Optimum basis of finite convex geometry
Optimum basis of finite convex geometry
复制标题
有限凸几何的最优基
DOI:
10.1016/j.dam.2017.06.009
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发表时间:
2012
期刊:
影响因子:
--
通讯作者:
K. Adaricheva
中科院分区:
文献类型:
--
作者:
K. Adaricheva
Convex geometries form a subclass of closure systems with unique criticals, or U C-systems. We show that the F-basis introduced in Adaricheva and Nation (2014) for U C-systems, becomes optimum in convex geometries, in two essential parts of the basis: right sides (conclusions) of binary implications and left sides (premises) of non-binary ones. The right sides of non-binary implications can also be optimized, when the convex geometry either satisfies the Carousel property, or does not have D-cycles. The latter generalizes a result of PL Hammer and A. Kogan for acyclic Horn Boolean functions. Convex geometries of order convex subsets in a poset also have tractable optimum basis. The problem of tractability of optimum basis in convex geometries in general remains to be open.
影响因子:
1.8
作者:
H. Yoshikawa;H. Hirai;and K. Makino
通讯作者:
and K. Makino