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10 November 2024
 
  » arxiv » cond-mat/9710104

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Four-tap shift-register-sequence random-number generators
Robert M. Ziff ;
Date 10 Oct 1997
Subject Disordered Systems and Neural Networks | cond-mat.dis-nn
AffiliationUniversity of Michigan, Department of Chemical Engineering, Ann Arbor
AbstractIt is shown how correlations in the generalized feedback shift-register (GFSR) random-number generator are greatly diminished when the number of feedback taps is increased from two to four (or more) and the tap offsets are lengthened. Simple formulas for producing maximal-cycle four-tap rules from available primitive trinomials are given, and explicit three- and four-point correlations are found for some of those rules. A number of generators are also tested using a simple but sensitive random-walk simulation that relates to a problem in percolation theory. While virtually all two-tap generators fail this test, four-tap generators with offset greater than about 500 pass it, have passed tests carried out by others, and appear to be good multi-purpose high-quality random-number generators.
Source arXiv, cond-mat/9710104
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