Vigleik Angeltveit

less info
778 reputation
47
bio website math.uchicago.edu/~vigleik
location
age
visits member for 4 years, 6 months
seen Apr 1 '11 at 18:11

Oct
14
awarded  Yearling
Jul
5
awarded  Good Answer
Oct
15
awarded  Yearling
Sep
23
awarded  Nice Answer
Oct
15
awarded  Yearling
Feb
12
awarded  Nice Answer
Nov
28
awarded  Nice Answer
Nov
28
answered Intuitive explanation to Probability question
Oct
29
awarded  Scholar
Oct
29
comment Bound on cardinality of a union
Thanks, this gives a much better estimate; maybe this is all one can reasonably say. As for motivation, an answer to this question gives an upper bound for Ramsey numbers, see the tag. (In some cases it is very close, though not better, than the best known upper bound.)
Oct
29
accepted Bound on cardinality of a union
Oct
29
awarded  Student
Oct
28
comment Bound on cardinality of a union
This bound might be negative. More generally, if the double intersections all have size N_2 that might force at least some of the triple intersections to be nonempty.
Oct
28
comment Bound on cardinality of a union
A straightforward application of inclusion-exclusion, ignoring the terms of the wrong sign, gives a lower bound. But it will generally be far from optimal.
Oct
28
asked Bound on cardinality of a union
Oct
26
answered (how) are vector bundles and homotopy groups related?
Oct
23
awarded  Supporter
Oct
23
awarded  Teacher
Oct
23
answered Is there a high-concept explanation for why characteristic 2 is special?
Oct
14
answered Deligne's conjecture (the little discs operad one)