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ISSAC
2007
Springer
94views Mathematics» more  ISSAC 2007»
14 years 4 months ago
Faster algorithms for the characteristic polynomial
A new randomized algorithm is presented for computing the characteristic polynomial of an n × n matrix over a field. Over a sufficiently large field the asymptotic expected com...
Clément Pernet, Arne Storjohann
COMPGEOM
2010
ACM
14 years 3 months ago
Better bounds on the union complexity of locally fat objects
We prove that the union complexity of a set of n constantcomplexity locally fat objects (which can be curved and/or non-convex) in the plane is O(λt+2(n) log n), where t is the m...
Mark de Berg
JVCIR
2007
96views more  JVCIR 2007»
13 years 10 months ago
Image decomposition combining staircase reduction and texture extraction
This paper proposes a natural and efficient way to achieve staircase reduction in texture extraction models of image processing. Moreover, we propose a precise framework for this ...
Tony F. Chan, Selim Esedoglu, Frederick E. Park
JSYML
2000
48views more  JSYML 2000»
13 years 10 months ago
Two Consistency Results on Set Mappings
It is consistent that there is a set mapping from the four-tuples of n into the finite subsets with no free subsets of size tn for some natural number tn. For any n < it is con...
Péter Komjáth, Saharon Shelah
CSR
2009
Springer
14 years 5 months ago
New Plain-Exponential Time Classes for Graph Homomorphism
A homomorphism from a graph G to a graph H (in this paper, both simple, undirected graphs) is a mapping f : V (G) → V (H) such that if uv ∈ E(G) then f(u)f(v) ∈ E(H). The pro...
Magnus Wahlström