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COMBINATORICS
2004
13 years 9 months ago
2004
In 1958, Richard Guy proved that the number of partitions of n into odd parts greater than one equals the number of partitions of n into distinct parts with no powers of 2 allowed...
COMBINATORICS
2004
13 years 9 months ago
2004
A natural problem in extremal combinatorics is to maximize the number of distinct subsequences for any length-n string over a finite alphabet ; this value grows exponentially, but...
COCOON
2004
Springer
14 years 1 months ago
2004
Springer
In this paper we introduce a notion of a regular expression over infinite alphabets and show that a language is definable by an infinite alphabet regular expression if and only if ...
COMBINATORICS
2004
13 years 9 months ago
2004
In this paper we bring together the areas of combinatorics and propositional satisfiability. Many combinatorial theorems establish, often constructively, the existence of positive...
COCOON
2004
Springer
14 years 1 months ago
2004
Springer
In this work, we study an extension of the k-center facility location problem, where centers are required to service a minimum of clients. This problem is motivated by requirement...