COCO
2007
Springer
13 years 11 months ago
2007
Springer
Interactive hashing, introduced by Naor, Ostrovsky, Venkatesan and Yung (CRYPTO ’92), plays an important role in many cryptographic protocols. In particular, it is a major compo...
COCO
2007
Springer
13 years 11 months ago
2007
Springer
We give an improved explicit construction of highly unbalanced bipartite expander graphs with expansion arbitrarily close to the degree (which is polylogarithmic in the number of ...
COCO
2007
Springer
13 years 11 months ago
2007
Springer
Motivated by the study of Parallel Repetition and also by the Unique Games Conjecture, we investigate the value of the “Odd Cycle Games” under parallel repetition. Using tools...
COCO
2007
Springer
13 years 11 months ago
2007
Springer
We consider a class of two-prover interactive proof systems where each prover returns a single bit to the verifier and the verifier’s verdict is a function of the XOR of the tw...
COCO
2007
Springer
13 years 11 months ago
2007
Springer
We present a deterministic logspace algorithm for solving S-T Connectivity on directed graphs if (i) we are given a stationary distribution of the random walk on the graph in whic...
COCO
2007
Springer
13 years 11 months ago
2007
Springer
The NP machine hypothesis posits the existence of an ǫ > 0 and a nondeterministic polynomial-time Turing machine M which accepts the language 0∗ but for which no determinist...
COCO
2007
Springer
13 years 11 months ago
2007
Springer
Valiant has proposed a new theory of algorithmic computation based on perfect matchings and Pfaffians. We study the properties of matchgates—the basic building blocks in this n...
COCO
2007
Springer
13 years 11 months ago
2007
Springer
We consider the problem of counting the number of spanning trees in planar graphs. We prove tight bounds on the complexity of the problem, both in general and especially in the mo...
COCO
2007
Springer
13 years 11 months ago
2007
Springer
We make progress in understanding the complexity of the graph reachability problem in the context of unambiguous logarithmic space computation; a restricted form of nondeterminism....
COCO
2007
Springer
13 years 11 months ago
2007
Springer
A t-design for quantum states is a finite set of quantum states with the property of simulating the Haar-measure on quantum states w.r.t. any test that uses at most t copies of a...