600 search results - page 1 / 120 » Problems and results in extremal combinatorics - II |
CPM
2008
Springer
13 years 6 months ago
2008
Springer
CPM
2004
Springer
13 years 10 months ago
2004
Springer
COMBINATORICS
2007
13 years 4 months ago
2007
We refine previous results to provide examples, and in some cases precise classifications, of extremal subsets of {1, ..., n} containing no solutions to a wide class of non-inva...
BSL
2000
13 years 4 months ago
2000
We recall the notions of weak and strong Euler characteristics on a first order structure and make explicit the notion of a Grothendieck ring of a structure. We define partially or...
COMBINATORICS
2000
13 years 4 months ago
2000
We find a generating function expressed as a continued fraction that enumerates ordered trees by the number of vertices at different levels. Several Catalan problems are mapped to...