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Formal & Physical Sciences MathematicsENNew results on incompleteness and ordinal analysisJames WalshNovember 11, 2023 103 min★ ★ ★ ★ ☆ 4/5Proof TheoryIncompletenessOrdinal Analysis
Formal & Physical Sciences MathematicsENGoodstein walks and Gödel incompletenessDavid Fernández-DuqueOctober 23, 2023 97 min★ ★ ★ ★ ☆ 4/5GoodsteinGödelIncompleteness
Formal & Physical Sciences MathematicsENLecture series on concrete incompleteness-2: Proof theory of Peano ArithmeticProf. Andreas WeiermannAugust 5, 2023 131 min★ ★ ★ ★ ★ 5/5Proof TheoryPeano ArithmeticTransfinite Induction
Formal & Physical Sciences MathematicsENOn concrete incompleteness-4: Friedman style independence results for ordinals and finite treesAndreas WeiermannAugust 4, 2023 111 min★ ★ ★ ★ ☆ 4/5IncompletenessOrdinalsFinite Trees
Formal & Physical Sciences MathematicsENLecture series on concrete incompleteness-5: Phase transitionsAndreas WeiermannAugust 4, 2023 145 min★ ★ ★ ★ ☆ 4/5Concrete IncompletenessPhase TransitionsProof Theory
Formal & Physical Sciences MathematicsENLecture series on concrete incompleteness-3: Paris Harrington theoremProf. Andreas WeiermannAugust 4, 2023 109 min★ ★ ★ ★ ☆ 4/5Paris-Harrington TheoremIncompletenessRamsey Theory
Formal & Physical Sciences MathematicsENLecture series on concrete incompleteness-1: Cut elimination theoremAndreas WeiermannAugust 4, 2023 104 min★ ★ ★ ★ ☆ 4/5Proof TheoryCut EliminationSequent Calculus
Formal & Physical Sciences MathematicsENSoundness SpectraJuan P. AguileraJune 17, 2023 121 min★ ★ ★ ★ ☆ 4/5Proof TheoryOrdinal AnalysisDilators
Formal & Physical Sciences MathematicsENOn the (non)existence of proof sytems in universal proof theoryRosalie IemhoffMay 2, 2023 120 min★ ★ ★ ★ ☆ 4/5Proof TheorySequent CalculusUniversal Proof Theory
Formal & Physical Sciences MathematicsENThe Art of Ordinal AnalysisProf. Michael RathjenDecember 21, 2022 109 min★ ★ ★ ★ ★ 5/5Proof TheoryOrdinal AnalysisMathematical Logic
Formal & Physical Sciences MathematicsENEssential Hereditary UndecidabilityAlbert VisserDecember 18, 2022 106 min★ ★ ★ ★ ☆ 4/5LogicUndecidabilityGödel
Formal & Physical Sciences MathematicsENNormal forms of proofs in natural deduction II: complexityProf. Helmut SchwichtenbergNovember 19, 2022 108 min★ ★ ★ ★ ☆ 4/5Proof TheoryNatural DeductionNormalization
Formal & Physical Sciences MathematicsENNormal forms of proofs in natural deduction I: existence and uniquenessProf. Helmut SchwichtenbergNovember 12, 2022 113 min★ ★ ★ ★ ★ 5/5Proof TheoryNatural DeductionNormal Forms
Formal & Physical Sciences MathematicsENThe Provability of Consistency: Debunking the MythProf. Sergei ArtemovApril 15, 2022 129 min★ ★ ★ ★ ☆ 4/5Gödel's Incompleteness TheoremsPeano ArithmeticConsistency Proofs
Formal & Physical Sciences MathematicsENWhat is concrete incompleteness?Colin McLartyDecember 23, 2021 160 min★ ★ ★ ★ ☆ 4/5IncompletenessGödelHilbert
Formal & Physical Sciences MathematicsENJuan P. Aguilera: The Pi^1_2 Consequences of a theoryJuan P. AguileraAugust 31, 2021 40 min★ ★ ★ ★ ☆ 4/5Proof TheoryOrdinal AnalysisDilators
Formal & Physical Sciences MathematicsENSaul Aaron Kripke: A Model-Theoretic Approach to Gödel’s TheoremSaul Aaron KripkeAugust 30, 2021 29 min★ ★ ★ ★ ★ 5/5Gödel's TheoremModel TheoryLogic
Formal & Physical Sciences MathematicsENTaishi Kurahashi: Inclusions between quantified provability logicsTaishi KurahashiAugust 26, 2021 56 min★ ★ ★ ★ ☆ 4/5Provability LogicModal LogicArithmetic
Formal & Physical Sciences MathematicsENPavel Pudlák: Incompleteness theorems for weak theories of arithmetic and some stronger versionsPavel PudlákAugust 24, 2021 60 min★ ★ ★ ★ ☆ 4/5Gödel's Incompleteness TheoremsWeak ArithmeticProof Theory
Formal & Physical Sciences MathematicsENLev D. Beklemishev: Reflection Algebras and ProgressionsLev D. BeklemishevAugust 24, 2021 138 min★ ★ ★ ★ ☆ 4/5Proof TheoryReflection PrinciplesOrdinal Analysis
Formal & Physical Sciences MathematicsENAli Enayat: Tight TheoriesAli EnayatAugust 24, 2021 55 min★ ★ ★ ★ ☆ 4/5Mathematical LogicInterpretabilityPeano Arithmetic
Formal & Physical Sciences MathematicsENSam Sanders: Some theorems are more equal than others: a slow introduction to Reverse MathematicsSam SandersAugust 23, 2021 94 min★ ★ ★ ★ ☆ 4/5Reverse MathematicsMathematical LogicComputability Theory
Humanities, Social Sciences & Thought MathematicsENMatthias Baaz: Kurt Gödel and Alfred Tarski:The Extremes of LogicMatthias BaazAugust 23, 2021 57 min★ ★ ★ ★ ☆ 4/5Kurt GödelAlfred TarskiMathematical Logic
Formal & Physical Sciences MathematicsENMatthias Baaz: Incompleteness and attempted proofs of consistencyMatthias BaazAugust 23, 2021 65 min★ ★ ★ ★ ☆ 4/5GödelIncompletenessConsistency
Formal & Physical Sciences MathematicsENJoost J. Joosten: Iterated consistency, reflection and foundations of mathematicsJoost J. JoostenAugust 23, 2021 100 min★ ★ ★ ★ ☆ 4/5Gödel's Incompleteness TheoremsTuring ProgressionsProvability Logic
Formal & Physical Sciences MathematicsENDavid Fernandez-Duque: When Ackermann meets GoodsteinDavid Fernandez-DuqueAugust 23, 2021 62 min★ ★ ★ ★ ☆ 4/5Ackermann FunctionGoodstein's TheoremProof Theory
Formal & Physical Sciences MathematicsENAnton Freund: Independence without computational strengthAnton FreundAugust 23, 2021 54 min★ ★ ★ ★ ☆ 4/5IndependenceProof TheoryOrdinal Analysis
Formal & Physical Sciences MathematicsENAndreas Weiermann: Cut elimination and provably recursive functionsAndreas WeiermannAugust 23, 2021 111 min★ ★ ★ ★ ☆ 4/5Proof TheoryCut EliminationProvably Recursive Functions
Formal & Physical Sciences MathematicsENWilfried Sieg: Gödel in AProSWilfried SiegAugust 22, 2021 58 min★ ★ ★ ★ ☆ 4/5GödelAProSLogic
Formal & Physical Sciences MathematicsENSam Sanders: On two topics dear to Kurt GödelSam SandersAugust 22, 2021 55 min★ ★ ★ ★ ☆ 4/5Reverse MathematicsHigher-Order ArithmeticCoding
Formal & Physical Sciences MathematicsENSaeed Salehi: Some Fairies in the Incompleteness WonderlandSaeed SalehiAugust 22, 2021 42 min★ ★ ★ ★ ☆ 4/5GödelIncompletenessMathematical Logic
Formal & Physical Sciences MathematicsENLev D. Beklemishev: Strictly positive provability logics: recent progress and open questionsLev D. BeklemishevAugust 22, 2021 57 min★ ★ ★ ★ ☆ 4/5Provability LogicModal LogicGödel
Formal & Physical Sciences MathematicsENJulia F. Knight: Completions of PA and ω-models of KPJulia F. KnightAugust 22, 2021 44 min★ ★ ★ ★ ☆ 4/5Mathematical LogicPeano ArithmeticKripke-Platek Set Theory
Formal & Physical Sciences MathematicsENJoost J. Joosten: Minimal Logics for IncompletenessJoost J. JoostenAugust 22, 2021 65 min★ ★ ★ ★ ☆ 4/5GödelIncompletenessModal Logic
Formal & Physical Sciences MathematicsENJames Walsh: On the hierarchy of natural theoriesJames WalshAugust 22, 2021 55 min★ ★ ★ ★ ☆ 4/5Mathematical LogicConsistency StrengthReflection Principles
Formal & Physical Sciences MathematicsENHarvey Friedman: Aspects of Gödel incompletenessHarvey FriedmanAugust 22, 2021 74 min★ ★ ★ ★ ☆ 4/5Gödel IncompletenessMathematical LogicInterpretability
Formal & Physical Sciences MathematicsENFedor Pakhomov: Could we make second-incompleteness theoremside condition free?Fedor PakhomovAugust 22, 2021 45 min★ ★ ★ ☆ ☆ 3/5Gödel's Incompleteness TheoremsMathematical LogicProof Theory
Formal & Physical Sciences MathematicsENVolker Halbach: Self-reference, truth, and provabilityVolker HalbachAugust 21, 2021 123 min★ ★ ★ ★ ☆ 4/5Self-ReferenceTruthProvability
Formal & Physical Sciences MathematicsENVolker Halbach: Self-reference and intensionality in metamathematicsVolker HalbachAugust 21, 2021 59 min★ ★ ★ ★ ☆ 4/5Self-ReferenceIntensionalityMetamathematics