Jui-Hsuan Wu (Ray) 吳睿軒
Bureau M7 318
46 Allée d'Italie
69364 Lyon Cedex 07
Hi! I am Jui-Hsuan Wu! I’ll soon be joining Grenoble INP - UGA as a Maître de Conférences (assistant professor). I also go by the name Ray.
Before, I was a postdoctoral researcher in the Plume team, LIP, ENS Lyon, funded by the ANR project RECIPROG.
Even before, I was a PhD student at LIX, Ecole Polytechnique & Inria Saclay advised by Dale Miller and Beniamino Accattoli. Before my PhD, I studied computer science and mathematics at Ecole Normale Supérieure and got a master degree from Master Parisien de Recherche en Informatique. You can have a look at my CV (Version française).
I am mainly interested in structural proof theory and its connection with the theory of programming languages. My research interests include focusing & polarization, Curry-Howard correspondence, linear logic, proof search, $\lambda$-calculus and abstract machines.
Recently, in collaboration with Olivier Laurent, I have been working on proof theory for subtyping of intersection types. I am also continuing my work on the positive $\lambda$-calculus, a variant of $\lambda$-calculus with explicit substitutions I introduced during my PhD. See my APLAS 2023 paper, as well as our MFPS 2024 and APLAS 2025 papers, for more details.
Misc
I am from New Taipei, Taiwan.
Find out how my name is pronouced: Jui, 睿 (sounds like ray in English) and Hsuan, 軒.
Take a look at APLL, an automated prover for linear logic designed and implemented by me. If you are new to linear logic, check out the interactive prover C1ick & c⊗LLec⊥ whose automated proving part is based on APLL.
I sometimes play Go when I have time. My EGD profile.
I am a music enthusiast. My favorite artists include Daft Punk, Soft Lipa, Sunset Rollercoaster, Loyle Carner, FKJ, Mac Miller, Parcels, Pomme, and Nujabes.
My brother is an image maker. Check out his work here.
News
| Apr 18, 2026 | Our paper “Non-Wellfounded Derivations for Intersection Subtyping with Fixpoints” (with Olivier Laurent) has been accepted at FSCD 2026. PDF. |
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| Mar 26, 2026 | I gave a talk on our recent work on intersection subtyping at Syntax Meets Semantics @ IRIF, Paris, France. Slides. |
| Feb 05, 2026 | I gave a talk on our recent work on intersection subtyping at the CHoCoLa meeting. Slides. |
| Nov 28, 2025 | Our paper “Positive Sharing and Abstract Machines” (with Beniamino Accattoli and Claudio Sacerdoti Coen) has won the Best Paper Award at APLAS 2025. PDF. |
| Oct 13, 2025 | I gave a talk at GdT Plume @ LIP, ENS de Lyon. Slides. |
| Jan 16, 2025 | I gave a talk at LoCal seminar @ LIPN, Université Sorbonne Paris Nord. Slides. |
Publications and preprints
- FSCD 2026
- APLAS 2025
- PhD thesis
- MFPS 2024Positive Focusing is Directly UsefulIn 40th International Conference on Mathematical Foundations of Programming Semantics (MFPS), 2024
- APLAS 2023Proofs as Terms, Terms as GraphsIn 21st Asian Symposium on Programming Languages and Systems (APLAS), 2023
- CSL 2023A positive perspective on term representation: Extended paperIn 31th EACSL Annual Conference on Computer Science Logic (CSL), 2023
- LFMTP 2022
- LICS 2021Combinatorial Proofs and Decomposition Theorems for First-order LogicIn 36th Annual ACM/IEEE Symposium on Logic in Computer Science (LICS), 2021