## Abstract In this note we consider registerβmachines with symbol manipulation capabilities. They can form words over a given alphabet in their registers by appending symbols to the strings already stored. These machines are similar to Post's normal systems and the related machineβmodels discussed
The Independence of Control Structures in Programmable Numberings of the Partial Recursive Functions
β Scribed by Gregory A. Riccardi
- Publisher
- John Wiley and Sons
- Year
- 1982
- Tongue
- English
- Weight
- 795 KB
- Volume
- 28
- Category
- Article
- ISSN
- 0044-3050
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π SIMILAR VOLUMES
A subset of vertices is a maximum independent set if no two of the vertices are joined by an edge and the subset has maximum cardinality. In this paper we answer a question posed by Herb Wilf. We show that the greatest number of maximum independent sets for a tree of n vertices is 2(n-3\* for odd n
Let P be a finite poset and let x, y e P. Let C be a finite chain. Define NS(i, j) to be the number of strict order-preserving maps to: P--~C satisfying to(x)=i and to(y)=j. Various inequalities are proved, commencing with Theorem 2: If r, s, t, u, v, w are non-negative integers then NS(r, u + v + w