Modal logic
CSL '92 Selected Papers from the Workshop on Computer Science Logic
Logic of proofs for bounded arithmetic
CSR'06 Proceedings of the First international computer science conference on Theory and Applications
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In this paper we answer the question what implicit proof assertions in the provability logic GLcan be realized by explicit proof terms. In particular we show that the fragment of GLwhich can be realized by generalized proof terms of GLAis exactly S4驴 GLand equals the fragment that can be realized by proof-terms of LP. In the final sections of this paper we establish the disjunction property for GLAand give an axiomatization for GL驴 S4.