JCSS
2008
14 years 4 months ago
2008
We provide a characterization of the resolution width introduced in the context of propositional proof complexity in terms of the existential pebble game introduced in the context...
LICS
2002
IEEE
14 years 9 months ago
2002
IEEE
We introduce three formal theories of increasing strength for linear algebra in order to study the complexity of the concepts needed to prove the basic theorems of the subject. We...
ICALP
2007
Springer
14 years 10 months ago
2007
Springer
Abstract. We study – within the framework of propositional proof complexity – the problem of certifying unsatisfiability of CNF formulas under the promise that any satisfiabl...