Resolution lower bounds for the weak functional pigeonhole principle
โ Scribed by Alexander A. Razborov
- Publisher
- Elsevier Science
- Year
- 2003
- Tongue
- English
- Weight
- 243 KB
- Volume
- 303
- Category
- Article
- ISSN
- 0304-3975
No coin nor oath required. For personal study only.
โฆ Synopsis
We show that every resolution proof of the functional version FPHP m n of the pigeonhole principle (in which one pigeon may not split between several holes) must have size exp( (n=(log m) 2 )). This implies an exp( (n 1=3 )) bound when the number of pigeons m is arbitrary.
๐ SIMILAR VOLUMES
## Abstract It is well known that __S__ ^1^~2~ cannot prove the injective weak pigeonhole principle for polynomial time functions unless RSA is insecure. In this note we investigate the provability of the surjective (dual) weak pigeonhole principle in __S__ ^1^~2~ for provably weaker function class
We show that the known bounded-depth proofs of the Weak Pigeonhole Principle PHP 2n n in size n O(log(n)) are not optimal in terms of size. More precisely, we give a size-depth trade-o upper bound: there are proofs of size n O(d(log(n)) 2=d ) and depth O(d). This solves an open problem of Maciel et