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The Computer Journal
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Permutations by Interchanges

Permutations by interchanges
descriptionPublicationkeyboard_double_arrow_right Article 01 Nov 1963 English Publisher:Oxford University Press (OUP)Journal:The Computer Journal, volume 6, pages 293-298 (issn: 0010-4620, eissn: 1460-2067, Copyright policy )
Authors: B. R. Heap;

doi: 10.1093/comjnl/6.3.293

Permutations by Interchanges

Abstract

Methods for obtaining all possible permutations of a number of objects, in which each permutation differs from its predecessor only by the interchange of two of the objects, are discussed. Details of two programs which produce these permutations are given, one allowing a specified position to be filled by each of the objects in a predetermined order, the other needing the minimum of storage space in a computer.

Keywords

numerical analysis

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    selected citations
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    		 57
    popularity
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    		 Top 10%
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
57
Top 10%
Top 1%
Average
bronze