is inside of a plain equilateral shape? (given the center point of the shape and the length of the sides)

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Tony Mathew
  • 1,766
1 vote
0 answers
54 views

Definite Integral $\int \tanh(a\cdot \operatorname{atanh}(x)+b)\,\mathrm dx$

11pro12's user avatar
11pro12
  • 9
5 votes
2 answers
104 views

Finding the angle between vectors

Agent Smith's user avatar
Agent Smith
  • 444
1 vote
1 answer
21 views

How can I create logical OR out of IfTrue, IfFalse, and AND?

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grepgrok
  • 135
0 votes
0 answers
12 views

Question about convergence and divergence of positive series,which means there exists no slowest convergent series.

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Dropsy Zheng
  • 1
2 votes
1 answer
41 views

Limit of composition function

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Soham Saha
  • 98
2 votes
1 answer
38 views

$R$-module structure of tensor product of $R$-algebras (Atiyah-Macdonald)

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Qiaochu Yuan
  • 409k
1 vote
0 answers
64 views

Centraliser of a finite group

scsnm's user avatar
scsnm
  • 1,453
1 vote
1 answer
21 views

Edges of a $K_4$ cannot be too short

Misha Lavrov's user avatar
Misha Lavrov
  • 134k
2 votes
1 answer
50 views

Equivalence relationship defined over membership of a in halo of b. (Non-Standard Analysis, Monads, Halos)

Z. A. K.'s user avatar
Z. A. K.
  • 9,195
2 votes
1 answer
32 views

Let R be a ring with unit element, R not necessarily commutative, such that the only right-ideals of R are (0) and R. Prove that R is a division ring.

Thomas Finley's user avatar
Thomas Finley
  • 1,885
3 votes
1 answer
36 views

Do we have $\log\Gamma(2x+1)-2\log\Gamma(x+1)\ge\log(x^2+1)$ for $x\in[0,1]$?

River Li's user avatar
River Li
  • 33.2k
2 votes
2 answers
93 views

How can two mutually exclusive events be dependent given that they are two results of the same experiment?

ryang's user avatar
ryang
  • 38k
0 votes
1 answer
34 views

Is the function of shortest distance path between two vertex sets convex?

1mdlrjcmed's user avatar
1mdlrjcmed
  • 1,118
1 vote
0 answers
36 views

Strong convergence of compact operator

Ricky's user avatar
Ricky
  • 2,512
1 vote
0 answers
25 views

Derivative of a Matrix equation

Ricky's user avatar
Ricky
  • 2,512
0 votes
0 answers
30 views

A question about S4 modal logic

PW_246's user avatar
PW_246
  • 931
0 votes
0 answers
22 views

What is the norm of the residual in a least squares problem?

Ricky's user avatar
Ricky
  • 2,512
1 vote
0 answers
31 views

In the tower property of algebraic extension, can the "inclusion" hypothesis be removed?

Asigan's user avatar
Asigan
  • 697
0 votes
0 answers
26 views

Conditions on when a connected $n$-manifold can be embedded in $\mathbb R^n$

Ricky's user avatar
Ricky
  • 2,512
3 votes
0 answers
30 views

Ramanujan's identity concerning a quotient of Dedekind's eta functions

Paramanand Singh's user avatar
Paramanand Singh♦
  • 85.2k
1 vote
0 answers
21 views

Meaning of $\mathbb{R}^E$ in graph theory

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Haisaru
  • 301
3 votes
0 answers
49 views

A Series of Integrals like $\sin (x^2)/x^2$

Ricky's user avatar
Ricky
  • 2,512
8 votes
1 answer
3k views

How to prove that nth differences of a sequence of nth powers would be a sequence of $n!$

Ricky's user avatar
Ricky
  • 2,512
0 votes
0 answers
36 views

How to calculate angles in a parallelogram?

Ricky's user avatar
Ricky
  • 2,512
2 votes
0 answers
38 views
+100

Trace convergence of finite dimensional truncations?

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Drew Brady
  • 2,883
1 vote
0 answers
32 views

Matching problem in a recursive way

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Nicolas Agote
  • 846
0 votes
0 answers
17 views

Is sample path of Brownian Motion deterministic?

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Stack_Underflow
  • 189
0 votes
0 answers
12 views

Inequality with nested summations

mza's user avatar
mza
  • 1
1 vote
0 answers
21 views

Interpretation of the analyticity of $Log(z^3)$

Math Goblin's user avatar
Math Goblin
  • 11
1 vote
1 answer
13 views

Combinations subject to constraints

Command Master's user avatar
Command Master
  • 731
0 votes
1 answer
58 views

Why is $\ln(1) \neq \ln(e^{2i\pi})$?

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Gonçalo
  • 4,405
-1 votes
0 answers
18 views

Exponential Growth in Absolute Value of Arithmetic Changes of Arithmetic Changes Phenomenon

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Nicholas Dubois
  • 1
0 votes
0 answers
37 views

Checking my reasoning for $HK/K \cong H/H\cap K$

pyat's user avatar
pyat
  • 49
0 votes
0 answers
36 views

Concatenating consecutive numbers to find primes?

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Bill Dubuque
  • 267k
1 vote
3 answers
970 views

Partial Fraction with Unknown Constants

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