User jjepsuomi

2

votes

1

answer

637

views

Are some of the axioms of a norm of a vector space unnecessary?

Jan 9 '16 at 21:36 Jendrik Stelzner 10.5k

2

9

votes

2

answers

1k

views

Injectivity of $A-\lambda I$

linear-algebra matrices eigenvalues-eigenvectors determinant

Dec 29 '15 at 14:13 parsiad 22.2k

1

vote

1

answer

543

views

How to solve the transcendental equation $\frac{\zeta'(\alpha)}{\zeta(\alpha)}=-\frac{1}{n}\sum_{i=1}^n\ln x_i$

numerical-methods

Dec 15 '15 at 16:20 Community♦ 1

-1

votes

1

answer

771

views

Change of variables in probability homework problem

probability integration multivariable-calculus spheres density-function

Dec 10 '15 at 10:07 Community♦ 1

1

0

votes

1

answer

256

views

How to calculate the integral $\int_0^\infty \exp\left(-\frac{x^2}{2\sigma^2}\right)x^{d-1}\,dx$

calculus integration

Dec 9 '15 at 23:24 jjepsuomi 7,581

1

vote

1

answer

61

views

Proving a claim $|c_n e^{in\theta}| = |c_n|$

fourier-series absolute-value

Nov 24 '15 at 19:27 Michael Albanese 81k

1

vote

1

answer

45

views

Belongs to / subset problem in topology

general-topology

Nov 13 '15 at 13:58 Henno Brandsma 192k

1

2

votes

1

answer

51

views

Why does $\frac{\textbf{g}^T\textbf{d}}{\textbf{d}^T\textbf{H}\textbf{d}}$ give the maximum of function $\mathcal{D}(\textbf{x}+\lambda\textbf{d})$

calculus nonlinear-optimization newton-raphson

May 15 '15 at 0:54 mvw 33k

1

vote

1

answer

763

views

Constructing canonical tableau for a linear programming problem involving SVM

optimization linear-programming simplex

May 12 '15 at 7:29 borisd 121

1

3

votes

1

answer

1k

views

How to project gradient vector to subspace defined by linear constraints

linear-algebra optimization convex-optimization nonlinear-optimization

May 11 '15 at 10:26 littleO 41.6k

1

0

votes

1

answer

357

views

How to determine the optimal step size in a quadratic function optimization

optimization nonlinear-optimization quadratic-programming

May 5 '15 at 18:04 guille_NP 86

1

0

votes

1

answer

2k

views

Solving an optimization problem with KKT-conditions

optimization karush-kuhn-tucker

May 4 '15 at 15:31 guille_NP 86

0

votes

0

answers

50

views

Interpretation of a weakly compact set of functions

general-topology functional-analysis

Apr 28 '15 at 12:03 jjepsuomi 7,581

1

vote

1

answer

1k

views

Find the smallest root of the function $e^{-x} = \sin (x)$

functions numerical-methods roots

Apr 19 '15 at 14:28 nbro 5,456

2

votes

1

answer

8k

views

Converting linear programming problems into standard form

linear-programming

Apr 16 '15 at 13:12 ElPR3 66

1

vote

2

answers

717

views

How to minimize the function $f(x,y) = x^2 + \frac{9}{4}y^2 + 3xy -2x-2y \;\;\;$ s.t. $x,y \geq 0$

calculus optimization

Mar 31 '15 at 11:29 robjohn♦ 307k

3

7

votes

2

answers

3k

views

Spatial angles in higher dimensions

geometry

Mar 9 '15 at 10:56 AB Balbuena 285

0

votes

1

answer

93

views

Proving that $\sim$ is an equivalence relation

order-theory

Mar 6 '15 at 11:13 Mauro ALLEGRANZA 83.6k

1

vote

2

answers

188

views

How to solve differential equation $y'(x)^2+y(x)y''(x)=0$

ordinary-differential-equations

Feb 26 '15 at 15:59 Surb 53.4k

0

votes

4

answers

145

views

How to calculate the shortest distance between $x^2$ and $2x-6$

calculus geometry

Feb 23 '15 at 19:14 Math-fun 8,616

1

2

votes

1

answer

2k

views

Solving a functional problem with break points

calculus-of-variations

Feb 18 '15 at 14:29 jjepsuomi 7,581

2

votes

2

answers

56

views

Solving the differential equation $\frac{y'}{x\sqrt{1+y'^2}}=C$

ordinary-differential-equations

Feb 18 '15 at 13:13 Narasimham 32.4k

2

1

vote

0

answers

197

views

Understanding derivation in Calculus of Variations book

calculus calculus-of-variations

Feb 16 '15 at 9:17 jjepsuomi 7,581

1

vote

3

answers

1k

views

Conditional probability problem of three choices [duplicate]

probability

Feb 10 '15 at 11:08 drhab 134k

0

votes

1

answer

58

views

Change of variables for a double integral formula

calculus integration

Feb 9 '15 at 11:34 Timotej 1,646

1

5

votes

1

answer

1k

views

Proving that a metric is non-negative

metric-spaces

Feb 3 '15 at 13:51 ILoveMath 9,500

1

vote

1

answer

78

views

Where does the $\mathcal{O}$-term come from in Taylor series?

calculus taylor-expansion

Feb 2 '15 at 8:00 Daniel McLaury 22.4k

0

votes

1

answer

294

views

Differentiation under the integral sign problem

calculus-of-variations

Feb 1 '15 at 11:23 Siminore 32.8k

4

votes

1

answer

41

views

Why does $\int_b^{b+\Delta b}f(x)\;dx=f(b)\Delta b+\mathcal{O}(\Delta b^2)$

calculus integration

Feb 1 '15 at 0:15 Mufasa 5,208

1

vote

1

answer

2k

views

Solving an underdetermined system of equations

linear-algebra

Jan 31 '15 at 19:46 Brian Fitzpatrick 24.6k

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261 Questions

Are some of the axioms of a norm of a vector space unnecessary?

Injectivity of $A-\lambda I$

How to solve the transcendental equation $\frac{\zeta'(\alpha)}{\zeta(\alpha)}=-\frac{1}{n}\sum_{i=1}^n\ln x_i$

Change of variables in probability homework problem

How to calculate the integral $\int_0^\infty \exp\left(-\frac{x^2}{2\sigma^2}\right)x^{d-1}\,dx$

Proving a claim $|c_n e^{in\theta}| = |c_n|$

Belongs to / subset problem in topology

Why does $\frac{\textbf{g}^T\textbf{d}}{\textbf{d}^T\textbf{H}\textbf{d}}$ give the maximum of function $\mathcal{D}(\textbf{x}+\lambda\textbf{d})$

Constructing canonical tableau for a linear programming problem involving SVM

How to project gradient vector to subspace defined by linear constraints

How to determine the optimal step size in a quadratic function optimization

Solving an optimization problem with KKT-conditions

Interpretation of a weakly compact set of functions

Find the smallest root of the function $e^{-x} = \sin (x)$

Converting linear programming problems into standard form

How to minimize the function $f(x,y) = x^2 + \frac{9}{4}y^2 + 3xy -2x-2y \;\;\;$ s.t. $x,y \geq 0$

Spatial angles in higher dimensions

Proving that $\sim$ is an equivalence relation

How to solve differential equation $y'(x)^2+y(x)y''(x)=0$

How to calculate the shortest distance between $x^2$ and $2x-6$

Solving a functional problem with break points

Solving the differential equation $\frac{y'}{x\sqrt{1+y'^2}}=C$

Understanding derivation in Calculus of Variations book

Conditional probability problem of three choices [duplicate]

Change of variables for a double integral formula

Proving that a metric is non-negative

Where does the $\mathcal{O}$-term come from in Taylor series?

Differentiation under the integral sign problem

Why does $\int_b^{b+\Delta b}f(x)\;dx=f(b)\Delta b+\mathcal{O}(\Delta b^2)$

Solving an underdetermined system of equations