signed-multiset: Multisets with negative membership.

[ bsd3, data-structures, library ] [ Propose Tags ]

Multisets (or bags) are sets in which elements may occur more than once. The number of times an element occurs in a multiset is called its multiplicity.

This package provides an efficient implementation of so-called signed multisets (also known as hybrid sets or shadow sets), which generalise multisets by allowing for negative membership. That is, elements in a signed multiset can have negative multiplicities.

See also: Wayne D. Blizard. Negative membership. Notre Dame Journal of Formal Logic, 31(3):346--368, 1990.


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Versions [RSS] 0.1, 0.2,, 0.3,, 0.4
Change log CHANGELOG
Dependencies base (>=4.7 && <4.8), containers (>=0.4.2 && <0.6) [details]
License BSD-3-Clause
Copyright (c) 2012-2014 Stefan Holdermans
Author Stefan Holdermans
Category Data Structures
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Uploaded by StefanHoldermans at 2014-04-23T20:26:15Z
Distributions NixOS:0.4
Downloads 4019 total (32 in the last 30 days)
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