Presenter: Dr. Debargha Banerjee, Indian Institute of Science Education and Research

If we start with mod $p$ objects, it may or may not have lifts to characteristic zero objects. Buium introduced differential modular forms in a new geometry by using a close analogy with function field situation. In this new geometry, modular forms modulo $p$ always have lifting to characteristic zero modular forms. In this talk, we will introduce the theory of modular forms and differential modular forms. Differential modular forms are obtained by differentiating modular forms in this new way. In more fancy language, these are the modular forms obtained by applying the arithmetic jet space functors (adjoint to the Witt vector functors) to the ring of modular forms. We show that these differential modular forms help us to detect the ordinary elliptic curves and elliptic curves with Frobenius lifts. The whole process is executed by a new analogue of differentials applied on integers.

About Pure mathematics seminars

We present regular seminars on a range of pure mathematics interests. Students, staff and visitors to UQ are welcome to attend, and to suggest speakers and topics.

Seminars are held on Tuesdays from 3pm to 3.50pm in Room 67-442 of the Priestley Building (Building 67).

Talks comprise 45 minutes of speaking time plus five minutes for questions and discussion.

Information for speakers

Researchers in all pure mathematics fields attend our seminars, so please aim your presentation at a general mathematical audience.

Room 67-442 has a data projector and a whiteboard.

If you wish to use the data projector, contact us a few days in advance of your talk to avoid technical delays on the day - there's a tight turnaround with room bookings.

Contact us

To arrange to use the projector, contact Benjamin Burton.

To volunteer to talk or to suggest a speaker, email Clement Maria or Huy Nguyen.


Priestley Building (67)