Mathematics
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Alex Ravsky
  • Member for 9 years, 2 months
  • Last seen this week
  • Lviv, Ukraine
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About

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My CV: a mathematician. My papers.

"I do not know what I may appear to the world, but to myself I seem to have been only like a boy playing on the seashore, and diverting myself in now and then finding a smoother pebble or a prettier shell than ordinary, whilst the great ocean of truth lay all undiscovered before me". Isaac Newton

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All Questions Answers
Score Newest
answer
92
How to prove every closed interval in R is compact?
Apr 21, 2013
answer
27
Graph theoretic proof: For six irrational numbers, there are three among them such that the sum of any two of them is irrational.
Jul 30, 2016
answer
23
Graph theoretic proof: For six irrational numbers, there are three among them such that the sum of any two of them is irrational.
Jul 30, 2016
answer
20
Integer function which takes every value infinitely often
Oct 30, 2016
answer
20
Do Hausdorff spaces that aren't completely regular appear in practice?
Feb 19, 2019
question
17
Is a finite group determined by the family of all its 2-generated subgroups?
Jul 16, 2013
answer
16
A chess knight's moves
Oct 25, 2016
question
15
Asymptotics of the sum of squares of binomial coefficients
Apr 24, 2013
answer
14
How to show $\{\{x\}\} \neq x$?
Apr 19, 2013
answer
12
Asymptotics of the sum of squares of binomial coefficients
Apr 27, 2013
Top Meta posts
1
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11
Bounties don't last long enough
3
Etiquette of letting a bounty expire on a question with an upvoted but incomplete answer?
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11
Non meager rectangle
9
A perfect rainbow matching in an edge-colored graph with spanning color classes
7
Convergent net in a quasi-uniform space which is not Cauchy
6
Maximal number of triple intersection points of $n$ circles
6
A rather non-$F_\sigma$ Borel set

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