Independence results about context-free languages and lower bounds
β Scribed by Juris Hartmanis
- Book ID
- 113162755
- Publisher
- Elsevier Science
- Year
- 1985
- Tongue
- English
- Weight
- 575 KB
- Volume
- 20
- Category
- Article
- ISSN
- 0020-0190
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
We investigate lower bounds on the size of K 4 -free graphs. For several ranges of independence relative to order and for graphs with maximum degree 3 and 4, we find sharp lower bounds. We also evaluate Ramsey-type numbers over the classes of graphs with maximum degree 3 and with maximum degree 4.
It is well known that a context-free language defined over a one-letter alphabet is regular. This implies that unary context-free grammars and unary pushdown automata can be transformed into equivalent finite automata. In this paper, we study these transformations from a descriptional complexity poi