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Interesting 37 Bountied Hot Week Month
0 votes
2 answers
2k views

Complex numbers

Rakshith PL's user avatar
Rakshith PL
  • 372
1 vote
2 answers
149 views

Recurrence of a state in an infinite state space for discrete markov chains

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FD_bfa
  • 4,381
1 vote
1 answer
148 views

Transition derivative for Continuous Time Markov Chains notation

FD_bfa's user avatar
FD_bfa
  • 4,381
1 vote
1 answer
1k views

Prove that the extremity of the polar subtangent of the curve $u+f(\theta)=0$ is $u=f'(\theta+\frac{\pi}{2})$ where $u=\frac{1}{r}$

Community's user avatar
CommunityBot
  • 1
1 vote
1 answer
159 views

Counterintuitive topological result concerning connectedness

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FD_bfa
  • 4,381
0 votes
0 answers
3 views

Birational invariance of the canonical ring for varieties with canonical singularities

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Christopher Nicol
  • 423
0 votes
0 answers
10 views

Is this Exercise has correct?

Knt's user avatar
Knt
  • 1,659
3 votes
1 answer
158 views

What does $\frac{X_n}n$ converge to in distribution for $X_n \sim \chi^2_n$?

FD_bfa's user avatar
FD_bfa
  • 4,381
15 votes
3 answers
441 views

On the Taylor coefficients of $\arcsin^3$

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qifeng618
  • 1,880
0 votes
1 answer
16 views

Is d > n for all d > 2 , where n is the number of digits in the binary representation of d?

Math101's user avatar
Math101
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6 votes
2 answers
88 views

Prove that a triangle with bisectral triangle being a right triangle always has a 120-degree angle

Blue's user avatar
Blue
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1 vote
1 answer
12 views

How to solve a Riccati differential equation that involves a linear 1rst degree one with an integral that can't be calculated with ordinary methods

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Claude Leibovici
  • 270k
0 votes
0 answers
3 views

Ergodicity of Markov shift on natural numbers and his composition.

Waney's user avatar
Waney
  • 624
5 votes
4 answers
279 views

Interesting integration : $\int^1_0\left({\frac{1-x^p}{1-x}-p}\right)\frac{dx}{\ln(x)}$

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whatamidoing
  • 3,596
4 votes
2 answers
2k views

Proving discontinuity by negation of continuity definition

texmex's user avatar
texmex
  • 802
-1 votes
0 answers
20 views

Check whether given sets are closed or open with respect to Discrete metric

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Nandini
  • 1
0 votes
0 answers
13 views

How can I find an invertible function to flatten a probability distribution function into a uniform distribution?

mathreadler's user avatar
mathreadler
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1 vote
1 answer
13 views

Bounds on distance between a point and intersction of convex sets

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Yunfei
  • 165
13 votes
3 answers
1k views

Is it possible to draw this picture without lifting the pen? (I actually want to hang string lights this way in a gazebo without doubling up)

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Oscar Lanzi
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0 votes
0 answers
31 views

$ \operatorname{rot}(\operatorname{rot} A)$ by differential form

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Siderianaut
  • 19
3 votes
1 answer
54 views
+50

Using a Markov Chain to Define a Thunderstorm

Wei's user avatar
Wei
  • 1,289
0 votes
0 answers
6 views

Given a Hecke character on an imaginary quadratic field, what are its values on non-principal ideals?

Hetong Xu's user avatar
Hetong Xu
  • 2,187
1 vote
0 answers
19 views

If $A\pm A = I \leqslant R$ and ideal $I$ of a ring $R$ where $A$ is a subset of $R$, then one element deleted from $a$ does not change that?

Martin Brandenburg's user avatar
Martin Brandenburg
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0 votes
0 answers
10 views

Convergence of the projection against the inclusion in the sense of the operator norm, if this is compact.

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Noctis
  • 383
3 votes
0 answers
45 views

Convergence of $\sin\left(\frac{S}{\sin\left(\frac{S}{\sin(\cdots)}\right)}\right)$

Rakshith PL's user avatar
Rakshith PL
  • 372
1 vote
2 answers
81 views

Show $\frac{d}{dx} a^x$ using a log base other than $e$

user's user avatar
user
  • 158k
3 votes
1 answer
40 views

Finding out if a series converges without solving linear recurrence relation

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Gwen
  • 2,918
0 votes
0 answers
5 views

Construct a unitary matrix from $2^k$ vectors

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user467247
  • 21
0 votes
1 answer
2k views

Calculating cumulative error in distribution of elements

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CommunityBot
  • 1
1 vote
1 answer
22 views

Orthogonal hyperbolic coordinates

Guyang Huan's user avatar
Guyang Huan
  • 169
0 votes
0 answers
11 views

Redefining the Meta-Turing Problem by Introducing an pinfHalt State

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Toni Pravoime
  • 1
0 votes
1 answer
32 views

Stability of zero solution to a $\pi$-periodic linear system

czw's user avatar
czw
  • 39
2 votes
1 answer
34 views

Turing Machine to Generate the Sequence 10110111011110... of increasing number of symbols

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HackR
  • 1,879
-1 votes
0 answers
15 views

Number of knight moves

General ASWalter's user avatar
General ASWalter
  • 53
1 vote
0 answers
15 views

Projective object in the chain complexes

Ezio Greggio's user avatar
Ezio Greggio
  • 355
1 vote
1 answer
2k views

Accuracy of Runge-Kutta compared to Taylor expansion

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Lutz Lehmann
  • 129k
-2 votes
0 answers
17 views

Small Perturbation Rotation and linearization of the rotation axis

Jaewoo Kim's user avatar
Jaewoo Kim
  • 25
3 votes
1 answer
59 views

How to solve (or verify) the following inequality?

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Blue
  • 79.2k
0 votes
1 answer
56 views

Forever Undecided Chapter 4 - is the answer correct?

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AndyB
  • 101
0 votes
0 answers
13 views

ordinal ω+1 explain difference from ω

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Μαρια Κουτσουλιερη
  • 1
0 votes
0 answers
9 views

Moving around a zero measure set without intersections

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Bremen000
  • 1,456
-1 votes
0 answers
25 views

Finding the complete solution of a very very tricky system of linear equations

user23569449's user avatar
user23569449
  • 1
1 vote
1 answer
21 views

Prove $f(a)[g(b)h^{\prime}(c) - h(b)g^{\prime}(c)]+h(a)[f(b)g^{\prime}(c) - g(b)f^{\prime}(c)] = g(a)[f(b)h^{\prime}(c) - h(b)f^{\prime}(c)]$

Martin R's user avatar
Martin R
  • 119k
3 votes
1 answer
24 views

Proving Simplicity of Zeros of a Polynomial.

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Simon Pitte
  • 157
1 vote
1 answer
21 views

Using cylindrical coordinates to evaluate a triple integral

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Sine of the Time
  • 6,700
0 votes
2 answers
3k views

Equation of a curved line from a graph

Community's user avatar
CommunityBot
  • 1
1 vote
0 answers
25 views

Formula relating the Zeta function and the Gamma function

Zackury's user avatar
Zackury
  • 31
0 votes
1 answer
20 views

Eckmann-Hilton argument on 2-cells of (strict) 2 categories

varkor's user avatar
varkor
  • 6,098
3 votes
1 answer
50 views

Prove $\prod (1+a_i^2) \le \frac {2^n}{n^{2n-2}}\left (\sum a_i\right)^{2n-2}$ for positive reals $\prod a_i = 1$

River Li's user avatar
River Li
  • 41.4k
0 votes
1 answer
67 views

Finite open cover of a compact Hausdorff space admits a closed shrinking?

freakish's user avatar
freakish
  • 45.1k
2 votes
0 answers
32 views

Doubt about an inverse-system related to the $P\pm P = 2\Bbb{Z}$ problem. What obvious limits must occur?

Debug's user avatar
Debug
  • 21.9k
0 votes
1 answer
15 views

Completing the solution to a constrained Diophantine equation with inequality conditions

user2661923's user avatar
user2661923
  • 38.1k
22 votes
1 answer
22k views

Homology of surface of genus $g$

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ultralegend5385
  • 7,952
0 votes
1 answer
1k views

Interchanging total derivative and partial derivative

Community's user avatar
CommunityBot
  • 1
6 votes
1 answer
64 views
+50

Relation about line picking on $n$-sphere and $n$-ball

Jacob's user avatar
Jacob
  • 2,513
1 vote
0 answers
33 views

Simple proposition leading to the formula of change of variables formula for multiple integrals

Siderianaut's user avatar
Siderianaut
  • 19
1 vote
1 answer
19 views

On an improper integral with an integrand that exhibits odd symmetry

Ryszard Szwarc's user avatar
Ryszard Szwarc
  • 36.1k
3 votes
0 answers
69 views

A question on linear representation of representable group functors

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Eloon_Mask_P
  • 781
2 votes
1 answer
92 views

$X\cup Y$ dense in $U$ open implies existence of $r\in \partial X\cap \partial Y$, especially $r\in U$

Soumik Mukherjee's user avatar
Soumik Mukherjee
  • 618
0 votes
0 answers
52 views

a nice probability inequality

user2661923's user avatar
user2661923
  • 38.1k
1 vote
1 answer
92 views

The prenex form doesn't seem equivalent to the original sentence

ryang's user avatar
ryang
  • 40.7k
0 votes
1 answer
33 views

Computing character polynomial for irreducible representation

emilg's user avatar
emilg
  • 127
2 votes
0 answers
26 views

Noncommutative analogues of integration

Null Simplex's user avatar
Null Simplex
  • 359
0 votes
0 answers
28 views

Riemann sum (Is this justified)?

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Sam Hilary
  • 39
1 vote
0 answers
28 views

Pointwise estimate of a metric 2 tensor in Yamabe equation

Sarthak's user avatar
Sarthak
  • 33
1 vote
0 answers
22 views

How to summarize the results of a game?

Tzimmo's user avatar
Tzimmo
  • 1,658
2 votes
0 answers
44 views

Is < definable in $\mathbb{Z}$ in the language of rings in a "natural" way?

roblich mandervach's user avatar
roblich mandervach
  • 123
2 votes
1 answer
33 views

Source for these $q$-binomial identities

Marko Riedel's user avatar
Marko Riedel
  • 62.8k
0 votes
1 answer
22 views

Can I represent a transcendental function as an infinite product?

Robert Israel's user avatar
Robert Israel
  • 458k
0 votes
1 answer
33 views

In Geometric Algebra, is the handedness of a coordinate system defined implicitly?

Nicholas Todoroff's user avatar
Nicholas Todoroff
  • 8,115
1 vote
1 answer
101 views

Simple proof that $(3+\frac{1}{x_1}) (3+\frac{1}{x_2}) = 2^y \implies x_1 = x_2 = 1$ (where $x_1$ and $x_2$ are odd, and $y\geq2$)

Gwen's user avatar
Gwen
  • 2,918
-1 votes
0 answers
24 views

Conflicting solutions to a differential equation

Suhas K's user avatar
Suhas K
  • 1
-2 votes
0 answers
12 views

Uniform Convergence on CLT

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GHESTINE MAE SILLAR
  • 1
0 votes
0 answers
29 views

If $\alpha$ is irrational, $\lim_{n \to \infty} \sin(n \alpha \pi)$ DNE

KitanaKatana's user avatar
KitanaKatana
  • 33
5 votes
1 answer
96 views

Creation of products and equalizers implies that of general limits?

Atom's user avatar
Atom
  • 4,346
0 votes
0 answers
15 views

Understanding the relation between probability distribution, cumulative probability function and continuous random variables.

NTc5's user avatar
NTc5
  • 815
0 votes
0 answers
7 views

How does the number of connected components of a Lie group change when passing through n-covers?

Craig's user avatar
Craig
  • 831
0 votes
0 answers
19 views

About $(l^*/l)^\vee\cong l^*/l$

wwwwww's user avatar
wwwwww
  • 105
0 votes
0 answers
9 views

Poincare recurrence on cylindrical sets

Hope's user avatar
Hope
  • 179
0 votes
0 answers
5 views

Traffic Model: Expansion and Compression waves using Rankine-Hugoniot condition

Andy Wang's user avatar
Andy Wang
  • 1
0 votes
0 answers
14 views

Equivalence Condition between Eigenvalues and Semi-Positive Definite Matrices

wulasa's user avatar
wulasa
  • 559
1 vote
1 answer
31 views

Requesting a reference for the fact that $ SL_{n}(K) $ is perfect

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jawlang
  • 715
0 votes
0 answers
6 views

How to prove the convergence of ACF in AR(2) model

Leon's user avatar
Leon
  • 39
0 votes
0 answers
7 views

Solution to a quadratically-constraint linear program

unexpectedvalue's user avatar
unexpectedvalue
  • 73
0 votes
1 answer
41 views

Name for a nonlinear first order Partial Differential Equation

JackT's user avatar
JackT
  • 7,584
0 votes
0 answers
10 views

How to calculate Minimum Mean square error (MMSE) of an estimated value from the given data?

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Userhanu
  • 585
0 votes
0 answers
10 views

Solving a homogeneous linear recursion relation with boundary condition at end points

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RobPratt
  • 48.2k
3 votes
1 answer
32 views

Linear $3\times3$ system of differential equations with multiple eigenvectors

Grey's user avatar
Grey
  • 1,734
1 vote
0 answers
13 views

Lifting idempotents of chain complexes

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Brendan Murphy
  • 951
0 votes
0 answers
19 views

Bounding the Determinant of a Matrix by its Frobenius norm?

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K.defaoite
  • 12.5k
1 vote
0 answers
24 views

Projective cover of simple module is unique up to scalar multiple

Abastro's user avatar
Abastro
  • 109
1 vote
2 answers
2k views

Solution trajectories of a plane autonomous system

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CommunityBot
  • 1
0 votes
0 answers
10 views

multi indexed recurrence relations

Mathew's user avatar
Mathew
  • 1,926
8 votes
1 answer
281 views

What are the monomorphisms in $\mathbf{hTop}$?

Martin Brandenburg's user avatar
Martin Brandenburg
  • 168k
0 votes
1 answer
29 views

Why is this proof of the Tarski-Vaught criterion incorrect?

spaceisdarkgreen's user avatar
spaceisdarkgreen
  • 61.1k
1 vote
1 answer
42 views

Show that $D = \ker(dx_3 - x_1 dx_2) \cap \ker (dx_1 - x_4 dx_2) \subset T \mathbb R^4$ is a distribution of rank two.

Nate's user avatar
Nate
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