
Jasmin Christian Blanchette
ジャスミン・クリスチャン・ブランシェット 亚斯麦·克里斯蒂安·布兰切特


I am an assistant professor in the Theoretical Computer Science section of
the Vrije Universiteit Amsterdam, in the Netherlands.
I am also a guest researcher in the VeriDis group at Loria in Nancy, France, and in the Automation
of Logic group at the MaxPlanckInstitut für
Informatik in Saarbrücken, Germany.
I was a postdoc at the Chair for
Logic and Verification at the
Technische Universität München, Germany, which I joined in
2008 as a PhD student.
From 2000 to 2008, I worked as software engineer and documentation manager for
Trolltech (now The Qt Company) in Oslo, Norway.
My research focuses on the use of firstorder automatic
theorem provers and model finders to find proofs and counterexamples in
higherorder logic (Sledgehammer, Nitpick,
Nunchaku,
and Matryoshka).
Another aspect of my work is the development of foundational definitional mechanisms for
(co)datatypes and (co)recursive functions.
I am also interested in formalizing classic results and modern research in
automated reasoning (IsaFoL)
and number theory (Lean Forward).
News

I will give an invited talk about formalizing metatheory in automated
reasoning at CPP
2019 in Cascais, Portugal.
 My colleagues Robert Y. Lewis and Johannes Hölzl will be organizing
Lean
Together 2019, a gettogether for mathematically oriented Lean
users.

Contents:
Teaching ⋅
Supervision ⋅
Drafts ⋅
Journal Articles ⋅
Conference Papers ⋅
Workshop Papers ⋅
Workshop Abstracts ⋅
Theses ⋅
Books ⋅
Other Publications ⋅
Formal Proofs ⋅
Software ⋅
Activities ⋅
Videos ⋅
Address
Teaching
During period 2 of 2018–2019, Johannes Hölzl and I will teach Logical Verification
using the Lean proof assistant.
During period 5 of 2016–2017, I taught Logical Verification.
During the 2015 summer term, I taught
Concrete
Semantics with Isabelle/HOL at the Universität des Saarlandes with
Mathias Fleury and Daniel Wand.
During the 2012–13, 2013–14, and 2014–15 winter terms, I was the proud
Master of Competition
for the course
Einführung in die Informatik 2
at the Technische Universität München.
Supervision
Note to students: Please send me an email if you are interested in working under my supervision.
See also the Matryoshka project page.
Current:
 Alexander Bentkamp (PhD student, higherorder reasoning)
 Daniel El Ouraoui (PhD student, higherorder SMT; main supervisor: Pascal Fontaine)
 Mathias Fleury (PhD, formalization of inference systems; main supervisor: Christoph Weidenbach)
 Niels Galjaard (BSc student, recursive neural networks for a connection prover)
 HansDieter Hiep (MSc student, generation of verification conditions for protocols; cosupervisor: Farhad Arbab)
 Johannes Hölzl (postdoc, formalization of mathematics and proof automation)
 Pablo Le Hénaff (MSc intern, Lean formalization and tools; cosupervisors: Johannes Hölzl and Robert Y. Lewis)
 Robert Y. Lewis (postdoc, formalization of mathematics and proof automation)
 Roy Overbeek (MSc student, verification of concurrent revisions; main supervisor: Wan Fokkink)
 HansJörg Schurr (PhD student, higherorder SMT; main supervisor: Pascal Fontaine)
 Petar Vukmirović (PhD student, implementation of λfree higherorder superposition)
Past:
 Heiko Becker (graduate research immersion lab, higherorder automatic proving)
 Alexander Bentkamp (MSc, formalization of tensors and deep learning; main supervisor: Dietrich Klakow)
 Aymeric Bouzy (MSc intern, implementation of corecursion upto; cosupervisor: Dmitriy Traytel)
 Simon Cruanes (postdoctoral software engineer, Nunchaku)
 Martin Desharnais (BEng intern, properties of (co)datatypes; cosupervisor: Dmitriy Traytel)
 Michaël Noël Divo (MSc, formalization of λcalculi)
 Daniel El Ouraoui (MSc intern, towards higherorder SMT; main supervisor: Pascal Fontaine)
 Mathias Fleury (MSc intern, integration of provers in Sledgehammer and formalization of ground inference systems; cosupervisor: Dmitriy Traytel)
 Charles Francis (Google Summer of Code, proof redirection)
 Yuan Gao (BSc research assistant, genetic algorithms for time slicing)
 Maximilian Haslbeck (MSc directed research, translation of Naproche to Isabelle; main supervisor: Tobias Nipkow)
 Philipp Hermann (graduate research immersion lab, formalization of tableaux)
 Fabian Kunze (graduate research immersion lab, towards Sledgehammer for Coq)
 Matthieu Lequesne (MSc internship, TLA^{+} frontend for Nunchaku; cosupervisor: Simon Cruanes)
 Lorenz Panny (BSc, (co)recursive function definitions; cosupervisor: Dmitriy Traytel)
 Anders Schlichtkrull (PhD student, formalization of logical calculi; main supervisor: Jørgen Villadsen)
 Anders Schlichtkrull (MSc, formalization of resolution; main supervisor: Jørgen Villadsen)
 Steffen Juilf Smolka (BSc, structured Isabelle proofs from refutation proofs)
 Albert Steckermeier (BSc, enhanced integration of Waldmeister in Sledgehammer)
 Dmytro Traytel (MSc, (co)datatype definitions; main supervisor: Andrei Popescu)
 Petar Vukmirović (MSc student, implementation of λfree higherorder superposition; cosupervisor: Stephan Schulz)
 Jens Wagemaker (BSc student, formalization of mathematics in Lean; cosupervisors: Johannes Hölzl and Sander Dahmen)
 Daniel Wand (PhD, extensions of superposition; main supervisor: Christoph Weidenbach)
Drafts

A verified prover based on ordered resolution
Anders Schlichtkrull, J. C. B., and Dmitriy Traytel.
Draft paper (PDF)

Bindings are functors
J. C. B., Lorenzo Gheri, Andrei Popescu, and Dmitriy Traytel.
Draft paper (PDF)

Scalable finegrained proofs for formula processing
Haniel Barbosa, J. C. B., and Pascal Fontaine.
Draft article (PDF)
Journal Articles

A formal proof of the expressiveness of deep learning
Alexander Bentkamp, J. C. B., and Dietrich Klakow. Accepted in Journal of Automated Reasoning.
Free PDF ⋅ Web site ⋅ Preprint (PDF)

A verified SAT solver framework with learn, forget, restart, and incrementality
J. C. B., Mathias Fleury, Peter Lammich, and Christoph Weidenbach. Journal of Automated Reasoning 61(1–4), pp. 333–365, 2018.
Free PDF ⋅ Web page ⋅ Postprint (PDF)

Introduction to Milestones in Interactive Theorem Proving
Jeremy Avigad, J. C. B., Gerwin Klein, Lawrence Paulson, Andrei Popescu, and Gregor Snelting. Journal of Automated Reasoning 61(1–4), pp. 1–8, 2018.
Web page ⋅ Postprint (PDF)

A decision procedure for (co)datatypes in SMT solvers
Andrew Reynolds and J. C. B. Journal of Automated Reasoning
58(3), pp. 341–362, 2017.
Free PDF ⋅ Web page ⋅ Postprint (PDF)

Soundness and completeness proofs by coinductive methods
J. C. B., Andrei Popescu, and Dmitriy Traytel. Journal of Automated Reasoning
58(1), pp. 149–179, 2017.
Free PDF ⋅ Web page ⋅ Postprint (PDF)

Encoding monomorphic and polymorphic types
J. C. B., Sascha Böhme, Andrei Popescu, and Nicholas Smallbone.
Logical Methods in Computer Science 12(4:13), 2016, pp. 1–52.
Postprint (PDF)

A learningbased fact selector for Isabelle/HOL
J. C. B., David Greenaway, Cezary Kaliszyk, Daniel Kühlwein, and Josef Urban.
Journal of Automated Reasoning 57(3), pp. 219–244, 2016.
Free PDF ⋅ Web page ⋅ Postprint (PDF)

Semiintelligible Isar proofs from machinegenerated proofs
J. C. B., Sascha Böhme, Mathias Fleury, Steffen Juilf Smolka, and Albert Steckermeier.
Journal of Automated Reasoning 56(2), pp. 155–200, 2016.
Web page ⋅ Postprint (PDF)

Hammering towards QED
J. C. B., Cezary Kaliszyk, Lawrence C. Paulson, and Josef Urban.
Journal of Formalized Reasoning 9(1), pp. 101–148, 2016.
Web page ⋅ Postprint (PDF)

Extending Sledgehammer with SMT solvers
J. C. B., Sascha Böhme, and Lawrence C. Paulson.
Journal of Automated Reasoning 51(1), pp. 109–128, 2013.
Web page
⋅
Postprint (PDF)

LEOII and Satallax on the Sledgehammer test bench
Nik Sultana, J. C. B., and Lawrence C. Paulson.
Journal of Applied Logic 11(1), pp. 91–102, 2013.
Web page
⋅
Postprint (PDF)
 Relational analysis of (co)inductive predicates, (co)inductive datatypes, and (co)recursive functions
J. C. B. Software Quality Journal 21(1), pp. 101–126, 2013.
Web page
⋅
Postprint (PDF)
 Monotonicity inference for higherorder formulas
J. C. B. and Alexander Krauss. Journal of Automated Reasoning 47(4), pp. 369–398, 2011.
Web page
⋅
Postprint (PDF)
 Proof pearl: Mechanizing the textbook proof of
Huffman's algorithm in Isabelle/HOL
J. C. B. Journal of Automated Reasoning 43(1), pp. 1–18, 2009.
Web page
⋅
Postprint (PDF)
Conference Papers

Superposition with datatypes and codatatypes
J. C. B., Nicolas Peltier, and Simon Robillard.
In Galmiche, D., Schulz, S., Sebastiani, R. (eds.) 9th International Joint Conference on Automated Reasoning (IJCAR 2018),
LNCS 10900, pp. 370–387, Springer, 2018.
Web page
⋅ Postprint (PDF) ⋅ Report (PDF)

Superposition for lambdafree higherorder logic
Alexander Bentkamp, J. C. B., Simon Cruanes, and Uwe Waldmann.
In Galmiche, D., Schulz, S., Sebastiani, R. (eds.) 9th International Joint Conference on Automated Reasoning (IJCAR 2018),
LNCS 10900, pp. 28–46, Springer, 2018.
Web page
⋅ Postprint (PDF) ⋅ Report (PDF)

Formalizing Bachmair and Ganzinger's ordered resolution prover
Anders Schlichtkrull, J. C. B., Dmitriy Traytel, and Uwe Waldmann.
In Galmiche, D., Schulz, S., Sebastiani, R. (eds.) 9th International Joint Conference on Automated Reasoning (IJCAR 2018),
LNCS 10900, pp. 89–107, Springer, 2018.
Web page
⋅ Postprint (PDF) ⋅ Report (PDF)

A verified SAT solver with watched literals using Imperative HOL
Mathias Fleury, J. C. B., and Peter Lammich. In Andronick, J., Felty, A. P. (eds.) 7th ACM SIGPLAN International Conference on Certified Programs and Proofs (CPP 2018), pp. 158–171, ACM, 2018.
Postprint (PDF)

Nested multisets, hereditary multisets, and syntactic ordinals in Isabelle/HOL
J. C. B., Mathias Fleury, and Dmitriy Traytel.
In Miller, D. (ed.) 2nd International Conference on Formal Structures for Computation and Deduction (FSCD 2017),
LIPIcs 84, pages 11:1–11:18, Schloss Dagstuhl—LeibnizZentrum für Informatik, 2017.
Postprint (PDF)

A formal proof of the expressiveness of deep learning
Alexander Bentkamp, J. C. B., and Dietrich Klakow.
In AyalaRincón, M., Muños, C. A. (eds.) 8th Conference on Interactive Theorem Proving (ITP 2017),
LNCS 10499, pp. 46–64, Springer, 2017.
Web page ⋅ Postprint (PDF)

A verified SAT solver framework with learn, forget, restart, and incrementality
J. C. B., Mathias Fleury, and Christoph Weidenbach.
In Sierra, C. (ed.) 26th International Joint Conference on Artificial Intelligence (IJCAI17), pp. 4786–4790, ijcai.org, 2017.
Web ⋅ Postprint (PDF)

Foundational (co)datatypes and (co)recursion for higherorder logic
Julian Biendarra, J. C. B., Aymeric Bouzy, Martin
Desharnais, Mathias Fleury, Johannes Hölzl, Ondřej Kunčar, Andreas
Lochbihler, Fabian Meier, Lorenz Panny, Andrei Popescu, Christian Sternagel,
René Thiemann, and Dmitriy Traytel.
In Dixon, C., Finger, M. (eds.)
11th International Symposium on Frontiers of Combining Systems (FroCoS 2017),
LNCS 10483, pp. 3–21, Springer, 2017.
Web page
⋅
Postprint (PDF)

A transfinite Knuth–Bendix order for lambdafree higherorder terms
Heiko Becker, J. C. B., Uwe Waldmann, and Daniel Wand.
In de Moura, L. (ed.) 26th International Conference on Automated Deduction (CADE26), LNCS 10395, pp. 432–453, Springer, 2017.
Web ⋅ Postprint (PDF) ⋅ Report (PDF)

Scalable finegrained proofs for formula processing
Haniel Barbosa, J. C. B., and Pascal Fontaine.
In de Moura, L. (ed.) 26th International Conference on Automated Deduction (CADE26), LNCS 10395, pp. 398–412, Springer, 2017.
Web ⋅ Postprint (PDF) ⋅ Report (PDF)

Foundational nonuniform (co)datatypes for higherorder logic
J. C. B., Fabian Meier, Andrei Popescu, and Dmitriy Traytel.
32nd Annual IEEE Symposium on Logic in Computer Science (LICS 2017), pp. 1–12, IEEE Computer Society, 2017.
Web ⋅ Postprint (PDF) ⋅ Report (PDF)

A lambdafree higherorder recursive path order
J. C. B., Uwe Waldmann, and Daniel Wand.
In Esparza, J., Murawski, A. S. (eds.) 20th International Conference on Foundations of Software Science and Computation Structures (FoSSaCS 2017), LNCS 10203, pp. 461–479, Springer, 2017.
Web ⋅ Postprint (PDF) ⋅ Report (PDF)

Friends with benefits: Implementing corecursion in foundational proof assistants
J. C. B., Aymeric Bouzy, Andreas Lochbihler, Andrei Popescu, and Dmitriy Traytel.
In Yang, H. (ed.) 26th European Symposium on Programming (ESOP 2017), LNCS 10201, pp. 111–140, Springer, 2017.
Web ⋅ Postprint (PDF) ⋅ Report (PDF)

A decision procedure for (co)datatypes in SMT solvers
Andrew Reynolds and J. C. B.
In Kambhampati, S. (ed.) 25th International Joint Conference on Artificial Intelligence (IJCAI16), pp. 4205–4209, IJCAI/AAAI Press, 2016.
Web ⋅ Postprint (PDF)

A verified SAT solver framework with learn, forget, restart, and incrementality
J. C. B., Mathias Fleury, and Christoph Weidenbach. In Olivetti, N., Tiwari, A. (eds.) 8th International Joint Conference on Automated Reasoning (IJCAR 2016),
LNCS 9706, pp. 25–44, Springer, 2016.
Postprint (PDF)

Model finding for recursive functions in SMT
Andrew Reynolds, J. C. B., Simon Cruanes, and Cesare Tinelli. In Olivetti, N., Tiwari, A. (eds.) 8th International Joint Conference on Automated Reasoning (IJCAR 2016),
LNCS 9706, pp. 133–151, Springer, 2016.
Postprint (PDF)

Foundational extensible corecursion—A proof assistant perspective
J. C. B., Andrei Popescu, and Dmitriy Traytel. In Fisher, K., Reppy, J. H. (eds.) 20th ACM SIGPLAN International Conference on Functional Programming (ICFP 2015),
pp. 192–204, ACM, 2015.
Postprint (PDF)

A decision procedure for (co)datatypes in SMT solvers
Andrew Reynolds and J. C. B. In Felty, A., Middeldorp, A. (eds.) 25th International Conference on Automated Deduction (CADE25),
LNCS 9195, pp. 197–213, Springer, 2015.
Postprint (PDF)
⋅
Report (PDF)

Mining the Archive of Formal Proofs
J. C. B., Maximilian Haslbeck, Daniel Matichuk, and Tobias Nipkow. In Kerber, M. (ed.) International Conference on Intelligent Computer Mathematics (CICM 2015),
LNCS 9150, pp. 1–15, Springer, 2015.
Postprint (PDF)

Witnessing (co)datatypes
J. C. B., Andrei Popescu, and Dmitriy Traytel. In Vitek, J. (ed.)
European Symposium on Programming (ESOP 2015),
LNCS 9032, pp. 359–382, Springer, 2015.
Postprint (PDF)

Experience report: The next 1100 Haskell programmers
J. C. B., Lars Hupel, Tobias Nipkow, Lars Noschinski, and Dmitriy Traytel.
In Jeuring, J., Chakravarty, M. M. T. (eds.) ACM SIGPLAN Haskell Symposium 2014 (Haskell 2014), pp. 25–30, ACM, 2014.
Web page
⋅
Postprint (PDF)

Truly modular (co)datatypes for Isabelle/HOL
J. C. B., Johannes Hölzl, Andreas Lochbihler, Lorenz Panny, Andrei Popescu, and Dmitriy Traytel. In Klein, G., Gamboa, R. (eds.)
5th Conference on Interactive Theorem Proving (ITP 2014),
LNCS 8558, pp. 93–110, Springer, 2014.
Web page
⋅
Postprint (PDF)

Cardinals in Isabelle/HOL
J. C. B., Andrei Popescu, and Dmitriy Traytel. In Klein, G., Gamboa, R. (eds.)
5th Conference on Interactive Theorem Proving (ITP 2014),
LNCS 8558, pp. 111–127, Springer, 2014.
Web page
⋅
Postprint (PDF)

Unified classical logic completeness: A coinductive pearl
J. C. B., Andrei Popescu, and Dmitriy Traytel. In
Demri, S., Kapur, D., Weidenbach, C. (eds)
7th International Joint Conference on Automated Reasoning (IJCAR 2014),
LNCS 8562, pp. 46–60, Springer, 2014.
Web page
⋅
Postprint (PDF)

Mechanizing the metatheory of Sledgehammer
J. C. B. and Andrei Popescu. In Fontaine, P., Ringeissen, C., Schmidt, R. A. (eds.)
9th International Symposium on Frontiers of Combining Systems (FroCoS 2013),
LNCS 8152, pp. 245–260, Springer, 2013.
Web page
⋅
Postprint (PDF)

MaSh: Machine learning for Sledgehammer
Daniel Kühlwein, J. C. B., Cezary Kaliszyk, and Josef Urban.
In Blazy, S., PaulinMohring, C., Pichardie, D. (eds.)
4th Conference on Interactive Theorem Proving (ITP 2013),
LNCS 7998, pp. 35–50, Springer, 2013.
Web page
⋅
Postprint (PDF)

TFF1: The TPTP typed firstorder form with rank1 polymorphism (system description)
J. C. B. and Andrei Paskevich. In Bonacina, M. P. (ed.) 24th International Conference on Automated Deduction (CADE24),
LNCS 7898, pp. 414–420, Springer, 2013.
Web page
⋅
Postprint (PDF) ⋅ Specification (PDF)

Encoding monomorphic and polymorphic types
J. C. B., Sascha Böhme, Andrei Popescu, and Nicholas Smallbone.
In Piterman, N., Smolka, S. (eds.) 19th International Conference on Tools and Algorithms for the
Construction and Analysis of Systems (TACAS 2013), LNCS 7795, pp. 493–507, Springer, 2013.
Web page
⋅ Postprint (PDF)

Foundational, compositional (co)datatypes for higherorder logic—Category theory applied to theorem proving
Dmitriy Traytel, Andrei Popescu, and J. C. B. In
27th Annual IEEE Symposium on Logic in Computer Science (LICS 2012),
pp. 596–605, IEEE Computer Society, 2012.
Web page
⋅
Postprint (PDF)

More SPASS with Isabelle—Superposition with hard sorts and configurable simplification
J. C. B., Andrei Popescu, Daniel Wand, and Christoph Weidenbach. In Beringer, L., Felty, A. P. (eds.) Third International Conference on Interactive Theorem Proving (ITP 2012),
LNCS 7406, pp. 345–360, Springer, 2012.
Web page
⋅
Postprint (PDF)

Automatic proof and disproof in Isabelle/HOL
J. C. B., Lukas Bulwahn, and Tobias Nipkow. In Tinelli, C., SofronieStokkermans, V. (eds.) 8th International Symposium
Frontiers of Combining Systems (FroCoS 2011),
LNCS 6989, pp. 12–27, Springer, 2011.
Web page
⋅
Postprint (PDF)

Extending Sledgehammer with SMT solvers
J. C. B., Sascha Böhme, and Lawrence C. Paulson.
In Bjørner, N., SofronieStokkermans, V. (eds.) 23rd International Conference on Automated Deduction (CADE23),
LNCS 6803, pp. 116–130, Springer, 2011.
Web page
⋅
Postprint (PDF)

Nitpicking C++ concurrency
J. C. B., Tjark Weber, Mark Batty, Scott Owens, and Susmit Sarkar.
13th International ACM SIGPLAN Symposium on
Principles and Practice of Declarative Programming (PPDP 2011),
pp. 113–124, ACM, 2011.
Web page
⋅ Postprint (PDF)

Generating counterexamples for structural inductions by exploiting nonstandard models
J. C. B. and Koen Claessen.
In Fermüller, C. G., Voronkov, A. (eds.) 17th International Conference on
Logic for Programming, Artificial Intelligence and Reasoning (LPAR Yogyakarta 2010),
LNCS 6397, pp. 117–141, Springer, 2010.
Web page
⋅
Postprint (PDF)
 Nitpick: A counterexample generator for Isabelle/HOL based on the relational
model finder Kodkod (system description)
J. C. B. Presented at the 17th International
Conference on Logic for Programming, Artificial Intelligence and Reasoning (LPAR
Yogyakarta 2010).
Web page
⋅ Postprint (PDF)

Monotonicity inference for higherorder formulas
J. C. B. and Alexander Krauss.
In Giesl, J., Hähnle, R. (eds.) 5th International Joint Conference on Automated Reasoning (IJCAR 2010),
LNCS 6173, pp. 91–106, Springer, 2010.
Web page ⋅
Postprint (PDF)

Nitpick: A counterexample generator for higherorder logic based on a
relational model finder
J. C. B. and Tobias Nipkow.
In Kaufmann, M., Paulson, L. C. (eds.)
First International Conference on Interactive Theorem Proving (ITP 2010), LNCS 6172, pp. 131–146, Springer, 2010.
Web page ⋅
Postprint (PDF)

Relational analysis of (co)inductive predicates, (co)inductive datatypes, and (co)recursive functions
J. C. B.
In Fraser, G., Gargantini, A. (eds.) Fourth International Conference on Tests and Proofs (TAP 2010), LNCS 6143, pp. 117–134, Springer, 2010.
Web page ⋅
Postprint (PDF)

Nitpick: A counterexample generator for higherorder logic based on a
relational model finder (extended abstract)
J. C. B. and Tobias Nipkow. Third International
Conference on Tests and Proofs (TAP 2009). In Dubois, C. (ed.) TAP 2009:
Short Papers, ETH Technical Report 630, 2009.
Full proceedings (PDF) ⋅
Postprint (PDF)
Workshop Papers

Language and proofs for higherorder SMT (work in progress)
Haniel Barbosa, J. C. B., Simon Cruanes, Daniel El Ouraoui, and Pascal Fontaine.
In Dubois, C., Woltzenlogel Paleo, B. (eds.) 5th Workshop on Proof eXchange for Theorem Proving (PxTP 2017), pp. 15–22, EPTCS 262, 2017.
Web page ⋅ Postprint (PDF)

Extending Nunchaku to dependent type theory
Simon Cruanes and J. C. B. Hammers for Type Theories (HaTT 2016)
Postprint (PDF)

Model finding for recursive functions in SMT
Andrew Reynolds, J. C. B., and Cesare Tinelli. In Ganesh, V., Jovanović, D. (eds.) Satisfiability Modulo Theories Workshop (SMT 2015).
Postprint (PDF) ⋅
Report (PDF)

Primitively (co)recursive definitions for Isabelle/HOL
Lorenz Panny, J. C. B., and Dmitriy Traytel. Isabelle Workshop 2014.
Postprint (PDF)

My life with an automatic theorem prover
J. C. B. In Kovács, L., Voronkov, A. (eds.) First and Second Vampire Workshops (Vampire 2014 and 2015), pp. 1–7, EPiC 38, EasyChair, 2016.
Postprint (PDF)

A survey of axiom selection as a machine learning problem
J. C. B. and Daniel Kühlwein. In Geschke, S., Loewe, B., Schlicht, P. (eds.) Infinity, Computability, and Metamathematics: Festschrift Celebrating the 60th Birthdays of Peter Koepke and Philip Welch, Tributes, College Publications, 2014.
Postprint (PDF)

Robust, semiintelligible Isabelle proofs from ATP proofs
Steffen Juilf Smolka and J. C. B. In Blanchette, J. C., Urban, J. (eds.) Third International Workshop on
Proof Exchange for Theorem Proving (PxTP 2013), pp. 117–132, EPiC 14, EasyChair, 2013.
Postprint (PDF)

Redirecting proofs by contradiction
J. C. B. In Blanchette, J. C., Urban, J. (eds.) Third International Workshop on
Proof Exchange for Theorem Proving (PxTP 2013), pp. 11–26, EPiC 14, EasyChair, 2013.
Postprint (PDF)
 Three years of experience with Sledgehammer, a practical link between automated and
interactive theorem provers
Lawrence C. Paulson and J. C. B. 8th International Workshop on the Implementation of Logics (IWIL2010).
Full proceedings (PDF) ⋅
Postprint (PDF)

Intraobject versus interobject: Concurrency and reasoning in Creol
Einar Broch Johnsen, J. C. B., Marcel Kyas, and Olaf Owe.
Electronic Notes in Theoretical Computer
Science 243 (2nd International Workshop on Harnessing Theories for Tool Support in Software,
TTSS 2008), pp. 89–103, 2009.
Web page ⋅
Postprint (PDF)
 An open system operational
semantics for an objectoriented and componentbased language
J. C. B. and Olaf Owe. Electronic
Notes in Theoretical Computer Science 215 (4th
International Workshop on Formal Aspects of Component Software, FACS 2007), pp.
151–169, 2008.
Web page ⋅
Postprint (PDF)
Workshop Abstracts

A verified SAT solver with watched literals using Imperative HOL (extended abstract)
Mathias Fleury, J. C. B., and Peter Lammich. Isabelle Workshop 2018.
Abstract (PDF)

Towards strong higherorder automation for fast interactive verification
J. C. B., Pascal Fontaine, Stephan Schulz, and Uwe Waldmann.
In Reger, G., Traytel, D. (eds.) 1st International Workshop on Automated Reasoning: Challenges, Applications, Directions, Exemplary Achievements (ARCADE 2017), pp. 16–23, EPiC 51, EasyChair, 2017.
Web page ⋅ Postprint (PDF)

An Isabelle formalization of the expressiveness of deep learning (extended abstract)
Alexander Bentkamp, J. C. B., and Dietrich Klakow. In Hales, T. C., Kaliszyk, C., Schulz, S., Urban, J. (eds.) 2nd Conference on Artificial Intelligence and Theorem Proving (AITP 2017), pp. 22–23.
Abstract (PDF)

Friends with benefits: Implementing foundational corecursion in Isabelle/HOL (extended abstract)
J. C. B., Aymeric Bouzy, Andreas Lochbihler, Andrei Popescu, and Dmitriy Traytel. Isabelle Workshop 2016.
Abstract (PDF)

A verified SAT solver framework with learn, forget, restart, and incrementality (extended abstract)
J. C. B., Mathias Fleury, and Christoph Weidenbach. Isabelle Workshop 2016.
Abstract (PDF)

Model finding for recursive functions in SMT
Andrew Reynolds, J. C. B., and Cesare Tinelli. QUANTIFY 2015.
Abstract (PDF)

Toward Nitpick and Sledgehammer for Coq
J. C. B. Coq Workshop 2015.
Abstract (PDF)

Isabelle and security
J. C. B. and Andrei Popescu. Grande Region Security and Reliability Day 2015, presented
at poster session.
Abstract (PDF)
Theses
 Automatic Proofs and Refutations for HigherOrder Logic
J. C. B. PhD thesis, Fakultät für Informatik,
Technische Universität München, June 2012.
PDF
 Verification of Assertions in Creol Programs
J. C. B. MSc thesis, Institutt for informatikk, Universitetet i Oslo, May 2008.
PDF
Books

Seventh International Conference on Interactive Theorem Proving (ITP 2016)
J. C. B. and Stephan Merz (eds.)
LNCS 9807, Springer, 2016.
Web page

First International Workshop on Hammers for Type Theories (HaTT 2016)
J. C. B. and Cezary Kaliszyk (eds.)
EPTCS 210, 2016.
Web page
⋅ PDF

Ninth International Conference on Tests and Proofs (TAP 2015)
J. C. B. and Nikolai Kosmatov (eds.)
LNCS 9154, Springer, 2015.
Web page

Third International Workshop on Proof Exchange for Theorem Proving (PxTP 2013)
J. C. B. and Josef Urban (eds.)
EPiC 14, EasyChair, 2013.
Web page
⋅ PDF
 C++ GUI Programming with Qt 4
(Second Edition)
J. B. and Mark Summerfield. Prentice Hall Open Source Software Development Series,
Prentice Hall, February 2008.
Chinese (Simplified), German, Korean, and Russian translations are available.
Web page
 C++ GUI Programming with Qt 4
J. B. and Mark Summerfield. Prentice Hall, July 2006.
Chinese (Simplified), French, German, Japanese, and Russian
translations are available.
Web page ⋅
PDF
 C++ GUI Programming with Qt 3
J. B. and Mark Summerfield. Bruce
Perens' Open Source Series, Prentice Hall, January 2004.
Chinese (Simplified), German, Japanese, and Russian translations are available.
Web page ⋅
PDF
Other Publications

Monotonicity or how to encode polymorphic types safely and efficiently
J. C. B., Sascha Böhme, and Nicholas Smallbone. Subsumed by “Encoding monomorphic and polymorphic types.”
Technical report (PDF)
 The Little Manual of API Design
J. B. Trolltech, a Nokia company, June 2008.
PDF
 Overview of the Creol language
J. C. B. Essay, Department of Informatics, Univerity of Oslo, May 2007.
PDF
 Throwing MFC out of Windows—Qt application
development with Visual Studio .NET
J. B. Linux Magazine 73, pp. 40–43, December 2006.
Web page
 WindowstoLinux migration with Qt
J. B. TUX 4, July 2005.
Web page
Formal Proofs

Operations on bounded natural functors
J. C. B., Andrei Popescu, and Dmitriy Traytel. Archive of Formal Proofs, 2018.
Web page

Formalization of Bachmair and Ganzinger's ordered resolution prover
Anders Schlichtkrull, J. C. B., Dmitriy Traytel, and Uwe Waldmann. Archive of Formal Proofs, 2018.
Web page

Abstract soundness
J. C. B., Andrei Popescu, and Dmitriy Traytel. Archive of Formal Proofs, 2017.
Web page

Formalization of Knuth–Bendix orders for lambdafree higherorder terms
Heiko Becker, J. C. B., Uwe Waldmann, and Daniel Wand. Archive of Formal Proofs, 2016.
Web page

Formalization of nested multisets, hereditary multisets, and syntactic ordinals
J. C. B., Mathias Fleury, and Dmitriy Traytel. Archive of Formal Proofs, 2016.
Web page

Formalization of recursive path orders for lambdafree higherorder terms
J. C. B., Uwe Waldmann, and Daniel Wand. Archive of Formal Proofs, 2016.
Web page

Abstract completeness
J. C. B., Andrei Popescu, and Dmitriy Traytel. Archive of Formal Proofs, 2014.
Web page

Sound and complete sort encodings for firstorder logic
J. C. B. and Andrei Popescu. Archive of Formal Proofs, 2013.
Web page

The textbook proof of Huffman's algorithm
J. C. B. Archive of Formal Proofs, 2008.
Web page
Software

Nunchaku—A standalone higherorder model finder.
Repository

Isabelle's (co)datatype package—Commands for defining (co)datatypes and primitively (co)recursive functions.
User's manual (PDF)

Sledgehammer—Let automatic theorem provers write your Isabelle/HOL proof scripts.
User's manual (PDF)
Activities
 Steering committee member: CADE trustee (2016–), ITP (2016–), TAP (2015–).
 AAR newsletter editor and board member (2015–2017).
 Conference program committee member:
CADE27,
NFM 2018,
CAV 2018,
TAP 2018,
IJCAR 2018,
ITP 2018,
CPP 2018,
CAV 2017,
CADE26,
TAP 2017,
ITP 2016 (cochair),
TAP 2016,
TAP 2015 (cochair),
CADE25,
IJCAR 2014,
FroCoS 2013.
 Conference organization:
ITP 2016 (coorganizer),
CADE25 (cochair of workshops, tutorials, and competitions).
 Workshop program committee member:
AITP 2019,
IWIL2018,
Deduktionstreffen 2018,
VDMW 2018,
AITP 2018,
SMT 2017,
PxTP 2017,
IWIL2017,
ARCADE 2017,
AITP 2017,
Deduktionstreffen 2016,
SMT 2016,
HaTT 2016 (cochair),
QBF 2016,
IWIL2015,
LSFA 2015,
QUANTIFY 2015,
Deduktionstreffen 2015,
PxTP 2015,
PAAR2014,
PxTP 2013 (cochair),
PxTP 2012,
IWIL2012,
PAAR2012, and
IWIL2010.
Videos
 Inria Inside—Jasmin Blanchette, 2016.
YouTube
 Qt 4 Dance, 2005. JeanClaude, c'est moi.
YouTube
Address
dr. J.C. Blanchette
W&N Building, Room T437
Vrije Universiteit Amsterdam
Department of Computer Science
Section of Theoretical Computer Science
De Boelelaan 1081a
1081 HV Amsterdam
The NetherlandsPhone: +31 20 598 9886
Email: j.c.blanchette vu.nl
“A proof is a proof.
What kind of a proof?
It's a proof.
A proof is a proof,
and when you have a good proof,
it's because it's proven.”
— Jean Chrétien

