Representation and manipulation of finite sets

Authors:
B. L. McAllister
Affiliations:
Montana State University, Bozeman, Montana
Venue:
ACM SIGAPL APL Quote Quad
Year:
1980

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Cited 2

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Abstract

A set may be represented in APL either through a vector of its elements, through a Boolean vector representing its characteristic function with respect to a pre-specified universal set, or through the re-interpretation of this Boolean vector as the binary representation of an integer. This paper discusses the use of these representations for manipulation of sets, collections of sets, and functions as they are used, for example, in topology.