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Electronic Colloquium on Computational Complexity

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REPORTS > KEYWORD > BLUM-SHUB-SMALE MODEL:
Reports tagged with Blum-Shub-Smale model:
TR04-003 | 22nd December 2003
Pascal Koiran

Valiant's model and the cost of computing integers

Let $\tau(k)$ be the minimum number of arithmetic operations
required to build the integer $k \in \N$ from the constant 1.
A sequence $x_k$ is said to be ``easy to compute'' if
there exists a polynomial $p$ such that $\tau(x_k) \leq p(\log k)$
for all $k \geq ... more >>>


TR05-037 | 8th April 2005
Eric Allender, Peter B├╝rgisser, Johan Kjeldgaard-Pedersen, Peter Bro Miltersen

On the Complexity of Numerical Analysis

Revisions: 1 , Comments: 1

We study two quite different approaches to understanding the complexity
of fundamental problems in numerical analysis. We show that both hinge
on the question of understanding the complexity of the following problem,
which we call PosSLP:
Given a division-free straight-line program
producing an integer N, decide whether N>0.
more >>>




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