• Lower bounds for DNF-refutations of a relativized weak pigeonhole principle 

      Atserias, Albert; Müller, Moritz; Oliva Valls, Sergi (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Text en actes de congrés
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      The relativized weak pigeonhole principle states that if at least 2n out of n2 pigeons fly into n holes, then some hole must be doubly occupied. We prove that every DNF-refutation of the CNF encoding of this principle ...
    • Lower bounds for DNF-refutations of a relativized weak pigeonhole principle 

      Atserias, Albert; Müller, Moritz; Oliva Valls, Sergi (2015-06-01)
      Article
      Accés obert
      The relativized weak pigeonhole principle states that if at least 2n out of n(2) pigeons fly into n holes, then some hole must be doubly occupied. We prove that every DNF-refutation of the CNF encoding of this principle ...
    • On the consistency of circuit lower bounds for non-deterministic time 

      Atserias, Albert; Buss, Sam; Müller, Moritz (Association for Computing Machinery (ACM), 2023)
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      We prove the first unconditional consistency result for superpolynomial circuit lower bounds with a relatively strong theory of bounded arithmetic. Namely, we show that the theory ‍V20 is consistent with the conjecture ...
    • Partially definable forcing and bounded arithmetic 

      Atserias, Albert; Müller, Moritz (2015-02-01)
      Article
      Accés obert
      We describe a method of forcing against weak theories of arithmetic and its applications in propositional proof complexity.