| Date: | Thursday, 5th February 2026 |
| Speaker: | Dr Anna Duwenig (University of New South Wales, Australia) |
| Title: | The Zappa–Szép product of groupoid twists |
| Abstract: | The Zappa–Szép (ZS) product of two groupoids is a generalisation of the semi-direct product: instead of encoding one groupoid action by homomorphisms, the ZS product groupoid encodes two (non-homomorphic, but "compatible") actions of the groupoids on each other. Together with my collaborator Boyu Li, I have been working on various ways of generalising this construction to the world of C*-algebras. In this talk, I will introduce you to our generalisation of the ZS product to two twists over groupoids and, if time permits, I will show how our construction ties in with Weyl twists from Cartan pairs arising from Kumjian–Renault theory. (Based on joint work with Boyu Li, New Mexico State University.) |
| — [No seminar on 12th February 2026.] — | |
| Date: | Thursday, 19th February 2026 |
| Speaker: | TBA |
| Title: | TBA |
| Abstract: | TBA |
| Date: | Thursday, 26th February 2026 |
| Speaker: | TBA |
| Title: | TBA |
| Abstract: | TBA |
| — [No seminar on 5th or 12th March 2026 due to MATRIX Workshop.] — | |
| Date: | Thursday, 19th March 2026 |
| Speaker: | TBA |
| Title: | TBA |
| Abstract: | TBA |
| Date: | Thursday, 26th March 2026 |
| Speaker: | Dr Samuel Evington (University of Münster, Germany) |
| Title: | Principal groupoid models for Cuntz algebras |
| Abstract: | TBA |
| Date: | Thursday, 2nd April 2026 |
| Speaker: | TBA |
| Title: | TBA |
| Abstract: | TBA |
| — [No seminar on 9th or 16th April 2026 due to Mid-Trimester Break.] — | |
| Date: | Thursday, 23rd April 2026 |
| Speaker: | TBA |
| Title: | TBA |
| Abstract: | TBA |
| Date: | Thursday, 30th April 2026 |
| Speaker: | TBA |
| Title: | TBA |
| Abstract: | TBA |
| Date: | Thursday, 7th May 2026 |
| Speaker: | TBA |
| Title: | TBA |
| Abstract: | TBA |
| Date: | Thursday, 14th May 2026 |
| Speaker: | TBA |
| Title: | TBA |
| Abstract: | TBA |
| Date: | Thursday, 21st May 2026 |
| Speaker: | TBA |
| Title: | TBA |
| Abstract: | TBA |
| Date: | Thursday, 28th May 2026 |
| Speaker: | TBA |
| Title: | TBA |
| Abstract: | TBA |