User leosenko

7

votes

1

answer

492

views

Analytical approximation of integral of Bessel function

Jul 31 '15 at 16:16 tired 11.7k

3

votes

1

answer

415

views

Dirac delta uder coordinate transformation

coordinate-systems distribution-theory dirac-delta

Aug 31 '18 at 15:40 md2perpe 18k

1

2

votes

1

answer

26

views

Cauchy-Riemann conditions implied by harmonicity and orthogonal gradients?

complex-analysis complex-numbers cauchy-riemann-equations

Jan 8 at 22:15 Conrad 16.2k

1

2

votes

4

answers

278

views

Surface integrals in spherical coordinates

calculus integration surfaces surface-integrals

Jan 1 at 16:32 Christian Blatter 210k

2

votes

2

answers

232

views

number of parameters of $SO(3)$ group

linear-algebra matrices group-theory finite-groups lie-groups

Apr 28 '20 at 19:02 eightc 372

2

votes

1

answer

79

views

Combination of probabilities for probability densities

probability statistics probability-distributions

Dec 29 '17 at 16:59 JimB 1,077

1

vote

0

answers

31

views

Convective operator in orthogonal curvilinear coordinates

calculus multivariable-calculus derivatives fluid-dynamics curvilinear-coordinates

Sep 5 at 19:13 leosenko 345

1

vote

0

answers

26

views

derivative of a sum - derivation of Boltzman equation

derivatives partial-derivative statistical-mechanics hamilton-equations

Jul 17 at 23:09 leosenko 345

1

vote

0

answers

37

views

notation in derivative multivariate function - partial and total derivatives in physics

calculus multivariable-calculus derivatives partial-derivative physics

May 2 '19 at 14:39 leosenko 345

1

vote

1

answer

29

views

$\det S = S\vec{u}\cdot(S\vec{v}\times S\vec{w})/ \vec{u}\cdot(\vec{v}\times \vec{w})$

linear-algebra proof-verification determinant volume alternative-proof

Mar 28 '19 at 16:33 G.Carugno 155

1

vote

1

answer

135

views

Intersection of sets of subsets

measure-theory elementary-set-theory

Jul 18 '18 at 20:27 Andrés E. Caicedo 73.2k

1

vote

0

answers

62

views

definition of singular endomorphism

linear-algebra abstract-algebra definition

Mar 6 '18 at 22:02 leosenko 345

1

vote

0

answers

19

views

Fourier inversion of an expression which leaves strange term

integration fourier-analysis fourier-transform

Aug 8 '17 at 22:55 Siong Thye Goh 131k

1

vote

1

answer

1k

views

Solution to $y''+k y = 0$ with complex exponentials and sine and cosine

ordinary-differential-equations

Jun 13 '17 at 18:18 badjohn 7,102

1

vote

2

answers

128

views

Definition of tensor as a map to $\mathbb{R}$ and type (1,1)

linear-algebra tensor-products tensors

Apr 26 '17 at 12:16 Ivo Terek 65.3k

1

vote

0

answers

18

views

Deviation of numerical approximation of $\alpha(u) = \frac{1}{L}\frac{{\rm d} L}{{\rm d}u}$

numerical-methods approximate-integration

Mar 14 '17 at 16:38 leosenko 345

1

vote

1

answer

57

views

$0^0$ vs $lim_{q\rightarrow 0}0^q$

real-analysis limits

Dec 3 '15 at 7:48 JJacquelin 57.5k

0

votes

0

answers

15

views

Vector field in spherical coordinates behaviour

vector-spaces vectors vector-analysis vector-fields spherical-coordinates

Dec 9 at 22:27 Sebastiano 3,912

0

votes

1

answer

85

views

Is Euclidean space a vector space and how is it different from $\mathbb{R}^n$?

linear-algebra vector-spaces affine-geometry

Jan 9 '20 at 16:00 Martin Sleziak 52.2k

0

votes

0

answers

38

views

differential geometry - center of curvature - intersection of normals

differential-geometry

Aug 7 '19 at 14:36 leosenko 345

0

votes

0

answers

85

views

Quotient space not the same as the original space

linear-algebra vector-spaces quotient-spaces quotient-group

Mar 10 '19 at 21:50 leosenko 345

1

0

votes

1

answer

542

views

Dirac Delta in polar coordinates, integrating delta from 0 to $\infty$

integration polar-coordinates distribution-theory dirac-delta

Aug 13 '18 at 18:20 md2perpe 18k

0

votes

0

answers

786

views

Cauchy theorem for triangle

complex-analysis proof-verification proof-explanation

Aug 29 '17 at 15:20 leosenko 345

0

votes

0

answers

647

views

Spherically symmetric diffusion equation ($\frac{\partial}{\partial t} T = \nabla\cdot(\alpha \nabla T)$) and its 1D counterpart

ordinary-differential-equations partial-differential-equations spherical-coordinates heat-equation

Mar 25 '17 at 13:06 leosenko 345

0

votes

0

answers

78

views

Functions on irreducible invariant subspaces

linear-algebra abstract-algebra

Mar 22 '17 at 18:12 ancientmathematician 9,193

0

votes

1

answer

40

views

Why do I get the integral $\int_0^\pi\frac{1}{1-k\cos z}{\rm d}z$ instead of $\int_0^\pi\frac{1}{1+k\cos z}{\rm d}z$?

definite-integrals

Feb 13 '17 at 4:05 David K 76.6k

0

votes

1

answer

60

views

definition of conditional probability $(p_i|\pi_k)$ and Tsallis entropy

probability probability-theory statistics entropy statistical-mechanics

Oct 21 '15 at 15:13 Graham Kemp 111k

-2

votes

1

answer

352

views

probability density vs cumulative distribution for monotonically increasing probability

probability statistics

Dec 4 '17 at 20:02 Jason 14.3k

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28 Questions

Analytical approximation of integral of Bessel function

Dirac delta uder coordinate transformation

Cauchy-Riemann conditions implied by harmonicity and orthogonal gradients?

Surface integrals in spherical coordinates

number of parameters of $SO(3)$ group

Combination of probabilities for probability densities

Convective operator in orthogonal curvilinear coordinates

derivative of a sum - derivation of Boltzman equation

notation in derivative multivariate function - partial and total derivatives in physics

$\det S = S\vec{u}\cdot(S\vec{v}\times S\vec{w})/ \vec{u}\cdot(\vec{v}\times \vec{w})$

Intersection of sets of subsets

definition of singular endomorphism

Fourier inversion of an expression which leaves strange term

Solution to $y''+k y = 0$ with complex exponentials and sine and cosine

Definition of tensor as a map to $\mathbb{R}$ and type (1,1)

Deviation of numerical approximation of $\alpha(u) = \frac{1}{L}\frac{{\rm d} L}{{\rm d}u}$

$0^0$ vs $lim_{q\rightarrow 0}0^q$

Vector field in spherical coordinates behaviour

Is Euclidean space a vector space and how is it different from $\mathbb{R}^n$?

differential geometry - center of curvature - intersection of normals

Quotient space not the same as the original space

Dirac Delta in polar coordinates, integrating delta from 0 to $\infty$

Cauchy theorem for triangle

Spherically symmetric diffusion equation ($\frac{\partial}{\partial t} T = \nabla\cdot(\alpha \nabla T)$) and its 1D counterpart

Functions on irreducible invariant subspaces

Why do I get the integral $\int_0^\pi\frac{1}{1-k\cos z}{\rm d}z$ instead of $\int_0^\pi\frac{1}{1+k\cos z}{\rm d}z$?

definition of conditional probability $(p_i|\pi_k)$ and Tsallis entropy

probability density vs cumulative distribution for monotonically increasing probability