Kleine AT
A one-day workshop series for early‑career algebraic topologists in NRW and neighboring regions.
Each edition focuses on a single topic with five talks across the day. All talks are given by participants, and hosts rotate among universities through a democratic voting process.
What is Kleine AT?
Kleine AT (Kleine Algebraische Topologie) is a biannual workshop series designed for Master's and Ph.D. students in algebraic topology from universities across North Rhine-Westphalia and neighboring regions. This one-day intensive workshop focuses on a single, carefully chosen topic within algebraic topology, providing participants with an opportunity to deepen their understanding through a structured series of five one-hour talks given by fellow students.
Kleine AT is a grassroots, community-run initiative where all talks are given by attendees themselves. During each event, attendees propose topics for the next workshop and vote to select the theme. The organizer of the winning proposal then hosts and organizes the next edition at their home institution.
Kleine AT II — [Your Theme Here]
[Date] • [Location]
Organiser: [Your Name]
[Brief description of the theme and what participants will learn]
Schedule
| 09:30–10:00 | Registration |
| 10:00–11:00 | Talk 1: [Your Title] |
| 11:00–11:15 | Break |
| 11:15–12:15 | Talk 2: [Your Title] |
| 12:15–13:30 | Lunch |
| 13:30–14:00 | Discussion & Voting |
| 14:00–15:00 | Talk 3: [Your Title] |
| 15:00–15:30 | Coffee Break |
| 15:30–16:30 | Talk 4: [Your Title] |
| 16:30–16:45 | Break |
| 16:45–17:45 | Talk 5: [Your Title] |
Registration
Registration is now open and will remain open until the day of the event.
Past Events
Kleine AT I — Spectral Sequences and the Even Filtration
Friday, October 10, 2025 • MPIM Lecture Hall, Bonn
Organisers: Tobias Barthel, David Bowman, Wern Juin Gabriel Ong
Attendance: 39 participants from 12 institutions
Schedule and talks
| 09:30–10:00 | Registration |
| 10:00–11:00 | Talk 1: The Filtered Derived Category and the Beilinson t-Structure (Mathieu Wydra) |
| 11:00–11:15 | Break |
| 11:15–12:15 | Talk 2: Décalage I (Gabriel Ong) |
| 12:15–13:30 | Lunch |
| 13:30–14:00 | Discussion & Voting |
| 14:00–15:00 | Talk 3: Décalage II (Fabio Neugebauer) |
| 15:00–15:30 | Coffee Break |
| 15:30–16:30 | Talk 4: Evenness I (Qi Zhu) |
| 16:30–16:45 | Break |
| 16:45–17:45 | Talk 5: Evenness II (Swaminathan Rajagopalan) |