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Blind
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11 votes
3 answers
1k views

Stable strict local minimum implies local convexity

8 votes
1 answer
370 views

Problem of three circles

8 votes
0 answers
439 views

Stable local minimizers of functions on a Banach space

6 votes
1 answer
182 views

References for hemicontinuity?

6 votes
1 answer
275 views

weak star and strong convergence of net in Banach spaces

5 votes
1 answer
207 views

Equivalence of system of nonlinear equations

5 votes
1 answer
134 views

Strongest topology makes unit ball compact

5 votes
3 answers
1k views

proving lines are perpendicular

5 votes
1 answer
390 views

Elementary properties of gradient systems

4 votes
1 answer
219 views

References for gradient systems

4 votes
3 answers
298 views

On the existence a symmetric positive definite matrix

4 votes
3 answers
143 views

Extremal problem with positive integer numbers

3 votes
1 answer
241 views

Inequality with integer numbers

3 votes
1 answer
147 views

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

3 votes
1 answer
788 views

Constructing a quasiconvex function

2 votes
1 answer
76 views

On the greatest norm element of weakly compact set

2 votes
0 answers
50 views

References for a notion related to radially lower semicontinuity

2 votes
1 answer
276 views

Algebraic dual space of $c_{00}$

2 votes
1 answer
49 views

Constructing matrix and vector satisfying system of linear equations

2 votes
1 answer
841 views

Strict minimizer versus strong minimizer

2 votes
5 answers
580 views

Compare sum of radicals

1 vote
1 answer
95 views

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

1 vote
0 answers
63 views

On the superjet conception of Crandall, Ishii and Lions

1 vote
0 answers
54 views

Criteria for monotonicity of one-variable functions

1 vote
1 answer
97 views

Properties of trajectories generated by subgradient dynamical system

1 vote
3 answers
108 views

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

1 vote
3 answers
60 views

On the decreasing sequences

1 vote
1 answer
296 views

Degree of interpolation polynomial

1 vote
1 answer
236 views

Quasiconvex functions

1 vote
0 answers
151 views

Linear programming in Hilbert spaces