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ENTCS
2008
102views more  ENTCS 2008»
13 years 7 months ago
An Algebra for Directed Bigraphs
We study the algebraic structure of directed bigraphs, a bigraphical model of computations with locations, connections and resources previously introduced as a unifying generaliza...
Davide Grohmann, Marino Miculan
ECCC
2007
144views more  ECCC 2007»
13 years 7 months ago
Algebraic Lower Bounds for Computing on Encrypted Data
In cryptography, there has been tremendous success in building primitives out of homomorphic semantically-secure encryption schemes, using homomorphic properties in a blackbox way...
Rafail Ostrovsky, William E. Skeith III
ISPEC
2005
Springer
14 years 1 months ago
A New Class of Codes for Fingerprinting Schemes
Abstract. In this paper we discuss the problem of collusion secure fingerprinting. In the first part of our contribution we prove the existence of equidistant codes that can be u...
Marcel Fernandez, Miguel Soriano, Josep Cotrina Na...
TIT
2010
90views Education» more  TIT 2010»
13 years 2 months ago
Group codes outperform binary-coset codes on nonbinary symmetric memoryless channels
Typical minimum distances and error exponents are analyzed on the 8-PSK Gaussian channel for two capacityachieving code ensembles with different algebraic structure. It is proved t...
Giacomo Como
FOCM
2006
63views more  FOCM 2006»
13 years 7 months ago
On an Isospectral Lie-Poisson System and Its Lie Algebra
In this paper we analyse the matrix differential system X = [N, X2 ], where N is skew-symmetric and X(0) is symmetric. We prove that it is isospectral and that it is endowed with ...
Anthony M. Bloch, Arieh Iserles