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0

votes

1

answer

7

views

Calculate the volume of a solid of revolution

calculus volume solid-of-revolution

modified 1 min ago RobPratt 16k

0

votes

0

answers

5

views

Quick Linear Approximation Question

calculus integration algebra-precalculus derivatives definite-integrals

asked 2 mins ago joe 71

0

votes

1

answer

8

views

Identifying a topological space

general-topology compactness compactification

modified 3 mins ago J. W. Tanner 45.8k

0

votes

0

answers

3

views

Finding the smooth inverse of a function

multivariable-calculus differential-geometry smooth-functions

modified 3 mins ago One Above All 1

0

votes

0

answers

13

views

+100

Efficiency of a sequential process

statistics programming

modified 3 mins ago Tejas 1,814

0

votes

0

answers

5

views

Proof of two equivalent definitions of the spectral norm

linear-algebra eigenvalues-eigenvectors spectral-norm

asked 3 mins ago Maybe 287

0

votes

0

answers

29

views

How would I prove $-3x^2-1<0$ for all values of $x$ by induction?

inequality proof-writing induction

modified 4 mins ago Anas c 23

0

votes

0

answers

3

views

Macaulay Duration

actuarial-science

asked 5 mins ago swordlordswamplord 133

1

vote

1

answer

13

views

Breaking down a maximal $r$-separated subset of $\mathbb R^d$ into a finite disjoint union of $s$-separated subsets

general-topology metric-spaces

modified 5 mins ago AlexL 2,343

0

votes

1

answer

15

views

Find the explicit solution of the ODE

ordinary-differential-equations partial-differential-equations

modified 6 mins ago Physor 1,738

0

votes

1

answer

38

views

What is “ $ argmin \|p-z\|^2 $ ”?

probability-distributions projection

answered 6 mins ago hiropon 103

0

votes

0

answers

10

views

Find the position of a circle tangent to two intersecting lines

geometry

modified 12 secs ago Mohsen Shahriari 3,894

1

vote

2

answers

33

views

Proving the probability of the sum of 500 dice being an even number

probability probability-theory conditional-probability dice

modified 9 mins ago Tortar 1,463

0

votes

0

answers

4

views

About generalized linear model

probability-theory statistics conditional-expectation

asked 11 mins ago anto_zoolander 51

0

votes

1

answer

17

views

prove that covariance matrix can be expressed as $XCX^\top$ with C is centering matrix

matrices summation covariance linear-regression projection-matrices

modified 12 mins ago smaillis 121

-2

votes

0

answers

6

views

Power set and Disjoint sets

discrete-mathematics

asked 13 mins ago Brock Marshal 9

1

vote

1

answer

51

views

Upper and lower bound on characteristic function

real-analysis smooth-functions

modified 14 mins ago Calvin Khor 23.6k

0

votes

0

answers

18

views

Ergodic theorem, limiting probabilities

probability stochastic-processes markov-chains ergodic-theory

modified 14 mins ago baoiba 49

0

votes

0

answers

6

views

I'm not sure how this DFA corresponds to this Generalized NFA

automata

asked 15 mins ago Ryan Marr 1

1

vote

1

answer

11

views

Optimization problem involving semi-definite matrices

linear-algebra optimization positive-semidefinite

modified 15 mins ago hardmath 32.7k

1

vote

0

answers

4

views

Help with geometry of triangles in spheres.

geometry triangles 3d spheres

modified 1 min ago Mohsen Shahriari 3,894

0

votes

1

answer

11

views

Why is the statement “$\Gamma \cup \{ \phi \}$ is inconsistent and $\Gamma \cup \{ \neg \phi\}$ is inconsistent” a contradiction.

logic propositional-calculus

answered 17 mins ago Noah Schweber 176k

0

votes

0

answers

3

views

Low Positive Correlation or No Correlation on ScatterPlot?

correlation

asked 17 mins ago shrewd.jude 13

2

votes

1

answer

29

views

path in word graph

combinatorics graph-theory

modified 18 mins ago Exnur 96

0

votes

0

answers

8

views

CDF of Pareto Distribution

probability integration

asked 18 mins ago fda 101

0

votes

0

answers

7

views

Why is this formula for time in respect to acceleration and distance wrong?

calculus physics quadratics

modified 21 mins ago Justice Almanzar 1

0

votes

0

answers

7

views

Does the integral $\int_{-\epsilon}^{\epsilon}\frac{1}{1-f(x)}dx$ converge? [Application to random walks via Chung Fuchs]

integration convergence-divergence random-walk

asked 22 mins ago Evariste 1,826

1

vote

0

answers

3

views

Find the intersection of the ideals $(x,y)\cap (z,x-t)$ in $k[x,y,z,t]$ where $k$ is algebraically closed field.

algebraic-geometry commutative-algebra

asked 23 mins ago user123 33

0

votes

0

answers

19

views

Equivalence of contractible and trivial fibrations

algebraic-topology fibration

modified 23 mins ago Dean Young 4,400

1

vote

2

answers

29

views

$|1-z|=2\sin \Big( \frac{\arg z}{2} \Big) $ without computations

complex-analysis complex-numbers

modified 24 mins ago QED 9,686

0

votes

0

answers

3

views

numerably paracompact spaces

general-topology

asked 24 mins ago Diana Isabel Hernández 1

0

votes

1

answer

30

views

Show that $\Sigma_1=\Sigma_2$

real-analysis measure-theory lebesgue-measure

answered 25 mins ago Adam 456

2

votes

1

answer

37

views

Linear algebra with unknown binary vector

linear-algebra combinatorics optimization

modified 25 mins ago John Hughes 80.8k

0

votes

1

answer

11

views

Properties of s(u); a SMOOTH CURVE in ℝ³.

vector-analysis plane-curves smooth-functions

answered 26 mins ago sufferingmathsstudent 1

0

votes

1

answer

17

views

Fundamental group of $S^1\vee S^1$ without applying seifert-van kampen's theorem

algebraic-topology circles homotopy-theory fundamental-groups retraction

modified 26 mins ago probably123 1,191

0

votes

0

answers

5

views

recursive set and recursive enumerable set

discrete-mathematics

asked 29 mins ago amin 1

1

vote

1

answer

22

views

Proof Rényi entropy is non-negative

entropy quantum-information

modified 30 mins ago Tuvasbien 3,425

0

votes

0

answers

6

views

Markov Chain with maximizing profits

probability optimization stochastic-processes markov-chains markov-process

modified 32 mins ago NotSoAbel 1

0

votes

0

answers

9

views

Find probability of that a male over the age of 65 has prostate cancer given that he has received a positive test result.Do i use bayes formula?

probability statistics

asked 33 mins ago theoneandonly 1

0

votes

1

answer

12

views

Compact Metric Space and Weak Contraction

real-analysis metric-spaces

answered 35 mins ago Kavi Rama Murthy 220k

1

vote

1

answer

32

views

Real analysis question for $b_{n+1} = a_{n}+a_{n+1}$ and $b_{n}$ converges

real-analysis sequences-and-series convergence-divergence

answered 37 mins ago Brian M. Scott 526k

0

votes

0

answers

3

views

Minimize determinant of the product Vandermonde$\cdot$Nonnegative

matrices optimization determinant closed-form matrix-decomposition

asked 40 mins ago Lab 27

0

votes

0

answers

4

views

Fractional Cauchy Integral formula (generalization ?)

complex-analysis gamma-function cauchy-integral-formula fractional-calculus reduced-residue-system

asked 41 mins ago R.F.M. 1

0

votes

0

answers

17

views

If $S\subseteq(0,\infty)$ is uncountable, must there exist a strictly decreasing sequence $s_n\in S$ with $\sum_{n=1}^\infty s_n=\infty$?

sequences-and-series

modified 23 secs ago thewonderfulwizardofoz 305

0

votes

0

answers

11

views

Finding the number of $n \times n$ elementary matrices over the field $\mathbb{F_p}$

linear-algebra combinatorics matrices field-theory solution-verification

asked 45 mins ago Subhasis Biswas 2,352

0

votes

2

answers

10

views

Whether a sequence of Bernoulli variables converges in distribution

statistics stochastic-processes random-variables sampling-theory

answered 51 mins ago Kavi Rama Murthy 220k

0

votes

1

answer

13

views

For number N how to find x,y where x*y = N and |x - y| is minimum?

arithmetic

answered 56 mins ago QED 9,686

1

vote

1

answer

13

views

Determining Whether the Zero Locus of a Function is a Manifold

differential-geometry manifolds smooth-manifolds

modified 56 mins ago Alekos Robotis 17.6k

0

votes

0

answers

4

views

Sketching vector field for varying $r$ for: $\dot{x} = 1+rx+x^2$

calculus dynamical-systems bifurcation

asked 56 mins ago ozera ozera 3

-1

votes

0

answers

14

views

The charts of $\Bbb{P^1(C})$ are defined over $\Bbb{Q}$. Those of $y^2=x^3+5x+1$?

algebraic-geometry algebraic-number-theory elliptic-curves

modified 59 mins ago reuns 43.2k

1

vote

0

answers

14

views

Does the argument that the cantor set has measure zero still work if we remove a different section?

measure-theory cantor-set

asked 1 hour ago Bears 494

0

votes

1

answer

9

views

Definition of composition used in Axler's proof 3.101, Algebraic Properties of Dual Maps

linear-algebra dual-maps

answered 1 hour ago Pedro Ignacio Martinez Bruera 155

0

votes

0

answers

5

views

Convergence of Legendre Expansion in the Mean-Square sense.

real-analysis fourier-analysis legendre-polynomials

asked 1 hour ago Anthony P 346

0

votes

1

answer

20

views

Maximal possible edges in graph

graph-theory extremal-graph-theory

modified 1 hour ago M. Winter 25k

0

votes

1

answer

8

views

Is there a function with domain spanning (-∞,∞), without a constant period, and that is neither decreasing nor increasing from or to either infinity?

functions

answered 1 hour ago David K 71.6k

0

votes

0

answers

13

views

Number of isomorphisms $V \to W$

linear-transformations

asked 1 hour ago TomJones 1

0

votes

1

answer

12

views

$X - Y$ converges in probability?

probability probability-theory convergence-divergence

answered 1 hour ago Pedro Ignacio Martinez Bruera 155

-1

votes

0

answers

7

views

Real Gaussian integrals for positive definite matrix A

integration matrices positive-definite transpose gaussian

asked 1 hour ago z7321 1

21

votes

2

answers

7k

views

Closed form for $ S(m) = \sum_{n=1}^\infty \frac{2^n \cdot n^m}{\binom{2n}n} $ for integer $m$?

taylor-expansion riemann-zeta hypergeometric-function pattern-recognition catalan-numbers

modified 1 hour ago Raymond Manzoni 39.2k

1

vote

1

answer

38

views

+50

Image of regular submanifold is a regular/embedded submanifold.

differential-geometry proof-explanation manifolds smooth-manifolds

modified 1 hour ago lulu 2,208

0

votes

1

answer

22

views

Stochastic Integral Computation

brownian-motion martingales stochastic-integrals

modified 1 hour ago Federico Vega 33

0

votes

0

answers

13

views

Multivariable chain rule problem with gradient norm.

multivariable-calculus

asked 1 hour ago David Mora 27

0

votes

1

answer

12

views

How do you notate a large range of discrete set values conforming to some consistent pattern?

elementary-set-theory notation

answered 1 hour ago RobPratt 16k

1

vote

0

answers

23

views

Big O's on bases less than 1

computational-complexity asymptotics computer-science

1 hour ago Simon 11

2

votes

1

answer

54

views

Vectorization and inner product of matrices

linear-algebra matrices inner-product-space

modified 1 hour ago greg 18.1k

-1

votes

0

answers

13

views

How to solve following initial value problem using Laplace transform: $y′+y=6+δ(t-5); y(0)=0$

ordinary-differential-equations laplace-transform inverse-laplace

modified 1 hour ago Moo 7,624

1

vote

1

answer

15

views

Integrating using series and squeeze theorem

sequences-and-series indefinite-integrals

answered 1 hour ago Äres 6,472

0

votes

0

answers

18

views

Rudin's Principles of Mathematical Analysis Theorem 3.50 - why limsup in final step?

analysis

asked 1 hour ago sunnydk 25

0

votes

0

answers

7

views

VRP with multiple locations for the came customer?

optimization integer-programming discrete-optimization

modified 1 hour ago RobPratt 16k

0

votes

0

answers

5

views

Euler line, circle, midpoints and circumcenter

analytic-geometry

asked 1 hour ago Wilson Massaro 143

0

votes

1

answer

8

views

Combinations of activities in a fun park

probability

answered 1 hour ago Varun Vejalla 5,070

2

votes

1

answer

31

views

Is the sequence $(x)n=cos(n)/sqrt(n+1)$ in L2?

metric-spaces lp-spaces

modified 1 hour ago tomer sher 1

0

votes

1

answer

23

views

$L_2$ distance and Hellinger distance

functional-analysis probability-theory

answered 1 hour ago Fei Cao 136

1

vote

0

answers

38

views

What is the dimension of this vector space?

abstract-algebra ring-theory field-theory principal-ideal-domains

modified 1 hour ago Hawk 11.1k

2

votes

0

answers

42

views

strange coincidence

number-theory

modified 1 hour ago Varun Vejalla 5,070

0

votes

0

answers

12

views

About the splitting of tangent space in the neighborhood of a point

differential-geometry differential-topology lie-groups smooth-manifolds group-actions

asked 1 hour ago John Smith 23

1

vote

0

answers

25

views

Existence of a finite subset of the unit sphere with a particular orthogonality property

geometry discrete-mathematics orthogonality spheres combinatorial-geometry

modified 1 hour ago Servaes 46.3k

-1

votes

0

answers

24

views

Simplifying a double sum

number-theory summation

modified 1 hour ago Peter Phipps 2,659

2

votes

1

answer

27

views

In a $T_0$ space the union of two scattered sets is scattered

general-topology

answered 2 hours ago Brandon du Preez 1,723

2

votes

1

answer

16

views

Direct proof - DROP-OUT (A) is a regular language

solution-verification automata automated-theorem-proving

answered 2 hours ago Brian M. Scott 526k

5

votes

1

answer

25

views

Number of $5$-Sylows of a simple group of order $660$.

group-theory finite-groups sylow-theory simple-groups

answered 2 hours ago Derek Holt 66.2k

0

votes

0

answers

18

views

Even terms and odd terms diverge imply the the original series diverge

real-analysis

asked 2 hours ago Sophie 91

2

votes

0

answers

61

views

Cauchy's Functional Equation $ f ( x + y ) = f ( x ) + f ( y ) $ with the Additional Assumption $ f \left( x ^ { n + 1 } \right) = x ^ n f ( x ) $

functional-equations

modified 2 hours ago Mohsen Shahriari 3,894

0

votes

0

answers

17

views

Moduli space of trigonal curves

algebraic-geometry algebraic-curves

asked 2 hours ago nicolas 23

1

vote

1

answer

18

views

Proving that the pointful and the pointless forms of the well-inside relation coincide

general-topology locales

modified 2 hours ago Alex Kruckman 42.8k

0

votes

1

answer

15

views

Inequality with 2 variables

inequality

answered 2 hours ago sudeep5221 881

0

votes

2

answers

42

views

Maximum number of people dancing at the party

algebra-precalculus arithmetic problem-solving word-problem

answered 2 hours ago cosmo5 901

2

votes

2

answers

64

views

What's the deal with recreational mathematics?

recreational-mathematics

modified 3 hours ago Robert Israel 390k

2

votes

3

answers

36

views

Is every infinite decimal sequence convergent?

convergence-divergence

answered 3 hours ago Alex R. 29.5k

1

vote

0

answers

19

views

Measures and $\sigma$-algebra

analysis measure-theory

asked 3 hours ago Ahsan Ali 11

0

votes

0

answers

6

views

If a zero entropy distribution implies high information a priori, what does it mean ex posteriori?

probability information-theory entropy

asked 3 hours ago develarist 389

1

vote

1

answer

9

views

average spectral norm of a random matrix

linear-algebra random-matrices spectral-norm

answered 3 hours ago Qiaochu Yuan 319k

1

vote

0

answers

12

views

Inclusion of genus $g$ surface minus $2$ points into genus $g+1$ surface minus $2$ points induces inlcusion on fundamental groups

algebraic-topology homotopy-theory surfaces fundamental-groups

asked 3 hours ago user302934 1,399

0

votes

0

answers

3

views

Is there a closed form solution for the camera position seeing points?

rotations projection computer-vision

asked 3 hours ago nickponline 375

4

votes

0

answers

15

views

Can two elliptic isometreis generate a free group?

group-theory hyperbolic-geometry free-groups

asked 6 hours ago ThePiper 307

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