Abstract
In the past years, great attention has been payed to approximated p-adic arithmetic expressed in the form of Hensel codes and several contributions have made this p-adic arithmetic really effective, just according to this new consideration of it. However it has been shown that the appliability of p-adic arithmetic is strongly constrained by the size of rational numbers which constitutes the output of the given computation. The key idea we like to present here, it is based on the intention of getting any advantage out the variation of the prime p, choosing it as a very large number. This choise suggests a definition of a new algorithm which will benefit from a parallel execution. Thus our aim is to perform “big” rational numbers arithmetic applying the so called g-adic approach, based on the theory of g-adic numbers. This paper describes a general schema of g-adic computation and then presents two algorithms to perform the inverse mapping together with the related complexity analysis.
This work has been partially supported by M.P.I.: Progetti di Manipolazione Algebrica, Calcolo Algebrico; and by C.N.R.: Progetto Strategico Matematica computazionale.
This is a preview of subscription content, log in via an institution.
Preview
Unable to display preview. Download preview PDF.
References
Aho, Hopcroft, Ullmann: The Design and Analysis of Computer Algorithms. Addison Wesley-Publishing Company 1975.
A. Colagrossi, A. Miola: A normalization algorithm for truncated p-adic arithmetic. Eight Symposium on Computer Arithmetic, IEEE; Como 1987
K. Dittenberger: An Efficient Method for Exact Numerical Computation. Diploma Thesis University of Linz 1985.
R.T. Gregory: The use of Finite Segment P-adic Arithmetic for Exact Computation, Bit 18, 1978.
R.T.Gregory, E.V. Krishnamurthy: Methods and Applications of Error-Free Computation. Springer-Verlag 1984.
E. Horowitz: Fundamentals of Computer Algorithms. PITMAN 1978.
N. Koblitz: P-Adic Numbers, P-Adic Analysis and Zeta Functions. Springer Verlag, New York, 1977.
K. Mahler: Introduction to P-adic Numbers and their Functions. Cambridge University Press, 1973
A. Miola: Algebraic Approach to P-Adic Conversion of Rational Numbers. IPL 18, 1984.
Author information
Authors and Affiliations
Editor information
Rights and permissions
Copyright information
© 1989 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
Colagrossi, A., Limongelli, C. (1989). Big numbers p-adic arithmetic: A parallel approach. In: Mora, T. (eds) Applied Algebra, Algebraic Algorithms and Error-Correcting Codes. AAECC 1988. Lecture Notes in Computer Science, vol 357. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-51083-4_57
Download citation
DOI: https://doi.org/10.1007/3-540-51083-4_57
Published:
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-51083-3
Online ISBN: 978-3-540-46152-4
eBook Packages: Springer Book Archive