Jui-Hsuan Wu (Ray) 吳睿軒

profile.jpg

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.
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

  1. FSCD 2026
    Non-Wellfounded Derivations for Intersection Subtyping with Fixpoints
    Olivier Laurent, and Jui-Hsuan Wu
    2026
  2. APLAS 2025
    Positive Sharing and Abstract Machines
    Beniamino Accattoli, Claudio Sacerdoti Coen, and Jui-Hsuan Wu
    2025
  3. PhD thesis
    Proof theory, syntactic representations, logic, and sharing
    Jui-Hsuan Wu
    2024
  4. MFPS 2024
    Positive Focusing is Directly Useful
    Beniamino Accattoli, and Jui-Hsuan Wu
    In 40th International Conference on Mathematical Foundations of Programming Semantics (MFPS), 2024
  5. APLAS 2023
    Proofs as Terms, Terms as Graphs
    Jui-Hsuan Wu
    In 21st Asian Symposium on Programming Languages and Systems (APLAS), 2023
  6. CSL 2023
    A positive perspective on term representation: Extended paper
    Dale Miller, and Jui-Hsuan Wu
    In 31th EACSL Annual Conference on Computer Science Logic (CSL), 2023
  7. LFMTP 2022
    A positive perspective on term representation: work in progress
    Dale Miller, and Jui-Hsuan Wu
    2022
  8. LICS 2021
    Combinatorial Proofs and Decomposition Theorems for First-order Logic
    Dominic Hughes, Lutz Straßburger, and Jui-Hsuan Wu
    In 36th Annual ACM/IEEE Symposium on Logic in Computer Science (LICS), 2021