The signed-multiset package
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.
|Versions||0.1, 0.2, 0.2.0.1, 0.3, 0.3.0.1|
|Dependencies||base (≥4.5.0 & <4.7), containers (≥0.4.2 & <0.6)|
|Copyright||(c) 2012 Stefan Holdermans|
|Upload date||Tue Mar 19 21:06:45 UTC 2013|