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CORR
2008
Springer
118views Education» more  CORR 2008»
15 years 6 months ago
Quantifying Homology Classes
We develop a method for measuring homology classes. This involves three problems. First, we define the size of a homology class, using ideas from relative homology. Second, we defi...
Chao Chen, Daniel Freedman
EJC
2007
15 years 6 months ago
Symmetric functions, generalized blocks, and permutations with restricted cycle structure
We present various techniques to count proportions of permutations with restricted cycle structure in finite permutation groups. For example, we show how a generalized block theo...
Attila Maróti
CG
2002
Springer
15 years 6 months ago
Secret image sharing
Abstract. We present a novel hybrid method that includes a modulated scheme for reducing the distortion of the reconstructed image and a two-layered structure for grouping particip...
Chih-Ching Thien, Ja-Chen Lin
CORR
2002
Springer
123views Education» more  CORR 2002»
15 years 6 months ago
Ideal decompositions and computation of tensor normal forms
Abstract. Symmetry properties of r-times covariant tensors T can be described by certain linear subspaces W of the group ring K[Sr] of a symmetric group Sr. If for a class of tenso...
Bernd Fiedler
JAL
1998
74views more  JAL 1998»
15 years 6 months ago
A Survey of Fast Exponentiation Methods
Public-key cryptographic systems often involve raising elements of some group (e.g. GF(2n), Z/NZ, or elliptic curves) to large powers. An important question is how fast this expon...
Daniel M. Gordon