Liat Peterfreund

ליאת פטרפרוינד

I am a Senior Lecturer (Assistant Professor) at the School of Computer Science & Engineering at the Hebrew University of Jerusalem. My research focuses on the foundations of data management, with particular interest in graph query languages, their formal semantics, and new approaches to handling incomplete information. I am especially interested in studying real-life data problems through the lens of precise and elegant mathematical models.

In addition to my academic role, I work as a part-time consultant at RelationalAI, where I apply foundational research to real-world systems.

Before joining HUJI, I was a CNRS researcher (chargée de recherche) at LIGM, Université Paris-Est, following postdoctoral positions at the University of Edinburgh, IRIF (Université Paris Cité), and École Normale Supérieure Paris. I completed my Ph.D. at the Computer Science Department, Technion.

You can find my full list of publications on DBLP and Google Scholar.

Contact Information

Dr. Liat Peterfreund
Senior Lecturer (Assistant Professor)
School of Computer Science and Engineering
The Hebrew University of Jerusalem

Office: Rothberg B-430
Rothberg Family Buildings
The Edmond J. Safra Campus
Jerusalem 9190401, Israel

📧 liat.peterfreund at mail.huji.ac.il

Available Positions

📢 I am looking for highly motivated postdoctoral researchers and graduate students to join my group.

If you are interested in working on foundational data management problems, please contact me.

News

Keynote Talk: From Standardization to Theory and Back: A Formal Look at the GQL Standard. Invited keynote at Highlights of Logic, Games and Automata 2025
📄 New Paper: GQL and SQL/PGQ: Theoretical Models and Expressive Power with A.Gheerbrant, L.Libkin, Alexandra Rogova. Recently appeared in VLDB 2025
📄 New Paper: Querying Graph Data: Where We Are and Where To Go with L.Libkin, W.Martens, F.Murlak, D.Vrgoč

Invited paper Gems of PODS. Recently appeared in PODS 2025

📄New Paper: Towards Cross-Model Efficiency in SQL/PGQ with H.Rotschield. Recently appeared in Grades-NDA @ SIGMOD 2025
📄 New Paper: Rel: A Programming Language for Relational Data with M.Aref, P.Guagliardo, G.Kastrinis, L.Libkin, V.Marsault, W.Martens, M.McGrath, F.Murlak, N.Nystrom, A.Rogers, C.Sirangelo, D.Vrgoc, D.Zhao, A.Zreika. Recently appeared in SIGMOD Industry, 2025
📄 New Paper: Queries with External Predicates with P.Guagliardo, L.Libkin, V.Marsault, W.Martens, F.Murlak, C.Sirangelo. Recently appeared in ICDT 2025
📄 New Paper: Database Theory in Action: Cypher, GQL, and Regular Path Queries with A.Gheerbrant, L.Libkin, A.Rogova. Recently appeared in ICDT 2025

Active Grants

Israel Science Foundation (ISF) Grant No. 2355/24 – Foundations of Graph Query Languages
ISF Grant No. 2417/24 – Laboratory Equipment for the Foundations of Data Management
Hebrew University CSE Starting Grant

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