论文标题
一种灵活的方法,用于枚举下盘及其在Dedekind编号上的应用
A Flexible Approach for the Enumeration of Down-Sets and its Application on Dedekind Numbers
论文作者
论文摘要
我们引入了一种灵活的方法,用于枚举有限poset的下集,并通过计算Dedekind数字$ b(5)= 7581 $和$ b(6)= 7828354 $进行测试。对于$ b(5)$的计算,我们开发了两种方法,其中第一种方法(没有预先计算)需要对80个POSET的简单评估,第二个POSET(预计预定率)为34个POSET。通过评估245个POSET来完成$ b(6)$(带有预表现)的计算。
We introduce a flexible approach for the enumeration of the down-sets of a finite poset and test it with the calculation of the Dedekind numbers $b(5) = 7581$ and $b(6) = 7828354$. For the calculation of $b(5)$, we develop two methods of which the first one (without pre-calculations) requires simple evaluation of 80 posets and the second one (with pre-calculations) of 34 posets. The calculation of $b(6)$ (with pre-calculations) is done by evaluating 245 posets.