CSR
2008
Springer
13 years 5 months ago
2008
Springer
CSR
2008
Springer
13 years 6 months ago
2008
Springer
The universal cover TG of a connected graph G is the unique (possible infinite) tree covering G, i.e., that allows a locally bijective homomorphism from TG to G. Universal covers h...
CSR
2008
Springer
13 years 6 months ago
2008
Springer
We offer cryptanalysis of a key exchange scheme due to Stickel [11], which was inspired by the well-known Diffie-Hellman protocol. We show that Stickel's choice of platform (t...
CSR
2008
Springer
13 years 6 months ago
2008
Springer
We define a denotational semantics for Light Affine Logic (LAL) which has the property that denotations of functions are polynomial time computable by construction of the model. Th...
CSR
2008
Springer
13 years 6 months ago
2008
Springer
Abstract. Deterministic graph grammars are finite devices which generate the transition graphs of pushdown automata. We define the notion of synchronization by grammars, generalizi...
CSR
2008
Springer
13 years 6 months ago
2008
Springer
The main purpose of this paper is to show that public key encryption can be secure against the "encryption emulation" attack (on the sender's encryption) by computat...
CSR
2008
Springer
13 years 6 months ago
2008
Springer
Versus the customary preconditioners, our weakly random ones are generated more readily and for a much larger class of input matrices. Furthermore our preconditioners have a wider...
CSR
2008
Springer
13 years 6 months ago
2008
Springer
Abstract. While visibly pushdown languages properly generalise regular languages and are properly contained in deterministic context-free languages, the complexity of their members...
CSR
2008
Springer
13 years 6 months ago
2008
Springer
We discuss interesting properties of a general technique for inferring polynomial invariants for a subfamily of imperative loops, called the P-solvable loops, with assignments only...
CSR
2008
Springer
13 years 6 months ago
2008
Springer
We prove that every rational language of words indexed by linear orderings is definable in monadic second-order logic. We also show that the converse is true for the class of langu...