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81
Voted
DM
2008
15 years 26 days ago
2008
Owari is an old African game that consists of cyclically ordered pits that are filled with pebbles. In a sowing move all the pebbles are taken out of one pit and distributed one b...
93
Voted
DM
2008
15 years 26 days ago
2008
By a nearlattice is meant a join-semilattice having the property that every principal filter is a lattice with respect to the semilattice order. We introduce the concept of (relat...
77
Voted
DM
2008
15 years 26 days ago
2008
The core of a game v on N, which is the set of additive games dominating v such that (N) = v(N), is a central notion in cooperative game theory, decision making and in combinator...
83
Voted
DM
2008
15 years 26 days ago
2008
Given a simple graph G on n vertices, we prove that it is possible to reconstruct several algebraic properties of the edge ideal from the deck of G, that is, from the collection o...
106
Voted
DM
2008
15 years 26 days ago
2008
In this paper we are concerned with the following question: for a semigroup S, what is the largest size of a subsemigroup T S where T has a given property? The semigroups S that w...