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Census algorithms for chinese remainder pseudorank

David LaingBruce Litow — 2008

RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications

We investigate the density and distribution behaviors of the chinese remainder representation pseudorank. We give a very strong approximation to density, and derive two efficient algorithms to carry out an exact count (census) of the bad pseudorank integers. One of these algorithms has been implemented, giving results in excellent agreement with our density analysis out to 5189 -bit integers.

Phenotype space and kinship assignment for the Simpson index

Bruce LitowDmitry Konovalov — 2008

RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications

We investigate the computational structure of the biological kinship assignment problem by abstracting away all biological details that are irrelevant to computation. The computational structure depends on phenotype space, which we formally define. We illustrate this approach by exhibiting an approximation algorithm for kinship assignment in the case of the Simpson index with a priori error bound and running time that is polynomial in the bit size of the population, but exponential in phenotype...

Phenotype space and kinship assignment for the simpson index

Bruce LitowDmitry Konovalov — 2007

RAIRO - Theoretical Informatics and Applications

We investigate the computational structure of the biological kinship assignment problem by abstracting away all biological details that are irrelevant to computation. The computational structure depends on phenotype space, which we formally define. We illustrate this approach by exhibiting an approximation algorithm for kinship assignment in the case of the Simpson index with error bound and running time that is polynomial in the bit size of the population, but exponential in phenotype space size. This...

Census algorithms for chinese remainder pseudorank

David LaingBruce Litow — 2007

RAIRO - Theoretical Informatics and Applications

We investigate the density and distribution behaviors of the chinese remainder representation pseudorank. We give a very strong approximation to density, and derive two efficient algorithms to carry out an exact count (census) of the bad pseudorank integers. One of these algorithms has been implemented, giving results in excellent agreement with our density analysis out to -bit integers.

Division in logspace-uniform NC 1

Andrew ChiuGeorge DavidaBruce Litow — 2001

RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications

Beame, Cook and Hoover were the first to exhibit a log-depth, polynomial size circuit family for integer division. However, the family was not logspace-uniform. In this paper we describe log-depth, polynomial size, logspace-uniform, i.e., NC 1 circuit family for integer division. In particular, by a well-known result this shows that division is in logspace. We also refine the method of the paper to show that division is in dlogtime-uniform NC 1 .

Division in logspace-uniform

Andrew ChiuGeorge DavidaBruce Litow — 2010

RAIRO - Theoretical Informatics and Applications

Beame, Cook and Hoover were the first to exhibit a log-depth, polynomial size circuit family for integer division. However, the family was not logspace-uniform. In this paper we describe log-depth, polynomial size, logspace-uniform, , circuit family for integer division. In particular, by a well-known result this shows that division is in logspace. We also refine the method of the paper to show that division is in dlogtime-uniform .

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