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Oya Lab
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The lab studies quantum groups and cluster algebras from the viewpoint of representation theory.

AboutAbout the lab
Exploring the representation theory of Lie algebras and quantum groups.
The Oya Lab studies representation theory in algebra, in particular Kac–Moody Lie algebras, quantum groups, and quantum cluster algebras.
As quantum groups, the lab works with quantum enveloping algebras and quantum coordinate rings.
In past graduation research, students have read books on Lie algebras and quantum groups, as well as books on Young diagrams, number theory, and combinatorial games.
The lab welcomes lab visits from students who wish to join it at the graduate level, and online visits are also possible.
Key terms
- Representation theory
- A field that studies the structure of abstract algebras such as groups and Lie algebras by translating them into matrix computations
- Quantum group
- An algebra obtained by deforming, with a parameter, an algebra that expresses symmetry, such as a Lie algebra
- Cluster algebra
- An algebra built by repeatedly exchanging sets of variables according to fixed rules
NewsLab news
Co-authored paper on quantum configuration spaces of decorated flags posted on arXiv
Co-authored paper on integral cluster structures on quantum coordinate rings posted on arXiv
Co-authored paper on polytopes and cluster structures of Schubert varieties published
Paper on cluster structures on coordinate rings of simple algebraic groups posted on arXiv
ResearchResearch themes
*Illustrative imageCluster Structures on Coordinate Rings of Quantum Groups
Hidden in the algebra known as the coordinate ring of a quantum group is a structure called a cluster algebra, in which generators are replaced step by step. The lab constructs this structure, including its integral version, and explores applications to representation theory.
*Illustrative imageQuantum Configuration Spaces of Flags
The lab quantizes the space of configurations of arranged objects called "decorated flags" and studies its algebraic properties. Using the ideas of cluster algebras, it clarifies what kind of algebra describes this space.
MembersFaculty
The members of the Oya Lab consist of faculty, and doctoral, master's, and undergraduate students.As of 2026
- Associate ProfessorHironori OyaPublications ↗
VoicesStudent voices
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “E8Petrie” Jgmoxness / CC BY-SA 3.0 (cropped)
- Cluster Structures on Coordinate Rings of Quantum Groups: “Polygon mouths and ears” Azylber / CC BY-SA 3.0 (cropped)
- Quantum Configuration Spaces of Flags: “Fano plane projective line symmetries scan” Jackson Walters / CC BY-SA 4.0 (cropped)
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