Unambiguous computation boolean hierarchies and sparse turing-complete sets.
It is known that for any class C closed under union and intersection, the Boolean closure of C, the Boolean hierarchy over C and the symmetric difference hierarchy over C all are equal. We prove that these equalities hold for any complexity class closed under intersection; in particular, they thus h...
| Veröffentlicht in: | SIAM journal on computing. 26, 3 (1997). |
|---|---|
| 1. Verfasser: | |
| Format: | Artikel |
| Sprache: | English |
| Schlagworte: |