RECONSTRUCTION OF BINARY RELATIONS FROM THEIR RESTRICTIONS OF CARDINALITY 2, 3, 4 AND (N-1) .1.

被引:45
|
作者
LOPEZ, G [1 ]
RAUZY, C [1 ]
机构
[1] UNIV PROVENCE, F-13001 MARSEILLE, FRANCE
关键词
RECONSTRUCTIBILITY OF RELATIONS; RECONSTRUCTION CONJECTURE;
D O I
10.1002/malq.19920380104
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
We prove that any binary relation with underlying set (base) E with cardinality n > 6 is reconstructible from its restrictions of cardinality 2, 3, 4 and (n - 1). In part I we characterize relations R and R' on the same base E such that R/X and R'/X are isomorphic for every subset X of E with cardinality 2, 3, 4. In part II we shall prove that R and R' are isomorphic as soon as n > 6 when R/X and R/X' are isomorphic for every subset X of E with cardinality 2, 3, 4 and (n - 1).
引用
收藏
页码:27 / 37
页数:11
相关论文
共 50 条