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Similar Invertible Matrices

linear-algebra matrices proof-verification

answered 7 secs ago Dietrich Burde 76.9k

0

votes

0

answers

11

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Using Newton's method to find $M$, the unique positive zero of $x^2+x-1$

limits recurrence-relations limits-without-lhopital recursion newton-raphson

modified 36 secs ago user376343 2,701

0

votes

0

answers

6

views

How to interpret regression equation?

statistics linear-regression

modified 39 secs ago Newbie101 1

1

vote

1

answer

12

views

How to graph $\eta(t)=(t,|t|)$?

calculus vector-analysis graphing-functions

answered 1 min ago AlexanderJ93 5,444

0

votes

0

answers

3

views

Conditions for applying the second fundamental theorem of calculus with gauge integrals

real-analysis gauge-integral

asked 1 min ago user626213 1

0

votes

0

answers

30

views

Using $f(x) = e^{-x^2}$ and the points of inflection.

calculus

modified 2 mins ago Ella 319

0

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0

answers

2

views

Kernels and reduced row echelon form

linear-algebra matrices

asked 2 mins ago George Baos 1

0

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0

answers

4

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Showing $|exp(tA)| \leq K$ if all eigenvalues have real part negative or zero (and if zero real part, simple eigenvalue)

differential-equations

asked 3 mins ago Nalt 27

0

votes

1

answer

22

views

Why is $f(x) = 5x$ not a homomorphism?

abstract-algebra ring-theory ring-homomorphism

answered 3 mins ago user289143 107

1

vote

1

answer

26

views

Sketch all solutions of $(w-1)^4= -1$

complex-analysis complex-numbers

modified 3 mins ago gimusi 91.9k

0

votes

1

answer

11

views

Calculation error in calculating zeroes of complex cosine

complex-analysis

answered 4 mins ago gammatester 16.6k

1

vote

1

answer

13

views

Flirting Sequences (Real Analysis)

real-analysis sequences-and-series metric-spaces real-numbers

answered 5 mins ago Clement C. 49.1k

0

votes

1

answer

39

views

What means $ℝ[i]$?

complex-numbers

modified 6 mins ago Asaf Karagila♦ 300k

0

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0

answers

4

views

How to compute the $p$-adic period of $\mathbb G_m$?

number-theory p-adic-number-theory arithmetic-geometry galois-representations

asked 7 mins ago zzy 2,280

0

votes

0

answers

3

views

Normal distribution with unknown mean and variance given f(-x)=f(x)

probability normal-distribution

asked 8 mins ago Jun 3

1

vote

1

answer

16

views

Does the additive group modulo n have proper subgroups if and only if n is not prime?

group-theory modular-arithmetic

answered 8 mins ago C_M 1,291

0

votes

0

answers

9

views

Polar decomposition of normal matrix

linear-algebra

modified 8 mins ago whereamI 199

1

vote

1

answer

33

views

Key Exchange Protocol attack

cryptography

answered 10 mins ago kelalaka 204

0

votes

0

answers

36

views

Approximate expectation of a polynomial of independent Bernoulli variables

probability combinatorics probability-theory polynomials expected-value

modified 11 mins ago R zu 339

2

votes

1

answer

24

views

Finding a subdivision of $K_4$ in a graph with minimum degree $3$.

graph-theory planar-graph

modified 13 mins ago Misha Lavrov 42.9k

0

votes

0

answers

7

views

In my definition, this picture is a closed walk? If yes, how can I enumerate the vertices? In this picture, who is $v_1, v_2,…$?

graph-theory

asked 13 mins ago Pedro Salgado 67

0

votes

0

answers

8

views

Assigning charges to each element in a set

probability

asked 14 mins ago DN41 6

1

vote

1

answer

23

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Extra factor of 2 when evaluating an infinite sum using fourier series and parseval's theorem.

integration complex-analysis fourier-analysis fourier-series parsevals-identity

modified 16 mins ago levap 46.8k

0

votes

1

answer

22

views

Radius of convergence $\sum_{n=0}^{\infty} a_n z^n$, where $a_n = 2a_{n-1} + 1$

sequences-and-series complex-analysis power-series

modified 18 mins ago C_M 1,291

0

votes

0

answers

11

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Do these implications hold?

predicate-logic quantifiers

modified 19 mins ago childishsadbino 97

1

vote

1

answer

10

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Let v in Im(p). Compute p(v).

linear-algebra linear-transformations

answered 23 mins ago Shubham Johri 2,173

0

votes

0

answers

4

views

Eigenvalues of PCA transformed data are the same as original data, why?

eigenvalues-eigenvectors covariance

asked 24 mins ago Jan Scholz 1

2

votes

1

answer

12

views

Transfering order to conditional expectation

probability-theory measure-theory hilbert-spaces conditional-expectation conditional-probability

answered 24 mins ago d.k.o. 8,364

2

votes

1

answer

38

views

if $\{x| f(x) \neq g(x))\}$ has zero measure then $\int f = \int g$.

calculus measure-theory riemann-integration

modified 24 mins ago SmileyCraft 1,078

0

votes

1

answer

10

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Compute $rk(p)$ using Gauss reduction on $A$. Compute $dim(ker(p))$.

linear-algebra linear-transformations change-of-basis

answered 25 mins ago Shubham Johri 2,173

2

votes

1

answer

16

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Find all maximal ideals in a ring formed by all infinite sequences of rational numbers that are $0$ after a point

abstract-algebra commutative-algebra maximal-and-prime-ideals

answered 26 mins ago Mike Earnest 19.7k

0

votes

1

answer

32

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Proof of statement regarding products and limits of sequences

real-analysis

answered 28 mins ago Math1000 18.8k

1

vote

2

answers

37

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NURBS circle without all the double knots?

spline bezier-curve

modified 30 mins ago Peter Taylor 8,507

0

votes

0

answers

7

views

Induced measure by Random variable

probability-theory measure-theory random-variables lebesgue-measure

asked 31 mins ago Sudheesh Surendranath 174

1

vote

2

answers

25

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Using Cauchy’s Theorem/ Cauchy’s Integral Formula for Higher Derivatives or otherwise, evaluate, with justification, the following integrals:

complex-analysis cauchy-integral-formula

modified 33 mins ago Infinitus 43

5

votes

1

answer

945

views

Existence and uniqueness up to isomorphism of the real numbers from axioms

real-analysis elementary-set-theory real-numbers ordered-fields

answered 33 mins ago Timothy 294

1

vote

2

answers

20

views

Combinatorial identity: summation of stars and bars

combinatorics

answered 34 mins ago Felix Marin 66.7k

0

votes

0

answers

9

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Neumann theorem for Bessel function of the first kind (arbitrary order)

summation bessel-functions

modified 34 mins ago MsTais 173

0

votes

0

answers

6

views

Expectation of the product of three normal variables

normal-distribution covariance expected-value

asked 35 mins ago quantguy 73

0

votes

0

answers

13

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Why is serial correlation in pseudorandom numbers/sequences undesirable?

random correlation

modified 36 mins ago mavavilj 2,653

0

votes

0

answers

10

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Calculate dot product without the use of angles

vectors analytic-geometry inner-product-space

asked 38 mins ago jrojasqu 209

2

votes

0

answers

23

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Heat Equation + Uniform Convergence in time -> Harmonic Limit

pde harmonic-functions heat-equation

modified 43 mins ago YoungMath 135

6

votes

1

answer

100

views

+50

Which inequality for the fourth central moment do we need to apply here?

probability-theory inequality expected-value

modified 50 mins ago Roberto Rastapopoulos 794

1

vote

1

answer

139

views

+50

Generate sample of a random process with given correlation function

stochastic-processes numerical-methods

answered 55 mins ago Mike Hawk 1,420

0

votes

0

answers

32

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$|Z(G) \cap G'|$ is not divisible by p if $G$ has abelian p-Sylow subgroups

abstract-algebra group-theory finite-groups representation-theory

modified 56 mins ago Dune 4,362

6

votes

1

answer

43

views

prove a polynomial has at least 2n-1 distinct real roots

linear-algebra polynomials

modified 58 mins ago Eric Wofsey 177k

1

vote

0

answers

18

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Closed from of $\int_0^{\infty} \frac{e^{iax}}{x^{n}+1}dx$?

improper-integrals contour-integration fourier-transform

asked 1 hour ago aleden 1,717

1

vote

0

answers

5

views

Sequences of bounded smooth functions versus numerical sequences of their supremum norms

real-analysis sequences-and-series smooth-functions

asked 1 hour ago Pedro Lauridsen Ribeiro 566

3

votes

1

answer

28

views

Finding $ \alpha $ so that you get two tautologies

logic propositional-calculus

answered 1 hour ago Bram28 59k

0

votes

0

answers

13

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Under what “natural” combinatorial conditions would tetration or higher hyperoperations appear?

combinatorics soft-question ramsey-theory tetration hyperoperation

asked 1 hour ago Isky Mathews 836

1

vote

0

answers

12

views

$\Gamma_1 \cup \Gamma_2$ is not satisfiable iff there exists $\alpha \in WFF$ such that $\Gamma_1 \vdash \alpha$ and $\Gamma_2 \vdash \lnot \alpha$

logic propositional-calculus satisfiability

asked 1 hour ago user401516 852

0

votes

0

answers

6

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“provability of provability” of consistency in the theory T= PRA + Con(PRA) + Con(PRA + Con(PRA)) +… (local and global provability)

logic foundations proof-theory meta-math provability

modified 1 hour ago Ettore 81

5

votes

7

answers

9k

views

Mathematical way of determining whether a number is an integer

number-theory computer-science

answered 1 hour ago Gibron 1

0

votes

0

answers

12

views

What's the idea of testing randomness as distribution inside unit cube?

random

asked 1 hour ago mavavilj 2,653

0

votes

1

answer

23

views

Derivative of matrix using Kronecker Product

derivatives matrix-calculus kronecker-product

modified 1 hour ago greg 7,420

0

votes

0

answers

24

views

How do I factor this complex polynomial?

algebra-precalculus

modified 1 hour ago user376343 2,701

1

vote

1

answer

25

views

When is a vector bundle morphism a vector bundle?

algebraic-geometry vector-bundles

answered 1 hour ago Ben 4,224

0

votes

0

answers

10

views

Invariants in relative cohomology and compact support cohomology of the quotient.

algebraic-topology homology-cohomology modular-forms spectral-sequences

asked 1 hour ago Visitor 330

0

votes

0

answers

24

views

Struggling to understand step in proof regarding a sequence of measurable functions

real-analysis measure-theory proof-explanation

modified 1 hour ago AlephNull 22

2

votes

0

answers

17

views

Expected number of digits of the second-largest prime factor of a very large composite number?

number-theory elementary-number-theory reference-request prime-numbers expected-value

modified 1 hour ago Peter 46.3k

4

votes

0

answers

51

views

+100

Problem understanding Milnor Proof: (Theorem 1, Vector Fields chapter)

differential-topology

modified 1 hour ago Bajo Fondo 333

0

votes

0

answers

9

views

Iterating Projected Gradient

optimization nonlinear-optimization gradient-descent

asked 1 hour ago HD5450 6

1

vote

0

answers

4

views

Dual cone of a closed convex cone

optimization convex-analysis

1 hour ago Eggplant 6

0

votes

1

answer

6

views

Is there a prefix-free language that can encode any other prefix-free language with at most a constant overheard?

formal-languages bit-strings

modified 1 hour ago PyRulez 4,597

0

votes

0

answers

22

views

Minimizing Frobenius norm of the difference between $A$ and $P^\top B P$

linear-algebra optimization orthogonal-matrices

modified 1 hour ago Vincenzo 116

1

vote

0

answers

30

views

Two infinitesimals infinitely close to each other compared to a third one?

definite-integrals infinitesimals

modified 1 hour ago D.R. 1,478

5

votes

3

answers

1k

views

Best estimate for random values

statistics random estimation

modified 1 hour ago norfair 933

0

votes

1

answer

16

views

Cumulative probability funciton of two independent variable

probability probability-theory probability-distributions

answered 1 hour ago Robin Nicole 46

1

vote

0

answers

16

views

Normal approximation of sum of uniform independent RVs using CLT

normal-distribution uniform-distribution central-limit-theorem

asked 1 hour ago QuantumHoneybees 141

0

votes

0

answers

13

views

tensor power method

linear-algebra tensor-products numerical-linear-algebra tensors symmetric-matrices

asked 1 hour ago sambajetson 275

0

votes

0

answers

10

views

Prove that an infinite recursively enumerable subset of natural numbers is the image of some injective recursive function

logic recursion

modified 1 hour ago astro_chae 6

1

vote

0

answers

10

views

When a manifold is isometric to a product manifold?

differential-geometry riemannian-geometry foliations

asked 1 hour ago Michael Arbel 11

0

votes

0

answers

13

views

Transforming probability function ,expected value

probability-distributions distribution-theory uniform-distribution

asked 1 hour ago Levente Bartos 18

1

vote

0

answers

9

views

Which $k-$forms are the pullback under a smooth surjective submersion?

differential-topology

asked 1 hour ago Makenzie 41

0

votes

1

answer

10

views

Describe the shape of projection of vertices (vector positions of a cube) onto a 2D plane from a source (position vector)?

linear-algebra geometry vectors mathematical-physics plane-geometry

modified 2 hours ago Doug M 43.4k

0

votes

0

answers

16

views

Proof of the associated Lie algebra is isomorphic to $T_e(G)$

differential-geometry

asked 2 hours ago user540275 59

0

votes

0

answers

20

views

+50

Show some theorem concerning of the uniform convergence on compacts of a sequence of polynomials of order $<k$

analysis

modified 2 hours ago Richard 1,758

6

votes

0

answers

83

views

+50

Hom scheme of algebraic groups

algebraic-geometry algebraic-groups

modified 2 hours ago zzy 2,280

3

votes

0

answers

21

views

A space obtained by $S^3$ by removing two linked unknots

general-topology algebraic-topology geometric-topology

asked 2 hours ago M. Giovanni Lucaretti 26

0

votes

0

answers

18

views

How can I find the top and bottom most point from the intersection of three circles?

geometry circle

modified 2 hours ago Alex Vong 1,219

3

votes

3

answers

51

views

Right cone, you are at A and need to complete a revolution before reaching the bottom B. What is shortest distance AB?

geometry trigonometry

modified 2 hours ago Jens 3,639

0

votes

0

answers

9

views

Unbiased estimate for a parameter.

statistics statistical-inference estimation parameter-estimation

asked 2 hours ago Fernando 43

1

vote

0

answers

13

views

Critical points of complex-valued Morse function

complex-analysis geometric-topology low-dimensional-topology morse-theory

modified 2 hours ago M. Giovanni Lucaretti 26

1

vote

0

answers

20

views

How homogeneous polynomials relate to curves

algebraic-geometry plane-curves

modified 2 hours ago Jadsheaf 16

0

votes

1

answer

34

views

Sum of this converging telescoping series?

telescopic-series

modified 2 hours ago Baffo rasta 101

0

votes

0

answers

9

views

Degree and codimension of nondegenerate varieties

algebraic-geometry projective-geometry projective-varieties

asked 2 hours ago red_trumpet 779

0

votes

1

answer

18

views

a question related to calculus of variations

calculus-of-variations

modified 2 hours ago Cesareo 7,640

0

votes

2

answers

19

views

probability - pair of dice is rolled

probability

answered 2 hours ago Mike Earnest 19.7k

2

votes

1

answer

20

views

Finiteness of exponential moments of a stochastic integral implies finite moments

probability-theory stochastic-processes stochastic-calculus stochastic-integrals

modified 2 hours ago saz 77.6k

0

votes

0

answers

9

views

Find elements from xor relations

algorithms systems-of-equations binary-operations

asked 2 hours ago itachi101 6

4

votes

1

answer

27

views

Example of a rng with no minimal prime ideal

abstract-algebra ideals maximal-and-prime-ideals

modified 2 hours ago rschwieb 104k

1

vote

0

answers

9

views

Sound wave equation: Neumann boundary conditions

differential-equations physics wave-equation

asked 3 hours ago Alessandro Zunino 96

0

votes

0

answers

16

views

White noise is not a signed measure for fixed $\omega$

probability-theory stochastic-processes stochastic-analysis stochastic-pde

asked 3 hours ago SimonChan 127

4

votes

1

answer

30

views

Why don't we always consider complete measure spaces?

probability

modified 3 hours ago BigbearZzz 6,155

0

votes

1

answer

54

views

Finding supporting planes and bounds for function

optimization self-learning

modified 3 hours ago Cesareo 7,640

0

votes

0

answers

45

views

Proving $\alpha+\beta=\sup\{\alpha+\beta_{\delta}:\delta<\gamma\}$

elementary-set-theory ordinals

modified 3 hours ago Andrés E. Caicedo 64.6k

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