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4 votes
2 answers
285 views

Does homotopy equivalence to a subspace imply (weak) deformation retract?

0 votes
0 answers
3 views

Formula for the Sum of the Reciprocals of the Imaginary Parts of the Nontrivial Zeroes of the Riemann Zeta Function

0 votes
0 answers
6 views

Software language specification: null VS empty objects.

0 votes
0 answers
15 views

Limit of a probability of entering a region

1 vote
1 answer
19 views

Second order partial implicit derivatives

4 votes
1 answer
32 views

On the number of f-stable subsets

6 votes
2 answers
162 views

Why isn't the ∞-groupoidification of a category 1-truncated?

3 votes
1 answer
169 views

Resolvent of maximal-monotone operator

1 vote
2 answers
1k views

The integral of complex function is zero

0 votes
0 answers
17 views

Convergence or divergence of $a_{n+1}=a_n +\frac{a_{n-1}}{(n+1)^2}$

1 vote
1 answer
27 views

Is $X \mapsto \operatorname{tr}( DXAX^TD^T - DXCD - DC^TX^TD)$ a convex function?

0 votes
0 answers
6 views

Determinant of $A=(a_{(im),(jn)})$, with $a_{(im),(jn)} = b_{ij} + c_i\delta_{ij}\delta_{mn}$

0 votes
2 answers
43 views

Find the lenght of segment $AE$ in the figure below

-1 votes
0 answers
10 views

A problem about the center of agroup in group theory

0 votes
0 answers
6 views

Applications of First Passage for Brownian Motions?

0 votes
0 answers
10 views

A beautiful property that connects five points located on a circle to the nine point circles

4 votes
2 answers
360 views

Roots of a monic polynomial $f(X) \in k[X]$ in splitting field distinct, form a field, then char $k = p$ and $f(X) = X^{p^n} - X$

1 vote
0 answers
9 views

Multiple integral with laplace operator

0 votes
0 answers
66 views

Questions regarding the Hilbert space operator $x\mapsto \langle x, a \rangle a$

0 votes
1 answer
17 views

Euler's mesh characteristic and watertightness properety of a 3d STL surface mesh [SOLVED}

-1 votes
0 answers
14 views

Integration of a very hard expression

15 votes
1 answer
4k views

Ring of Polynomials is a Principal Ideal Ring implies Coefficient Ring is a Field?

1 vote
0 answers
61 views

Find a solution of a conservation law

0 votes
0 answers
17 views

Is teaching how to solve recurrence relations using generating functions too much for a first year discrete maths course?

0 votes
3 answers
60 views

Confused on iterative approach used in solving this recurrence relation.

0 votes
0 answers
9 views

Lemma 1.1.2.10 in Higher Algebra

2 votes
0 answers
10 views

Approximating a Binomial Expansion using Error Functions

2 votes
2 answers
27 views

When exactly are 2 functions said to be equal?

0 votes
0 answers
13 views

Infinite-dimensional cube $[0,1]^\mathbb N$ compact/complete under certain metrics?

0 votes
0 answers
5 views

Reducing the off-diagonal elements of the matrix while maintaining its rank

1 vote
1 answer
46 views

Regarding relative compactness in baby rudin

2 votes
1 answer
70 views

MLE of $\theta$ from $N(\theta+2, \theta^2)$

2 votes
1 answer
140 views

What Quantifier is Used When Assuming P(n) for some n, in the Induction Hypothesis?

-1 votes
0 answers
5 views

necessary sufficient condition for LU decomposition

0 votes
1 answer
25 views

Solving for f when f(x+y)=f(x)+f(y)+axy where a is a real number

1 vote
1 answer
22 views

Exponential of nonlinear operator for a Cauchy problem

-1 votes
0 answers
6 views

Why were vertex-transitive graphs introduced?

0 votes
1 answer
1k views

Rank of Principal submatrix of annihilator matrix

0 votes
0 answers
16 views

Confusion over Riemann's prime counting function

10 votes
3 answers
1k views

Difference between “for some $k$” and “for some arbitrary $k$”

0 votes
1 answer
21 views

Probability Problem with Combinatorica

0 votes
1 answer
403 views

Sketching in a special case that Brocard's problem have only finite primitive solution i.e Brown's numbers

4 votes
1 answer
368 views

How do I find the probability distributions for multiple dice rolls for dice with a differing number of sides?

0 votes
0 answers
4 views

Notation for empirical measure (Dirac measure)

17 votes
2 answers
694 views

What is the minimum number of avoids for Dota 2 never ever have a match?

0 votes
0 answers
14 views

What's so special about the Levy distribution?

-1 votes
0 answers
14 views

Solving a second order differential equation from contest

0 votes
1 answer
46 views

Integral $\int_0^{\frac{-\pi}{2}} \frac{(2\pi i + \epsilon e^{i\theta})^4i\epsilon e^{i\theta} d \theta} {e^{2 \pi i + \epsilon e^{i \theta}} - 1}$

4 votes
4 answers
355 views

Approximating an Ellipse with Circular Arcs.

0 votes
0 answers
47 views

Example of a proof system that is complete but not sound

0 votes
1 answer
498 views

Non-Negative Vs Positive Semi Definite

2 votes
1 answer
14 views

Is the gradient of the L- Lipschitz function bounded by L?

2 votes
3 answers
6k views

Confusion with a limit of Cothx

0 votes
0 answers
22 views

Find the point $P$ on an ellipse such that $\overline{AP} + \overline{BP}$ is minimum for given points $A$ and $B$

0 votes
2 answers
51 views

Use Taylor expansions to find if an improper integral converges

2 votes
1 answer
17 views

Finding the residue of complex function having pole of order 3

1 vote
0 answers
15 views

Determine the convexity of a ball in a metric space.

0 votes
1 answer
2k views

Integration by parts for the tensor

0 votes
0 answers
17 views

Check the Integration process for this integration: $\int_0^s \exp\left(-ax+\frac bx\right)~dx$

0 votes
0 answers
21 views

Let a group $G$ acts on a tree. So, it transforms some vertex $v$ to $gv=v'$. But I can't understand how it acts on some edge?

-1 votes
1 answer
35 views

Magnitude of Instantaneous Velocity $=$ Instantaneous Speed Rigorous Proof

0 votes
0 answers
50 views

Find the smallest positive integer $n$ satisfying a condition

-1 votes
0 answers
23 views

Help! How to derive cos∠EAC?It is difficult to launch in general methods.

-1 votes
0 answers
14 views

Integration as a limit of sum

1 vote
1 answer
53 views

Integral of cos(z)/(z^2+1)^n [Complex Analysis]

1 vote
1 answer
20 views

The definition of $Y \cdot Q$ in Hartshorne example II.6.6.2 (intersection of a divisor with a subvariety)

4 votes
1 answer
96 views

Adjoining a new element to a ring $R$ that is not a field.

1 vote
0 answers
51 views

Prove $\sum\limits_{\mathrm{cyc}} \sqrt{a+b} \ge \sum\limits_{\mathrm{cyc}} \sqrt{a + bc}$ for $ab + bc + ca + abc =4$

0 votes
0 answers
9 views

derivative of the inverse transpos of a second order tensor with itself

2 votes
1 answer
51 views

how can I show this just using the squeeze theorem and no series expansions

0 votes
1 answer
28 views

Exercise on conditional expectation

2 votes
1 answer
38 views

Factorizibility of a morphism of schemes when the continuous image is contained in a closed subscheme.

0 votes
1 answer
44 views

$\sum 2^{-r_n}/r_n$ diverges $\implies$ $\sum 2^{-\lceil r_n \rceil} / {\lceil r_n \rceil}$ diverges

0 votes
1 answer
30 views

Find the orientation of an ellipsoid that is inscribed in a cube given the relative ratios of its semi-axes

1 vote
0 answers
17 views

Definition of first order differential operator

2 votes
1 answer
60 views

The equivalence relation when constructing the associated bundle

1 vote
0 answers
34 views

Is $r$ when $\lim_{r\rightarrow 0}$ "equivalent" to $\frac{1}{n}$ when $\lim_{n\rightarrow\infty}$?

2 votes
3 answers
9k views

What is the logical equivalence of 'provided that...'?

1 vote
0 answers
20 views

Hartshorne Chapter II theorem 4.7--Valuative criteria for properness

2 votes
1 answer
49 views

How can i prove the Darboux equation for a surface embedded into a 3D Riemannian Manifold?

0 votes
0 answers
7 views

Complex Potential Between Axes and a Hyperbola

3 votes
1 answer
57 views

Why is $\{A \land \neg A\} \vdash \neg\neg B$ in this deduction tree?

2 votes
0 answers
22 views

About Pillai's conjecture

3 votes
1 answer
2k views

Is the min of nonnegative functions concave?

3 votes
0 answers
91 views

Kalman Filter to minimize weighted errors: what's wrong with my derivation

2 votes
1 answer
44 views

functors preserve isomorphism of direct sum.

2 votes
0 answers
36 views

Simple Geometry of bored out volume

3 votes
1 answer
2k views

Number of solutions to $x^2\equiv a\pmod m$

3 votes
1 answer
59 views
+50

Conceptual difference between regularized and constrained optimization.

0 votes
0 answers
32 views

The prime race $a_i \mod 11$ vs $b_i \mod 11$ conjecture

4 votes
3 answers
935 views

Why $F^S$ represents set of functions from S to F?

0 votes
1 answer
16 views

Vertex packing for higher path lengths

1 vote
0 answers
11 views

Using conformal maps to solve the Dirichlet problem for steady temperatures

2 votes
1 answer
1k views

How to find another basis if given one basis for a vector space?

2 votes
0 answers
212 views

Prove that the complex number system does not satisfy three properties

0 votes
2 answers
62 views

Non visual Cauchy product demonstration.

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