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-1 votes
0 answers
6 views

Question about uniqueness of adjoint operartor

4 votes
2 answers
218 views

Finding a sequence of tangent circles with integer radii

2 votes
1 answer
159 views

Periods of certain lagged Fibonacci sequences

0 votes
0 answers
17 views

How to justify why succession and addition cannot be circularly defined like this?

0 votes
1 answer
43 views

Integral calculation $ \int_\gamma \frac{\sqrt{z+1/2}}{z^2+1/4}dz $ along a self-Intersecting Curve in $\mathbb{C}$

0 votes
0 answers
6 views

orthogonality of real irreducible characters

1 vote
0 answers
36 views

Teaching material for a one hour refresher on probability theory (conditional probability)

5 votes
2 answers
220 views

Calculate $\sum_{n=1}^\infty (1-\alpha) \alpha^nP^{*n}(x)$

1 vote
0 answers
15 views

The Fourier transform of $e^{-i/x}$

3 votes
2 answers
95 views

When would you take the derivative of a definite integral?

1 vote
0 answers
7 views

Examples of uniserial rings which are non self-injective.

0 votes
0 answers
9 views

Problem with an example in Werner Amrein book

111 votes
1 answer
4k views

A question about divisibility of sum of two consecutive primes

1 vote
0 answers
14 views

Does wheel theory help give meaning to some division of polynomials?

9 votes
1 answer
179 views

Prove that this sequence is eventually one

1 vote
0 answers
11 views

Solving $y''(x)-2xy'(x)+y(x) = 0$ using power series

1 vote
2 answers
40 views

Topology: Torus and Quotient Spaces

-2 votes
0 answers
7 views

Projection with center on bisector of angle formed by two lines

0 votes
0 answers
9 views

Survival function for a certain population

-1 votes
0 answers
17 views

How to rescale a function

0 votes
0 answers
20 views

Pre image orientation and smooth map

-1 votes
0 answers
5 views

Suitable techniques for integrating moments of arbitrary kernels?

4 votes
1 answer
2k views

Accuracy of the Newton-Cotes formulas for polynomials of degree $n+1$ and even $n$

-2 votes
0 answers
37 views

Diferencial equation non linear: $2y"-2y'+y= e^t\sqrt{y}$

0 votes
1 answer
14 views

Using the dominated convergence theorem to evaluate the integral of independent events

-1 votes
0 answers
41 views

How to prove: $\int_0^\infty \frac{w^m}{w^n + a} \, dw = \Gamma\left(\frac{m + 1}{n}\right) \Gamma(1 - \frac{m + 1}{n})$? [closed]

0 votes
1 answer
25 views

Why is the subfield of $\mathbb{Q}(\zeta_p)$ of index $2$ expressible in terms of the sum of $\zeta_p$ to the power of all quadratic residues mod $p$?

-1 votes
0 answers
12 views

3.6 Brezis Exercise

1 vote
0 answers
16 views

Solving a First Order Hyperbolic system of PDEs with an ill-conditioned matrix.

-1 votes
0 answers
14 views

Mean value theorem method

1 vote
0 answers
21 views

How to calculate angle between vectors in a way that is invariant under translation?

1 vote
0 answers
17 views

Show that a function admits at most one maximizer or provide a counter example.

1 vote
1 answer
44 views

Wirtinger Matrix Derivative Chain rule

-2 votes
0 answers
15 views

Non-solvable residual finiteness of a free Lie algebra

1 vote
0 answers
6 views

Vector field with almost non-periodic orbits

0 votes
0 answers
13 views

Given a matrix $A$ over $F_2[x_1,...,x_n]$ where each entry of $A$ is linear, find the point $x \in F_2^n $ so that $A$ evaluated at $x$ has min rank

1 vote
1 answer
15 views

Is there any algorithm to calculate this ranking method quickly?

0 votes
1 answer
16 views

How to Derive the Binomial Coefficient Upper Bound and Final Inequality in "Scheduling Multithreaded Computations by Work Stealing"?

0 votes
0 answers
6 views

norm difference of product of commuting matrices

4 votes
0 answers
45 views

Largest collection of subsets of [1,n] such that any union of two subsets is unique

2 votes
1 answer
29 views

Why is terminal singularity on surface smooth

4 votes
1 answer
20 views

For a reduced abelian $p$-group $G$, does $P$ being finite imply $G$ is finite?

1 vote
0 answers
18 views

Is there a Relation for Exponentiation Similar to $\leq$ or $\backslash$ (divisibility)?

0 votes
0 answers
26 views

$A: \ell^2 \rightarrow \ell^2$, $A(x_1, x_2, x_3, x_4, \ldots) = (-x_1, \frac{1}{2} x_2, -x_3, \frac{1}{2} x_4, \ldots)$

2 votes
1 answer
24 views

Can you find a linear system with these integer solutions?

3 votes
0 answers
65 views

Question about whether a series converges almost surely

1 vote
0 answers
79 views

Express standard deviation of a sequence in matrix form.

2 votes
0 answers
34 views

What does this ratio of derivatives represent, geometrically?

9 votes
0 answers
85 views
+100

Estimating a complex integral for a probability problem

0 votes
0 answers
27 views

Existence of a solution of a congruence

8 votes
1 answer
177 views
+100

Kalman Filter -- handling large covariance matrices with principal-component-like structures

5 votes
3 answers
77 views

Is there a faster way to find max and min of $P = 4x + 2y + 3$ given $|x| + 2|y| = 4$?

0 votes
0 answers
10 views

Finding any spanning tree that covers a subgraph of a directed graph

0 votes
0 answers
14 views

Can the Turing machine be simplified while retaining Turing completeness?

2 votes
0 answers
65 views

Exploiting symmetry of 4d integral

1 vote
0 answers
9 views

Change of coordinates and compatibility condition for an area constraint

0 votes
0 answers
3 views

The positional relationship between parabolic hypersurface of revolution and hyperplane

0 votes
0 answers
32 views

Calculus of residues ;$\frac{f'}{f}$

1 vote
1 answer
11 views

Cancellative convex spaces and topological vector spaces

0 votes
0 answers
19 views

Given a partition $\mathcal{F}$ of a set $A$, $R = \bigcup_{X \in \mathcal{F}}(X \times X)$ is an equivalence relation on $A$

2 votes
0 answers
21 views

Let $a,b,c,d\in\mathbb{C}$ such that $|a|+|b|\leq 1$ and $|c|+|d|\leq 1$. Show that $|3a+b+3c-d|+|a+3b-c+3d|\leq 7$.

1 vote
0 answers
8 views

Collapse of the AHSS for $E^*(\mathbb{C}\mathrm{P}^n)$ for $E$ a complex-oriented ring spectrum

3 votes
1 answer
3k views

Is this logic correct?

0 votes
1 answer
20 views

Estimating the conditional entropy of a discrete variable conditioning on continuous variable

1 vote
1 answer
37 views

For an epidemic model, I got a negative 'basic reproduction number' obtained by next-generation matrix method. How this can be corrected?

2 votes
0 answers
28 views

Justifying an unpublished identity of Gauss (apparently related to generalized hypergeometric series)

0 votes
2 answers
42 views

$\lambda \in \mathbb{C}$ is an eigenvalue of the operator $A$, then $\text{Re}(\lambda) = 0$ AND $H$ is a complex vector space, then $A = iB$.

1 vote
1 answer
43 views

Embedding $S^1$ into Möbius strip

0 votes
0 answers
11 views

An example application where convergence in probability is useful or valuable

0 votes
1 answer
14 views

Fulton-Harris Proposition C.17 clarification

1 vote
1 answer
16 views

Sub division rings of dimension 2 of division rings

1 vote
1 answer
28 views

Proof that two matrices are row-equivalent iff they have the same nullspace

0 votes
0 answers
12 views

Feasbility of a underdetermined linear inequality system

0 votes
0 answers
19 views

Literature check for a summation formula

0 votes
0 answers
27 views

Lower bound on the order of a graph

1 vote
0 answers
13 views

Can everything in the bounded derived category of $k[x]/(x^2)$ be built in one step?

3 votes
0 answers
113 views

Linking Fourier Coefficients of periodic functions

1 vote
2 answers
42 views

Is Schwarz's Lemma true for squares?

0 votes
0 answers
8 views

How to project an unseen vector to the lower rank SVD subspace?

0 votes
0 answers
6 views

Expected Prediction Error from The Elements of Statistical Learning

0 votes
0 answers
16 views

Proofing that the interior of a convex cone united with the origin is a convex cone also (does the proof suffice?)

0 votes
0 answers
10 views

How to construct the monotone union of disks

0 votes
1 answer
40 views

Is there a closed form for the integral $\int_{0}^{\infty}\ln(z)z^{\lambda - 1}\exp\left(-\frac{w}{2}\left(z + \frac{1}{z}\right)\right)\mathrm{d}z$?

0 votes
0 answers
14 views

Some detail in this integral of delta function

7 votes
0 answers
197 views
+50

Topologies that make a map continuous

0 votes
0 answers
8 views

Quadratic form with Hadamard product, minimization

2 votes
0 answers
21 views

Conceptualizing a CW construction

1 vote
0 answers
12 views

Bound for entry-wise difference of p-unit vectors.

0 votes
0 answers
6 views

Initial conditions for coupled 2nd order ODE, numerical in Python

0 votes
1 answer
86 views

Given two linear transformations T1 and T2, show that range T1 = range T2 if and only if there is an invertible operator S such that T1=T2S.

10 votes
0 answers
89 views

Primes of the form $F(a^{k+1})/F(a^k)$

1 vote
0 answers
8 views

Definition and Use of the Schett Polynomial in the Jacobi Taylor Series

0 votes
1 answer
113 views

Why $W$ is open in baby Rudin 9.28

5 votes
0 answers
18 views

Construct an explicit biholomorphism between two domains

0 votes
0 answers
15 views

Correspondence between all projective representations of $G$ and its universal cover

0 votes
0 answers
11 views

Alternative approach: $A, B \in (C): x^2 + y^2 = 1$ and $OAB$ is a right triangle at $O.$ Find min and max of $P= MA \cdot MB,$ with $M(0; 3).$

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