1. A Gray Code of Ordered Trees
- Author
-
Nakano, Shin-ichi
- Subjects
Computer Science - Discrete Mathematics - Abstract
A combinatorial Gray code for a set of combinatorial objects is a sequence of all combinatorial objects in the set so that each object is derived from the preceding object by changing a small part. In this paper we design a Gray code for ordered trees with n vertices such that each ordered tree is derived from the preceding ordered tree by removing a leaf then appending a leaf elsewhere. Thus the change is just remove-and-append a leaf, which is the minimum., Comment: 14 pages
- Published
- 2022