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3 votes
1 answer
67 views

Is there a function whose maximizers remain the same after any affine transformations?

0 votes
0 answers
17 views

How to solve this Linear Algebra question related to multiplicity and eigenvalues?

1 vote
0 answers
19 views

Show that the intersection of planes $(VMC),(VNA),(VPB)$ is line if and only if the pyramid has $2$ lateral sides congruent.

0 votes
0 answers
4 views

What's the minimum regularity needed for Picard−Lindelöf?

0 votes
0 answers
6 views

Small doubt regarding proof of Replacement under Von Neumann Universe

0 votes
0 answers
8 views

understanding the integral $\oint_{|z| = 1}z^{-1}dz$

1 vote
1 answer
34 views

Why does the double-angle tangent formula give a different answer for $\tan180^\circ$?

0 votes
1 answer
31 views

What is the uses of Expected Value in this context?

1 vote
0 answers
13 views

Does any permutation "cover" a permutation with less inversions?

13 votes
1 answer
221 views
+50

How many permutations of n elements exist, such that for each pair of permutations, they are still distinct after removing any element?

0 votes
0 answers
16 views

Minimizing a Function with Nonlinear Constraints

0 votes
0 answers
9 views

What is the meaning of "trace of a form with respect to the Kähler form"?

0 votes
0 answers
19 views

Conjecture in distribution of primes

0 votes
0 answers
18 views

Collatz sequence but multiplying by a large odd number rather than $3.$ What is the simplest way to prove that a sequence goes off to infinity?

0 votes
0 answers
31 views

Same number of lists of integers

0 votes
2 answers
57 views

Definite Integral of $\int_{0}^{2\pi}\frac{d\phi}{k-(a+bcos(\phi))^2+(a+bcos(\phi))}$ with $a,b \in \mathbb{R}$ and $k\in \mathbb{C}$

0 votes
0 answers
26 views

Sheaves of sections of vector bundles

2 votes
1 answer
66 views

Examples of Lubin-Tate formal groups

0 votes
1 answer
54 views

local superlinear convergence of Newton's method for C^1 functions

2 votes
0 answers
25 views

In a geodesic triangle, is the longest side opposite to the largest angle?

0 votes
1 answer
2k views

degrees of freedom should be 'k-p-1'... why??

0 votes
0 answers
8 views

Does this inequality correspond to a general statistical property?

0 votes
0 answers
8 views

Some general questions regarding ODE with regular singular points

0 votes
0 answers
4 views

Show convergence of $\sqrt N \int (\hat G_m - G)\,\mathrm d(\hat F_n - F)$ to zero in probability

0 votes
0 answers
28 views

Finding a constant of proportionality

0 votes
0 answers
11 views

Which sums of factorials of distinct positive integers are Poulet-numbers?

7 votes
1 answer
6k views

Normalizing a quasi-rotation matrix

0 votes
1 answer
12 views

Lemma in proof of Cartan's Criterion (Humphreys' 4.3)

0 votes
0 answers
11 views

For continuous surjective $f:R^n\times R^n\to R^n$. Does $\exists g:R^n\times R^n\to R^n$ right-inverse in the second argument, continuous in first?

0 votes
1 answer
36 views

How do we know the dual pairing between Lp spaces is well defined?

4 votes
2 answers
250 views

Showing $\int_{-1}^{1}\ln \left( \frac{x+1}{x-1} \right) \left( x - \sqrt{x^2 - 1} \right) \, dx=\frac{\pi^2 + 4}{2}$

1 vote
1 answer
29 views

Higher homotopy/homology groups of smash product of a space

0 votes
0 answers
9 views

Decomposing multidimentional matrices into contraction of 2-dimentional matrices using the singular value decomposition.

0 votes
0 answers
9 views

Exact manipulation of relationship involving sum produces non-exact values

0 votes
0 answers
5 views

generalized poisson moment function approach to initalize input output model

3 votes
1 answer
41 views

Is it true that $\widehat{(\delta_{x_{0}}\otimes T)} = \hat{\delta}_{x_{0}}\otimes \hat{T}$?

1 vote
1 answer
33 views

Integral of exponential function multiplied by sine function

2 votes
1 answer
132 views

What does it mean to marginalize and condition a causal graph?

0 votes
1 answer
37 views

Legendre transformation is a continuous map

1 vote
0 answers
15 views

A problem about the fixed field of a Galois extension

1 vote
1 answer
27 views

Balancing multivariable functions in optimization

1 vote
0 answers
21 views

Finding the least squares solution of a linear system based on a QR factorization

2 votes
0 answers
25 views

Does a continuous surjective map on topological spaces always have a continuous right-inverse?

0 votes
0 answers
27 views

Solving 1st order PDE including convolution

0 votes
0 answers
16 views

Confusion about inverse kinematics of simple double-jointed arm

1 vote
0 answers
7 views

Any function in Sobolev $H^{s}(\mathbb{R}^n)$ space is continuous and bounded if $s>n/2$

0 votes
1 answer
45 views
+50

Let $\varphi: K_1 \rightarrow K_2$ be a ring homomorphism and $M$ a left $K_2$-module.

2 votes
1 answer
61 views

Double integral of $x^2y+y \sin(x^9)$ dxdy

2 votes
2 answers
2k views

Basis of column/row space of $A$: using pivot columns of $A$ vs. $\text{rref}(A)$?

0 votes
0 answers
12 views

The intersection of all non-empty open subsets of an irreducible scheme is the generic point

0 votes
0 answers
27 views

Sum of subspaces $V$ and $W$ of $\mathbb{R}^n$ with $\text{dim}(V)+\text{dim}(W)=n$

0 votes
0 answers
22 views

Is there a way to project onto the intersection of a box and a half-space in closed form?

1 vote
1 answer
25 views

If $M_n(R)$ is unital then $R$ is unital

0 votes
0 answers
13 views

How the modified Bernoulli numbers relate to the ordinary Bernoulli numbers

0 votes
0 answers
21 views

Integral of a Generalized Laguerre Polynomial

0 votes
0 answers
9 views

Circular Permutations of Repeated Objects with Restraints

1 vote
0 answers
14 views

Uniqueness of RREF for a given matrix

1 vote
1 answer
32 views

Fréchet subdifferential for weakly convex functions on Hilbert spaces

0 votes
1 answer
99 views

Show that $\frac{1-xy-x}{x+y+3} + \frac{1-zy-y}{z+y+3}+ \frac{1-xz-z}{x+z+3} \geq \frac{5}{11}$

0 votes
0 answers
6 views

Gaussian quadrature degree of precision on arbitrary interval

0 votes
0 answers
16 views

Let $K$ be a field. If $f = \text{irr}(c_1;K) = \text{irr}(c_2;K) (c_1 \neq c_2)$ and $\deg(f)$ is odd, then $c_1 + c_2 \not\in K$

-1 votes
0 answers
12 views

What's the only 7x7 Latin square with a single transversal?

0 votes
1 answer
18 views

Calculate the angle $x^o $ in the triangle below

0 votes
0 answers
33 views

Neumann Green function for Laplace decomposition using free space Green function

1 vote
0 answers
11 views

Completion of primary ideal is primary

0 votes
0 answers
10 views

Optimizing a Complex Project-Employee Assignment Function (Pure nonlinear 0-1 programming)

0 votes
0 answers
17 views

Showing that $k[x_1,\ldots,x_n]/\mathfrak{a}$ is a finite dimensional vector space over $k$ assuming basic linear algebra and min amount of abs alg.

0 votes
0 answers
21 views

How to warp a function $z = f(x,y)$ such that the $xy$-plane will located on the surface $z = x^2$?

0 votes
0 answers
10 views

The Helmholtz equation for the spherical harmonics with delta functions

0 votes
1 answer
25 views

Image of connected components under faithfully flat maps

2 votes
1 answer
33 views

Courant and John state that theorems proven for functions of two variables can be easily extended to functions of $n$ variables. Why is this so?

3 votes
0 answers
54 views

AM-GM inequality for non necessary positive numbers

0 votes
0 answers
25 views

Matrix algebras with involutions

2 votes
3 answers
103 views

Time to reach max height with an inverse square law relationship for gravity.

1 vote
0 answers
39 views

Autocorrelation of p-values after $n$ observations

1 vote
2 answers
86 views

The action of $SL(n,\Bbb{R})$ on the tangent space of $SL(n,\Bbb{R})/SO(n)$.

2 votes
1 answer
32 views

Generalization of digamma function

1 vote
1 answer
27 views

Producing a nontrivial proper ideal in the (Kac-Moody) Lie algebra $\mathfrak{g}(A)$

0 votes
0 answers
10 views

Antisymmetric Structure Constants, $f_{ijk}$ of su(N) for generalised Gell-man/Pauli Matrices, $k$ is unique for a given $i,j$

0 votes
0 answers
13 views

Example of semi-stable non sufficiently smooth vector bundle

0 votes
0 answers
17 views

What exactly is the significance of $a_{\phi}$ component in cylindrical co-ordinate system?

0 votes
0 answers
21 views

Spectral types of direct sum of operators

0 votes
0 answers
30 views

The diameter of the union of two sets in a metric space cannot exceed the sum of the diameters of the two sets and the distance between them

0 votes
0 answers
12 views

moment of inertia of cylinder of variable density + uniform rod - Part b).

0 votes
0 answers
15 views

Distance between orbits of circle rotations

8 votes
0 answers
244 views

What is $\min\{ m+k\}$ such that $ \binom{m}{k}=n$?

0 votes
0 answers
14 views

How to find a measurable, Lebesgue invariant bijection between the interval and the 3-dimensional sphere

1 vote
0 answers
16 views

How to show a matrix DAD has distinct eigenvalues, where D is a diagonal matrix and A is a highly structured matrix

1 vote
0 answers
48 views

Do we distinguish between these uses of $"="$ in logic?

2 votes
0 answers
18 views

Unique fixed points in compact space depend continuously on parameter

3 votes
2 answers
75 views

I need help to prove that$\int^1_0 x^{m-1}\ln^2(1-x)dx=\frac{2}{m}\sum_{k=1}^m\frac{H_{k}}{k}$

1 vote
1 answer
342 views

How to find the asymptotic expansion of error function at infinity?

4 votes
1 answer
28 views

What is the collection of functions that neural networks can, in practice, approximate with ease?

0 votes
0 answers
8 views

Applying vector decomposition multiple times and RH orthonormal bases

2 votes
1 answer
65 views

The First Singular Homology Group $H_1(X)$ and the Fundamental Group

1 vote
0 answers
22 views

Sum over product of Bessel functions and exponential

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