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Score of 4
3 answers
1382 views

Two polynomials $f,g \in K[x,y]$ ring. Prove that $K[x,y]/(f,g)$ is finite dimensional vector space

Score of 2
0 answers
28 views

Prove that $0 < a < b$ implies $0 < a^n < a^{n-1}b < \cdots < ab^{n-1} < b^n$ and $0 < a^{1/n} < b^{1/n}$

Score of 30
4 answers
1482 views

Equivalence of different ways of geometrical multiplication

Score of 1
1 answer
553 views

Can an SDE be turned into PDE for the density?

Score of 2
1 answer
27 views

Proving smooth algebraic varieties remain smooth after base change by any field extension from first principles

Score of 11
2 answers
574 views

Simple closed form for $\int_0^\infty\frac{1}{\sqrt{x^2+x}\sqrt[4]{8x^2+8x+1}}\;dx$

Score of 8
3 answers
1741 views

Can $2025$ and $2026$ be written as sums of five fifth powers?

Score of 1
1 answer
133 views

Converge of power iteration method when top 2 eigenvalues are the same

Score of 7
1 answer
153 views

Prove $\exp\left(\frac{ue^v-v}{2}\right)-1 \ge \int_v^u\frac{ds}{\sqrt{4+2s^2}}$ for all $u,v\in\mathbb R.$

Score of 0
1 answer
551 views

Proving continuity of a piecewise function.

Score of 1
1 answer
216 views

Singular Fiber types and discriminant

Score of 0
0 answers
37 views

How can I systematically count all integer pairs $(a,b)$ satisfying $(a+1)(b+1)=−2015$ and $a+b≥0$?

Score of 2
1 answer
139 views

Solutions to $ 2 \sin 2x + \cot \frac{(n-1)x}{2} = 0 $ in each interval $(\frac{2k\pi}{n-1},\frac{2(k+1)\pi}{n-1})$

Score of 2
1 answer
557 views

Convergence of complex mercator series

Score of 4
4 answers
6892 views

How to prove $\cos 36^{\circ} = (1+ \sqrt 5)/4$?

Score of 5
1 answer
130 views

Does the metric space $\mathbb R$ with metric $d(x,y) = \sqrt{|x-y|}$ embed into some $\mathbb R^n$?

Score of 8
2 answers
352 views

Finding more solutions to seventh powers $(7,4,4)$ below a bound?

Score of 0
1 answer
559 views

How to visualize four dimensional tic-tac-toe?

Score of 2
2 answers
113 views

A Divisibility Property of Polynomial Values

Score of 1
1 answer
6348 views

The Strategy of Battleship

Score of 3
1 answer
240 views

Understanding why $V^B$ is full

Score of 1
0 answers
81 views

Triangle ABC is valid if and only if what?

Score of 3
1 answer
557 views

Existence of valuation rings in a finite extension of the field of fractions of a weakly Artinian domain without Axiom of Choice

Score of 5
0 answers
41 views

What is the tangent space of $C^2(S^1,S^2)$?

Score of 6
7 answers
2107 views

Proving $\pi^3 \gt 31$

Score of 7
2 answers
255 views

When is exactly the identity $f(z)\delta(z−a)=f(a)\delta(z−a)$ valid?

Score of 2
2 answers
549 views

Solving equations involving both matrix and three-index unknowns

Score of 60
2 answers
1837 views
+500

Topological space where any finite, but not every countable, intersection of compact subsets is compact

Score of 144
31 answers
62086 views

Proofs of AM-GM inequality

Score of 3
1 answer
127 views

On the little-known Dedekind convergence test

Score of 1
1 answer
553 views

Group of affine transformation in plane is unimodular

Score of 3
1 answer
94 views

What distribution does this data fall into? It represents discrete count data over a time interval, but doesn't fit anything I've checked.

Score of 2
0 answers
27 views

Is the constant of the convolution with the Riesz potential attainable?

Score of 2
0 answers
28 views

Euler Number of Bundles on a Grassmannian

Score of 1
2 answers
558 views

Affordable proof for Kirszbraun's theorem

Score of 2
1 answer
1911 views

How 3rd Quartile (Q3) is positioned at 0.675 SD in case of normally distributed data?

Score of 2
1 answer
419 views

Model to predict frequencies in a Normal (Gaussian) distribution - standard deviation

Score of 2
1 answer
550 views

Bounds or asymptotics for high raw moments of binomial distribution

Score of 15
2 answers
545 views
+50

Is it true that $x_{n+1}=x_{n-1}+2\log x_n=\operatorname{li}^{-1}(n)+O(\log n)$?

Score of 2
2 answers
124 views

4 Pattern vs algebraic method for finding sum of digits (which one is better?)

Score of 65
7 answers
4718 views

Recursive sequence $a_{k+1} = a_k - \gcd(a_k, (n+k)^2 - 1)$ generating twin primes

Score of 1
1 answer
120 views

Is there a construction where the universal quantifier is more natural than the existential quantifier?

Score of 1
1 answer
109 views

If the sum of a sequence of positive numbers is infinite, is every point in the real plane accessible relative to the sequence?

Score of 3
1 answer
567 views

weak solution of the wave equation

Score of 5
2 answers
217 views

Is there a difference between computable model theory and computable structure theory?

Score of 4
1 answer
75 views

"Prime fingerprint game" and coupon collector's problem

Score of 2
4 answers
85 views

Is $\left\{(x,y) \in\Bbb R^2: y^2 = (x^3 - 2x^2 + x) \right\}$ $\subseteq$ $\left\{(x,y): \exists t \in\Bbb R[x= t^2,y= t^3 - t]\right\}$?

Score of 2
2 answers
189 views

Should the standard deviation be multiplied by a factor or be the root of sum of the variances?

Score of 0
0 answers
29 views

Is it correct to think that the plane with the maximum metric “curves” around the point from which distances are measured?

Score of 5
1 answer
241 views

Predecessor function in $\lambda_I$-calculus

Score of 2
1 answer
39 views

Regarding definition of maximal semisimple abelian subspace

Score of 1
0 answers
81 views

Convergence of certain integral over torus

Score of 0
0 answers
38 views

Does the theory of symmetric functions show up in statistics?

Score of 1
1 answer
48 views

Tensor derivatives in continuum mechanics

Score of 0
0 answers
37 views

Bijective holomorphic maps have non-singular jacobian

Score of 4
2 answers
598 views

Dual of the relative entropy cone

Score of 0
1 answer
114 views

Help me understand the meaning of two math symbols.

Score of 9
1 answer
281 views

How does the Monty Hall Problem look Generalized?

Score of 2
1 answer
556 views

Linear regression vector notation

Score of 2
1 answer
100 views

What is the probability that there are more than $50\%$ of those customers who responded the messages?

Score of 0
0 answers
107 views

Is it possible that two irreducible polynomials with different variables differ by a constant factor?

Score of -2
0 answers
68 views

Is a product $\sigma$ algebra only countably generated if the involved $\sigma$-algebras are countably generated?

Score of 0
1 answer
122 views
+50

Fiber product of categories

Score of 1
1 answer
57 views

Understanding definition of an Itô diffusion

Score of 1
1 answer
829 views

Schwarz reflection on unit disk and Cayley transformation.

Score of 2
1 answer
76 views

Most elementary introduction to Stokes and divergence theorem in euclidean space

Score of 1
1 answer
127 views

Does $(V/S) \cong (T)$ always imply that $(V/S)^* \cong (T)^*$?

Score of 1
2 answers
422 views

How to prove terence tao proposition 9.3.9

Score of 4
5 answers
138 views

Let $f(x)$ be a polynomial such that $c_0$ and $c_n$ have opposite signs. Prove that $f$ has at least one positive root.

Score of 1
1 answer
1145 views

Nim Variant - Strong Induction Proof

Score of 1
4 answers
662 views

Is sum of a series correct terminology?

Score of 2
1 answer
568 views

Independence of stochastic processes

Score of 33
3 answers
2126 views

Is A276175 integer-only?

Score of 3
1 answer
426 views

How to compute (co)limits of enriched categories?

Score of 1
0 answers
499 views

Remainder in Asymptotic Expansion of Erfc

Score of 0
0 answers
85 views

Prove/disprove upper bound and lower bound of the Integral

Score of 2
1 answer
682 views

Laplace expansion of Pfaffian

Score of 2
1 answer
67 views

Prove that $S_n$ is doubly transitive on $\{1,2,\ldots,n\}$ for all $n\geq 2$.

Score of 10
1 answer
1097 views

The number of orbits of a (normal) subgroup

Score of 4
3 answers
421 views

Proof in Arithmetic Progression

Score of 1
1 answer
210 views

Use Holder's to show $\left( \sum_{\mbox{cyc}} \frac{a}{\sqrt{k(a,b,c)}} \right)^2 \left( \sum_{\mbox{cyc}} ak(a,b,c)\right)\geq (a+b+c)^3$

Score of 1
0 answers
555 views

Classifying Space for What is the Infinite Unitary Group?

Score of 5
2 answers
248 views

Verification of an asymptotic formula for an exponentially weighted prime sum

Score of 1
1 answer
111 views

Fixing the bounds of a definite integral

Score of 6
1 answer
78 views

Doubt about fibrations in left Bousfield localization

Score of 2
2 answers
184 views

Find the value of $E=\sum_{k=1}^4 \big(\cos\frac{k \pi}{9}\big)^4.$

Score of 1
0 answers
46 views
+50

Uniqueness and Universality of the Ring $W_n(K_s)$ of Truncated Witt Vectors in generalized Kummer Theory

Score of 3
3 answers
7930 views

Is there NO solution to this linear system of 3 equations, $3$ unknowns?

Score of 1
1 answer
116 views

Can angle between two surfaces be acute only?

Score of 0
0 answers
28 views

Does a Explicit Euler Scheme and Projection Method provides a solution that satisfies both the discrete momentum and continuity equations?

Score of 2
2 answers
781 views

What is $B_{2k}$ in the power series representation of $\tan(z)$?

Score of 2
1 answer
276 views
+200

Are these the only two uniquely determining equational identities?

Score of 9
4 answers
648 views

What properties of a metric space force the uniqueness of open balls in it?

Score of 0
1 answer
669 views

When can a regular surface be written as the graph of some function.

Score of 4
3 answers
798 views

Book suggestion to prepare the grounds for studying functional analysis

Score of 1
1 answer
556 views

How to find the value of gain K at which the root locus intersects with the imaginary axis

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