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» Logic of Proofs for Bounded Arithmetic
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CSL
2007
Springer
15 years 3 months ago
Unbounded Proof-Length Speed-Up in Deduction Modulo
In 1973, Parikh proved a speed-up theorem conjectured by G¨odel 37 years before: there exist arithmetical formulæ that are provable in first order arithmetic, but whose shorter ...
Guillaume Burel
JSYML
2008
109views more  JSYML 2008»
14 years 9 months ago
Closed fragments of provability logics of constructive theories
In this paper we give a new proof of the characterization of the closed fragment of the provability logic of Heyting's Arithmetic. We also provide a characterization of the c...
Albert Visser
AML
2010
87views more  AML 2010»
14 years 9 months ago
On the form of witness terms
We investigate the development of terms during cut-elimination in first-order logic and Peano arithmetic for proofs of existential formulas. The form of witness terms in cut-free p...
Stefan Hetzl
CSL
2000
Springer
15 years 1 months ago
Bounded Arithmetic and Descriptive Complexity
We study definability of languages in arithmetic and the free monoid by bounded versions of fixed-point and transitive-closure logics. In particular we give logical characterisat...
Achim Blumensath