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Andrei Petrov's user avatar
Andrei Petrov's user avatar
Andrei Petrov's user avatar
Andrei Petrov
  • Member for 7 years, 6 months
  • Last seen more than 6 years ago
5 votes
5 answers
167 views

Find a limit, no Taylor formula

4 votes
2 answers
209 views

Limit of ratio ${f(x)\over x}$ equal to limit of difference $f(x+1)-f(x)$.

3 votes
1 answer
1k views

Integral inequality between a function and its derivative

2 votes
1 answer
51 views

Union of closed sets in $\mathbb{R}^n$ feature

2 votes
1 answer
96 views

Minimal perimeter

1 vote
2 answers
96 views

Find a polygonal path of minimal length

1 vote
1 answer
753 views

Mean value theorem for integrals on (a,b)

1 vote
1 answer
147 views

Prove that square has the minimal area of all tangential quadrilaterals

0 votes
1 answer
161 views

Draw a line that cuts a triangle with minimal area

0 votes
1 answer
66 views

Finite product of complex functions

0 votes
0 answers
39 views

Sequence of continuous functions convergent to continuous by each variable function in $\mathbb{R}^2$