Link to the 2021 IPAC webpage
Link to the 2022 IPAC webpage
Link to the 2023 IPAC webpage
Link to the 2024 IPAC webpage
The theme of the seminar is to work through articles/arXiv preprints which represent important current developments,
at least initially in algebraic combinatorics. The seminar will meet (via zoom) on Tuesdays and Thursdays from
12-1pm Philadelphia time (unless otherwise noted in the schedule below). Each seminar session will have a "host" who will be responsible for presenting
material, but the degree to which the seminar will be a series of lectures or more of a group discussion
may vary from week to week. If you wish to attend the talks email me or Anna to get the zoom link
(jhaglund "at symbol" math.upenn.edu, annapunying "at symbol" gmail.com).
Recordings of the talks will be made if the host is agreeable.
The first two papers we will be working through this summer are "A combinatorial skewing formula for the Rise Delta Theorem" and
"A geometric interpretation for the Delta Conjecture", both coauthored by Maria Gillespie, Eugene Gorsky and Sean Griffin
(available on the arXiv). The seminar will run from early June to mid August.
See the table below for our schedule for the 2025 Summer Season.
The 2025 IPAC Seminar Schedule
| Date | Host | Paper | Lecture Recordings | Lecture Notes | 6/3, 12 noon Philadelphia time | Maria Gillespie (Colorado State) | A combinatorial skewing formula for the Rise Delta Thereom (joint with Eugene Gorsky and Sean Griffin) | Lecture 1 | Notes on Lecture 1 |
| 6/5, noon Philadelphia time | Maria | A combinatorial skewing formula for the Rise Delta Thereom | Lecture 2 | Notes on Lecture 2 |
| 6/10, 12 noon Philadelphia time | Maria | A combinatorial skewing formula for the Rise Delta Thereom | Lecture 3 | Notes on Lecture 3 |
| 6/12, 12 noon Philadelphia time | Sean Griffin (Univ. of Vienna) | A geometric interpretation of the Delta Conjecture (joint with Maria Gillespie and Eugene Gorsky) | Lecture 1 | Notes on Lecture 1 |
| 6/17, 12 noon Philadelphia time | Sean | A geometric interpretation of the Delta Conjecture | Lecture 2 | Notes on Lecture 2 |
| 6/24, 12 noon Philadelphia time | Sean | A geometric interpretation of the Delta Conjecture | Lecture 3 | Notes on Lecture 3 |
| 6/26, 12 noon Philadelphia time | Sean | A geometric interpretation of the Delta Conjecture | Lecture 4 | Notes on Lecture 4 |
| 7/3, 11 am Philadelphia time | Meesue Yoo (Chungbuk National Univ.) | α-chromatic symmetric functions (joint with Jim Haglund and Jaeseong Oh) | Lecture 1 | Lecture 1 Notes |
| 7/8, 11 am Philadelphia time | Jim Haglund (Univ. of Pennsylvania) | α-chromatic symmetric functions | Lecture 2 | |
| 7/10, 11 am Philadelphia time | Jaeseong Oh (KIAS) | α-chromatic symmetric functions | Lecture 3 | |
| 8/5, 10:00am Philadelphia time | Tatsuyuki Hikita (RIMS, Kyoto Univ.) | A Proof of the Stanley-Stembridge Conjecture | Lecture 1 | |
| 8/7, 10:00am Philadelphia time | Tatsuyuki | A Proof of the Stanley-Stembridge Conjecture | Lecture 2 | Lecture 2 Notes |
| 8/12, 10:00am Philadelphia time | Tatsuyuki | A Proof of the Stanley-Stembridge Conjecture | Lecture 3 | Lectures 3 and 4 Notes |
| 8/14, 10:00am Philadelphia time | Tatsuyuki | A Proof of the Stanley-Stembridge Conjecture | Lecture 4 | |
| 8/19, 10:00am Philadelphia time | Tatsuyuki | A Proof of the Stanley-Stembridge Conjecture | Lecture 5 | |
| 8/21, 10:00am Philadelphia time | Tatsuyuki | A Proof of the Stanley-Stembridge Conjecture | Lecture 6 | |