| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 4649978 | Discrete Mathematics | 2008 | 8 Pages |
Abstract
We prove that a prime interval order, not necessarily finite, has no prime upper cover if and only if it has width two. On the other hand, we prove that every finite prime NN-free order has at least one prime upper cover.
Keywords
Related Topics
Physical Sciences and Engineering
Mathematics
Discrete Mathematics and Combinatorics
Authors
Imed Zaguia,