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| KURT GODEL On Formally Undecidable Propositions of the Principia Mathematica and Related Systems. I On Undecidable Propositions of Formal Mathematical Systems On Intuitionistic Arithmetic and Number Theory On the Length of Proofs Remarks Before the Princeton Bicentennial Conference on Problems in Mathematics ALONZO CHURCH An Unsolvable Problem of Elementary Number Theory A Note on the Entscheidungsproblem ALAN M. TURING On Computable Numbers, with an Application to the Entscheidungsproblem Systems of Logic Based on Ordinals J.B. ROSSER An Informal Exposition of Proofs of G6del's Theorem and Church's Theorem Extensions of Some Theorems of Godel and Church STEPHEN C. KLEENE General Recursive Functions of Natural Numbers Recursive Predicates and Quantifiers EMIL POST Finite Combinatory Processes. Formulation I Recursive Unsolvability of a Problem of Thue Recursively Enumerable Sets of Positive Integers and Their Decision Problems Absolutely Unsolvable Problems and Relatively Undecidable Propositions- Account of an Anticipation Index |
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