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ESA
2009
Springer
74views Algorithms» more  ESA 2009»
15 years 9 months ago
On Inducing Polygons and Related Problems
Bose et al. [2] asked whether for every simple arrangement A of n lines in the plane there exists a simple n-gon P that induces A by extending every edge of P into a line. We prov...
Eyal Ackerman, Rom Pinchasi, Ludmila Scharf, Marc ...
RECOMB
2007
Springer
15 years 8 months ago
Parts of the Problem of Polyploids in Rearrangement Phylogeny
Abstract. Genome doubling simultaneously doubles all genetic markers. Genome rearrangement phylogenetics requires that all genomes analyzed have the same set of orthologs, so that ...
Chunfang Zheng, Qian Zhu, David Sankoff
COMBINATORICS
2007
55views more  COMBINATORICS 2007»
15 years 2 months ago
A Note on a Problem of Hilliker and Straus
For a prime p and a vector ¯α = (α1, . . . , αk) ∈ Zk p let f (¯α, p) be the largest n such that in each set A ⊆ Zp of n elements one can find x which has a unique repr...
Miroslawa Janczak
JCT
2007
95views more  JCT 2007»
15 years 2 months ago
Codegree problems for projective geometries
The codegree density γ(F) of an r-graph F is the largest number γ such that there are F-free r-graphs G on n vertices such that every set of r−1 vertices is contained in at le...
Peter Keevash, Yi Zhao
JACM
2002
122views more  JACM 2002»
15 years 2 months ago
Cosmological lower bound on the circuit complexity of a small problem in logic
An exponential lower bound on the circuit complexity of deciding the weak monadic second-order theory of one successor (WS1S) is proved. Circuits are built from binary operations, ...
Larry J. Stockmeyer, Albert R. Meyer