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3 votes
1 answer
62 views

Understanding proof that $\mathbb{R}$ is Cauchy complete

0 votes
0 answers
2 views

Expectation of the Sum of K Numbers without replacement

1 vote
0 answers
9 views

Short of testing an equation how can one tell if a value could be valid

0 votes
0 answers
2 views

A basic example of perfectoid field

-2 votes
0 answers
17 views

What is the cardinality of $2^R$ and $R^R$?

-2 votes
0 answers
12 views

Prove that the Euclidean space defined by this scalar product is not Hilbert.

2 votes
2 answers
22 views

Why is the constant assumed to be zero when solving second order differential equation?

2 votes
0 answers
28 views

How to show that $\displaystyle\ln{x}=2\left(\sum_{n=0}^{\infty}\frac{1}{(2n+1)}\left(\frac{x-1}{x+1}\right)^{2n+1}\right)$?

0 votes
0 answers
5 views

Relation between connection on vector bundle and Ehresmann connection on frame bundle

0 votes
1 answer
18 views

Sum of the reciprocal of n real numbers

0 votes
1 answer
10 views

Is the space of compact linear operators on a separable Banach space separable?

3 votes
1 answer
808 views

Complex Projective Line is homeomorphic to the 2-sphere

0 votes
1 answer
19 views

Computing db2 to db20 coefficients

1 vote
1 answer
4 views

Solving for variable in Summation problem

1 vote
1 answer
13 views

Difference between (propositions used in proofs) and (propositions of propositional logic)

-1 votes
0 answers
8 views

$\sum_{n>0}\frac{f(n)}{g(n)\ln(2n)^2} = C$?

0 votes
0 answers
9 views

Natural Log of an Infinite series of imaginary constants

0 votes
0 answers
28 views

XOR-Product Modulo Prime

0 votes
0 answers
4 views

How to evaluate the conditional mean of Frechet distribution?

0 votes
0 answers
9 views

I need help graphing a cubic and a quartic degree together in desmos.

0 votes
0 answers
13 views

How to add weights in a function

1 vote
1 answer
47 views

Folland pre-meausre for product measure is a pre-measure

0 votes
0 answers
19 views

$f(x)$ is bounded by a quadratic convex function - show it has a minimum

4 votes
1 answer
32 views

A (maybe) trivial question on trivial vector bundles: alternative definition of trivial vector bundle

0 votes
0 answers
9 views

If the directional derivative of the function $g$ exists in any direction

1 vote
0 answers
20 views

Does every simply-connected open subset of $S^2$ have connected complement?

0 votes
0 answers
18 views

How to solve this ODE with respect to t?

1 vote
3 answers
3k views

Prove $E(|X-\mu|) = \sqrt{\frac{2}{\pi}}\sigma$

1 vote
1 answer
30 views

How to compute $E(\max(0, X))$, where $X \sim \mathcal{N}(\theta, 1/n)$?

-1 votes
1 answer
25 views

If k integers are selected at random and without replacement from 1 to 100 what is the probability that any of the integers are adjacent?

0 votes
0 answers
23 views

Pythagorean "like" quadruples, help with general solutions.

5 votes
2 answers
761 views

Bilinear form with symmetric "perpendicular" relation is either symmetric or skew-symmetric

4 votes
3 answers
2k views

Inverse logarithmic integral

1 vote
0 answers
8 views

Definition of $\mathbb{R}$-invariant almost complex structure

3 votes
0 answers
81 views
+100

Do differential forms need sheafification?

0 votes
1 answer
24 views

Gradient on the hyperbolic plane

0 votes
0 answers
12 views

How to prove this convergence theorem for fixed step size

0 votes
0 answers
27 views

Prove that $P(A)=a_nA^n+a_{n-1}A^{n-1}+...+a_1A+a_0I=0$ if $A$ is diagonalizable.

0 votes
0 answers
6 views

Trapped geodesics on periodic metric

1 vote
1 answer
14 views

Coercivity of a bilinear form defined as a weighted integral

3 votes
1 answer
57 views

A sphere of constant radius $r$ passes through the origin $O$ and cuts the axes in $A,B,C.$ Find the locus of the foot of the perpendicular from $O$

0 votes
0 answers
18 views

A curious multiple derivative identity

0 votes
1 answer
31 views

Determining the even Fibonacci numbers.

0 votes
0 answers
3 views

Maintaining the acyclic property of a DAG faster than O(n) time

1 vote
1 answer
37 views

$\binom{mp^n}{p^n}\cong m$ (mod $p$)

0 votes
0 answers
7 views

Eigenvectors of Pauli Matrices - Phase

0 votes
0 answers
16 views

Proposition 9.7 of Atiyah, local domain which is not a field.

0 votes
0 answers
16 views

Set of all endomorphisms that commute with given endomorhphism $F$, with $\mu_F = \chi_F$ is the same as $\mathbb{k}[F]$.

0 votes
0 answers
12 views

An intuitive resource about queuing theory

0 votes
1 answer
37 views

Is $\sin(440\cdot2\pi x)+\sin(440\cdot 2^{1/4}\cdot2\pi x)+\sin(440\cdot2^{1/2}\cdot2\pi x)$ periodic?

0 votes
1 answer
18 views

How do you calculate the average of 2 line gradients efficiently?

0 votes
1 answer
7 views

Finding the rate distortion function

3 votes
0 answers
43 views

Relationship between measure theory and quantification

2 votes
0 answers
33 views

Why is $\langle a,b,c,d\mid abcda^{-1}b^{-1}c^{-1}d^{-1}\rangle\cong \langle a,b,c,d\mid aba^{-1}b^{-1}cdc^{-1}d^{-1}\rangle$?

2 votes
3 answers
38 views

Why is the green theta angle actually equal to theta for the Inscribed Angle Theorem?

0 votes
0 answers
29 views

When is "being ambient isotopic" for embeddings and for subsets an equivalence relation?

0 votes
1 answer
24 views

Prove the Fourier Transform of $f(x-x_{o})$ is $F(\omega)e^{-j \omega x_{o}}$

0 votes
0 answers
19 views

Equality using Euler product formula

0 votes
1 answer
13 views

A question in Homotopy of morphisms of Category of complexes of R-modules

0 votes
0 answers
8 views

How would one prove Unistable shape - or demonstrate Unistability in software/math?

1 vote
0 answers
14 views

Generating set for the space of real valued functions

2 votes
1 answer
138 views

Laurent series and Weierstrass zeta function

0 votes
0 answers
5 views

Combining Interpolation Techniques

0 votes
0 answers
5 views

Proof clarification of hausdorff measure equals lebesgue measure in one dimension

2 votes
0 answers
28 views

Relation algebras and quantifier rank

0 votes
0 answers
71 views

How to prove Bead-Sort is correct?

0 votes
0 answers
11 views

Proof that the Krull dimension of a ring R equals the dimension of Spec(R)

0 votes
1 answer
12 views

Linear programming: Check if this base is feasible

0 votes
0 answers
4 views

DeRham complex for $ad(P)$-valued forms

0 votes
0 answers
19 views

In categories with zero objects: completeness $\Leftrightarrow$ cocompleteness?

0 votes
1 answer
18 views

Lower Bound on Number of Edges in a Simple Graph

0 votes
0 answers
3 views

Derivation of the analytical solution for conditional mutual information

0 votes
0 answers
10 views

How to find the probability of going from node i to node j in t steps in a graph?

3 votes
0 answers
21 views

References for the Euler function $\prod_{k=1}^\infty{(1-q^k)}$

1 vote
1 answer
20 views

A (Poincare?) inequality on $L^1$ space

2 votes
0 answers
38 views

Galois Group of $p(x)=x^{5}+x^{4}+1$

1 vote
0 answers
15 views

Quantitiative weak law of large numbers without higher moments

0 votes
0 answers
18 views

Normal distributions from the primes and its generation function

7 votes
3 answers
422 views

Constructing the Haar measure of the $n$-dimensional Torus

4 votes
1 answer
61 views
+150

Finding the maximum cycle of a given set

0 votes
1 answer
12 views

Is the Picard group of a smooth manifold the same as the Picard group of the associated ringed space?

1 vote
0 answers
23 views

Is ${\rm AGL}(nm, 2)$ has a subgroup equivalent as permutaiton group to regular action of $\mathbb{Z}_{2^n}$?

6 votes
0 answers
141 views
+100

Will my robot go everywhere? It takes steps of length $1$ and turns left $k$ radians before its $k$th step.

1 vote
0 answers
23 views

Finding domain the unbounded operator $\exp(-H)$ where $H=id/dx$ on $L^2(\mathbb{R})$

5 votes
1 answer
57 views

Non-supercuspidal representations are principal series

6 votes
0 answers
39 views

Signs of entries of an involutory matrix asymptotically produce a large circular region with hyperbolic sinks. Why?

2 votes
0 answers
31 views

Bound for the laplacian of a strictly convex function from above by the gradient of it

0 votes
0 answers
5 views

Series representation of the associated Legendre polynomial

1 vote
0 answers
15 views

Symbolic trigonometry tool for graphically entered triangles

5 votes
0 answers
122 views
+50

Is there a quartic polynomial in two variables that have multiple local minima and no other critical points?

1 vote
0 answers
28 views

Adapted continuous process is locally bounded

3 votes
1 answer
53 views

Satisfiability of Divisible Group Axioms

0 votes
2 answers
636 views

Parabola equation from two points and vertex

2 votes
1 answer
18 views

Understanding a given proof for the identity theorem of analytic functions: Why do $f_1$ and $f_2$ agree on a neighbourhood of an accumulation point

2 votes
0 answers
26 views

Is it a true hyperbolic icosahedron?

0 votes
1 answer
14 views

All graphs that are subgraphs of a fixed Graph $G$ is in $P$ or in NPC?

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