bio | website | mccme.ru/~akopyan |
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location | ||
age | ||
visits | member for | 4 years, 9 months |
seen | Jun 15 '13 at 20:18 | |
stats | profile views | 405 |
Apr 10 |
awarded | Nice Answer |
Jul 30 |
comment |
A Weak Form of Borsuk's Conjecture
Dear Prof. Kalai, how many faces in your example? |
Feb 1 |
awarded | Nice Answer |
Jul 30 |
awarded | Commentator |
Jul 30 |
comment |
(1-Lipschitz) + (length-preserving) = isometry
Here it is for high dimensional Euclidean case. cs.elte.hu/geometry/Workshop09/large_r5.pdf |
Jul 29 |
revised |
(1-Lipschitz) + (length-preserving) = isometry
deleted 2 characters in body |
Jul 29 |
answered | (1-Lipschitz) + (length-preserving) = isometry |
Jul 28 |
comment |
(1-Lipschitz) + (length-preserving) = isometry
Using that f is 1-Lipschitz and that [aa′] is a diameter, we get that β must be contained in the interior of α Why? |
Apr 12 |
comment |
Is there a generalized Feuerbach point for an irregular non-Euclidean triangle?
I've found synthetic proof for it to the two dimensional non-Euclidean case. But article is in Russian. mccme.ru/free-books/matpros/mpd.pdf#page=155 |
Dec 26 |
answered | What would you want to see at the Museum of Mathematics? |
Nov 30 |
awarded | Yearling |
Jul 11 |
comment |
Theorems in Euclidean geometry with attractive proofs using more advanced methods
This problem from IMO Shortlist. You can find solution for high school students in Prasolov book. But this problem is not so easy in hyperbolic geometry. |
Jul 11 |
comment |
Theorems in Euclidean geometry with attractive proofs using more advanced methods
Every theorem from classical geometry has short and elegant proof for "high-school students". But one can find very difficult proof which use algebraic topology or category theory. |
Jul 4 |
comment |
eBook readers for mathematics
It is not compfortable to read from netbook. iPad is good as bookreader. |
Jul 4 |
answered | eBook readers for mathematics |
Jul 4 |
revised |
Parabolic envelope of fireworks
added 2 characters in body |
Jul 4 |
revised |
Parabolic envelope of fireworks
added 8 characters in body |
Jul 4 |
answered | Parabolic envelope of fireworks |
Apr 20 |
answered | What are the most overloaded words in mathematics? |
Apr 20 |
revised |
Minimum cover of partitions of a set
deleted 2 characters in body |