User Blind

11 votes

3 answers

1k views

Stable strict local minimum implies local convexity

asked Sep 7, 2018 at 17:42

8 votes

1 answer

370 views

Problem of three circles

geometry contest-math euclidean-geometry triangles plane-geometry

asked Dec 30, 2018 at 5:10

8 votes

0 answers

439 views

Stable local minimizers of functions on a Banach space

functional-analysis optimization banach-spaces lipschitz-functions

asked Apr 13, 2017 at 20:01

6 votes

1 answer

182 views

References for hemicontinuity?

functional-analysis vector-spaces convex-analysis convex-optimization

asked Jan 31, 2015 at 23:59

6 votes

1 answer

275 views

weak star and strong convergence of net in Banach spaces

general-topology functional-analysis weak-convergence nets weak-topology

asked Apr 3, 2020 at 20:56

5 votes

1 answer

207 views

Equivalence of system of nonlinear equations

linear-algebra systems-of-equations

asked Jul 3, 2015 at 0:27

5 votes

1 answer

134 views

Strongest topology makes unit ball compact

general-topology functional-analysis

asked Apr 14, 2015 at 5:23

5 votes

3 answers

1k views

proving lines are perpendicular

geometry

asked Jun 14, 2017 at 3:03

5 votes

1 answer

390 views

Elementary properties of gradient systems

ordinary-differential-equations differential-geometry dynamical-systems

asked May 27, 2016 at 19:16

4 votes

1 answer

219 views

References for gradient systems

ordinary-differential-equations dynamical-systems

asked May 27, 2016 at 18:32

4 votes

3 answers

298 views

On the existence a symmetric positive definite matrix

linear-algebra

asked Nov 25, 2019 at 2:14

4 votes

3 answers

143 views

Extremal problem with positive integer numbers

number-theory inequality

asked Dec 27, 2017 at 6:55

3 votes

1 answer

241 views

Inequality with integer numbers

number-theory inequality radicals irrational-numbers integers

asked Dec 25, 2017 at 7:45

3 votes

1 answer

147 views

Solving $(x^2+4x+3)\sqrt{x+2}+(x^2+9x+18)\sqrt{x+7}\geq x^3+10x^2+33x+36$

algebra-precalculus inequality contest-math

asked Apr 17 at 6:57

3 votes

1 answer

788 views

Constructing a quasiconvex function

functions convex-analysis convex-optimization

asked Apr 5, 2015 at 6:00

2 votes

1 answer

76 views

On the greatest norm element of weakly compact set

functional-analysis normed-spaces

asked Jan 28, 2015 at 10:43

2 votes

0 answers

50 views

References for a notion related to radially lower semicontinuity

real-analysis functions

asked Apr 18, 2015 at 8:40

2 votes

1 answer

276 views

Algebraic dual space of $c_{00}$

linear-algebra functional-analysis

asked Jan 8, 2016 at 4:25

2 votes

1 answer

49 views

Constructing matrix and vector satisfying system of linear equations

linear-algebra linear-transformations transformation rotations

asked Nov 25, 2016 at 19:45

2 votes

1 answer

841 views

Strict minimizer versus strong minimizer

functions optimization banach-spaces

asked Mar 21, 2017 at 14:46

2 votes

5 answers

580 views

Compare sum of radicals

algebra-precalculus radicals number-comparison

asked Dec 19, 2017 at 16:10

1 vote

1 answer

95 views

Find $(a,b)$ such that $(a^2+b)(a+b^2)=2^n$.

number-theory

asked Dec 25, 2017 at 7:31

1 vote

0 answers

63 views

On the superjet conception of Crandall, Ishii and Lions

real-analysis partial-derivative

asked Nov 22, 2016 at 18:26

1 vote

0 answers

54 views

Criteria for monotonicity of one-variable functions

functions inequality elementary-functions

asked Sep 7, 2018 at 22:16

1 vote

1 answer

97 views

Properties of trajectories generated by subgradient dynamical system

ordinary-differential-equations convex-analysis

asked Jun 29, 2016 at 21:23

1 vote

3 answers

108 views

Radical equation $\frac{1}{\sqrt{2x-1}}+\frac{1}{\sqrt[4]{4x-3}}=\frac{2}{3}$

real-analysis

asked Sep 30, 2017 at 15:07

1 vote

3 answers

60 views

On the decreasing sequences

real-analysis sequences-and-series

asked Nov 29, 2015 at 9:38

1 vote

1 answer

296 views

Degree of interpolation polynomial

linear-algebra polynomials

asked Dec 1, 2015 at 10:07

1 vote

1 answer

236 views

Quasiconvex functions

functions convex-analysis special-functions

asked Mar 28, 2015 at 12:56

1 vote

0 answers

151 views

Linear programming in Hilbert spaces

convex-analysis infinitesimals

asked May 8, 2015 at 9:09

Stack Exchange Network

current community

your communities

more stack exchange communities

54 Questions

Stable strict local minimum implies local convexity

Problem of three circles

Stable local minimizers of functions on a Banach space

References for hemicontinuity?

weak star and strong convergence of net in Banach spaces

Equivalence of system of nonlinear equations

Strongest topology makes unit ball compact

proving lines are perpendicular

Elementary properties of gradient systems

References for gradient systems

On the existence a symmetric positive definite matrix

Extremal problem with positive integer numbers

Inequality with integer numbers

Solving $(x^2+4x+3)\sqrt{x+2}+(x^2+9x+18)\sqrt{x+7}\geq x^3+10x^2+33x+36$

Constructing a quasiconvex function

On the greatest norm element of weakly compact set

References for a notion related to radially lower semicontinuity

Algebraic dual space of $c_{00}$

Constructing matrix and vector satisfying system of linear equations

Strict minimizer versus strong minimizer

Compare sum of radicals

Find $(a,b)$ such that $(a^2+b)(a+b^2)=2^n$.

On the superjet conception of Crandall, Ishii and Lions

Criteria for monotonicity of one-variable functions

Properties of trajectories generated by subgradient dynamical system

Radical equation $\frac{1}{\sqrt{2x-1}}+\frac{1}{\sqrt[4]{4x-3}}=\frac{2}{3}$

On the decreasing sequences

Degree of interpolation polynomial

Quasiconvex functions

Linear programming in Hilbert spaces