& 哈斯图 例偏序集({1,2,3,4,5,6,7,8,9},R整除)和(P({a,b,c),Re)的哈斯图. 8 ta,b,ch fa,bp a,c A 哈斯图 11
哈斯图 哈斯图 11 ( ) ( )
&原 哈斯图(续) .The power set of (xy)partially ordered by inclusion,has the Hasse diagram: {xy.z} {x.y} {,z} (y.z) {y} .The set 4=(1,2,3,4,5,6,10,12,15,20,30,60 of all divisors of 60,partially ordered by divisibility,has the Hasse diagram: 哈斯图 12
哈斯图(续) 哈斯图 12