Number Theory Seminar @ University of Melbourne
11:00-12:00 Thu.
Alex Ghitza and I are running a working seminar on things number-theoretic. It runs at 11:00-12:00 Thu. (Melbourne time) this semester via Zoom. Please go to the Number Theory Research Group website where you can find a link to join our mailing list. You will receive the Zoom link and announcements of talks.
The current focus is modular forms and Siegel modular forms. We plan to follow largely the book, The 1-2-3 of Modular Forms by
Jan Hendrik Bruinier, Gerard van der Geer, Günter Harder and Don Zagier. We aim to introduce students to modular forms and their generalisations. This should offer a nice pathway into arithmetic geometry and help us understand research topics such as congruences between automorphic forms on different groups.
The focus of 2021S1 is the global theory of Jacquet-Langlands Theory. We will make use of the local theory that we discussed last semester. We will recall the results when needed, so it is OK if you missed the first season (link containing seminar notes). We will continue to follow Notes on Jacquet-Langlands' Theory by Godement.
21 Oct. 2021
Singular Forms, Theta Series, and Fourier-Jacobi Expansions
Chenyan Wu (the University of Melbourne)
14 Oct. 2021
Eisenstein series in the Siegel setting
Alex Ghitza (the University of Melbourne)
7 Oct. 2021
Introduction to Siegel Modular Forms
Chenyan Wu (the University of Melbourne)
30 Sept. 2021
L-series (continued)
Alex Ghitza (the University of Melbourne)
16 Sept. 2021
Theta series
Simon Thomas (the University of Melbourne)
9 Sept. 2021
Hecke operators, Hecke eigenfunctions, and related L-series
Alex Ghitza (the University of Melbourne)
2 Sept. 2021
Examples of Modular Forms: Eisenstein Series and the Discriminant Function (Part 2)
Chenyan Wu (the University of Melbourne)
26 Aug. 2021
Modular Groups, Modular Functions, and Modular Forms (part 2)
Alex Ghitza (the University of Melbourne)
Examples of Modular Forms: Eisenstein Series and the Discriminant Function
Chenyan Wu (the University of Melbourne)
19 Aug. 2021
Modular Groups, Modular Functions, and Modular Forms
Alex Ghitza (the University of Melbourne)
12 Aug. 2021
Introduction to Modular Forms
Alex Ghitza (the University of Melbourne)
15 July, 2021
Eisenstein congruences for GL(2)
Alex Ghitza (the University of Melbourne)
It is possible for an Eisenstein series and a cusp form of the same weight to be congruent modulo a prime number. This phenomenon was first noticed by Ramanujan and its natural generalisations were subsequently explored by several authors. I will discuss some of these generalisations, following mostly the 2014 paper "Ramanujan-style congruences of local origin" by Dummigan and Fretwell.
8 July, 2021
Report on Lifting Puzzles and Congruences
Chenyan Wu (the University of Melbourne)
17 June, 2021
Archimedean Theory II
Last talk of the semester (2021S1)
Lance Gurney (the University of Melbourne)
10 June, 2021
Archimedean Theory I
Lance Gurney (the University of Melbourne)
3 June, 2021
The Converse Theorem
Chenyan Wu (the University of Melbourne)
20 May, 2021
Global L-functions II
Alex Ghitza (the University of Melbourne)
6 May, 2021
Global L-functions I
Alex Ghitza (the University of Melbourne)
29 Apr. 2021
Uniqueness of global Whittaker model and Multipicity One theorem for GL(2)
Chenyan Wu (the University of Melbourne)
22 Apr. 2021
Review of Admissible Representations and Whittaker Models
Chenyan Wu (the University of Melbourne)
15 Apr. 2021
Global Hecke Algebra
Simon Thomas (the University of Melbourne)
8 Apr. 2021
Easter Break. No talk.
1 Apr. 2021
Decompostion of Space of Cuspidal Functions; Tensor Product Decomposition
Alex Ghitza (the University of Melbourne)
25 Mar. 2021
Decomposition of Space of Cuspidal Functions: Compact Operators
Chenyan Wu (the University of Melbourne)
18 Mar. 2021
Adelic Groups and Cuspidal Functions for GL(2)
Chenyan Wu (the University of Melbourne)