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Electronic Colloquium on Computational Complexity

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REPORTS > AUTHORS > JOSE' D. P. ROLIM:
All reports by Author Jose' D. P. Rolim:

TR00-053 | 5th May 2000
Alexander E. Andreev, Andrea E. F. Clementi, Paolo Penna, Jose' D. P. Rolim

Parallel Read Operations Without Memory Contention

We address the problem of organizing a set $T$ of shared data into
the memory modules of a Distributed Memory Machine (DMM) in order
to minimize memory access conflicts (i.e. memory contention)
during read operations.
Previous solutions for this problem can be found as fundamental ... more >>>


TR97-053 | 10th November 1997
Alexander E. Andreev, J. L. Baskakov, Andrea E. F. Clementi, Jose' D. P. Rolim

Small Random Sets for Affine Spaces and Better Explicit Lower Bounds for Branching Programs

Revisions: 2

We show the following Reduction Lemma: any
$\epsilon$-biased sample space with respect to (Boolean) linear
tests is also $2\epsilon$-biased with respect to
any system of independent linear tests. Combining this result with
the previous constructions of $\epsilon$-biased sample space with
respect to linear tests, we obtain the first efficient
more >>>


TR97-029 | 20th August 1997
Pavol Duris, Juraj Hromkovic, Jose' D. P. Rolim, Georg Schnitger

On the Power of Las Vegas for One-way Communication Complexity, Finite Automata, and Polynomial-time Computations

The study of the computational power of randomized
computations is one of the central tasks of complexity theory. The
main goal of this paper is the comparison of the power of Las Vegas
computation and deterministic respectively nondeterministic
computation. We investigate the power of Las Vegas computation for ... more >>>


TR96-055 | 22nd October 1996
Alexander E. Andreev, Andrea E. F. Clementi, Jose' D. P. Rolim

Hitting Properties of Hard Boolean Operators and their Consequences on BPP

Revisions: 1 , Comments: 1

We present the first worst-case hardness conditions
on the circuit complexity of EXP functions which are
sufficient to obtain P=BPP. In particular, we show that
from such hardness conditions it is possible to construct
quick Hitting Sets Generators with logarithmic prize.
... more >>>


TR96-029 | 16th April 1996
Alexander E. Andreev, Andrea E. F. Clementi, Jose' D. P. Rolim

Towards efficient constructions of hitting sets that derandomize BPP

The efficient construction of Hitting Sets for non trivial classes
of boolean functions is a fundamental problem in the theory
of derandomization. Our paper presents a new method to efficiently
construct Hitting Sets for the class of systems of boolean linear
functions. Systems of boolean linear functions ... more >>>


TR95-061 | 27th November 1995
Alexander E. Andreev, Andrea E. F. Clementi, Jose' D. P. Rolim

Hitting sets derandomize BPP

Revisions: 1

We show that hitting sets can derandomize any BPP-algorithm.
This gives a positive answer to a fundamental open question in
probabilistic algorithms. More precisely, we present a polynomial
time deterministic algorithm which uses any given hitting set
to approximate the fractions of 1's in the ... more >>>




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