| Chomsky Hierarchy | ||
Now the following rules allow deletion of the second component of an ordered pair (i.e. composite variable) if it is adjacent to a terminal symbol.
8. 9. Once, all the second component s are deleted using the above two rules, the original input string is correctly generated. This is the correct derivation the LBA would accept the same string as it had entered one of the final states (implied by use of rule 7). It is also clear that the CSG G can generate a terminal string only if the LBA accepts it. Note that the production used here are all context-sensitive. Also, the second components donot produce the string A proof that any string |
||