## Notes

Below are links to course notes for the minicourses of the Simons Semester on Geometric and Analytic Group Theory held in 2019 at IMPAN in Warsaw. **Any mistakes in the notes below are not due to the speakers.**

**04.16–04.18: Yves Cornulier,***Near actions*- Notes provided by Yves Cornulier. Handwritten notes were initially taken by Piotr Rudnicki.
**04.23–04.25: Michael W. Davis,***Examples of nonpositively curved cube complexes***04.30–05.02: Jon McCammond,***Braid groups and non-positive curvature*- Notes (next to the Cartan-Hadamard theorem is a non-example - X is not complete)
- Note taker: Mikołaj Czapp

**05.07 - 05.09, 05.14–05.16: Victor Chepoi,***Helly graphs and Helly groups***05.14–05.16: Denis Osin,***Acylindrically hyperbolic groups*- Lecture 1
- Lecture 2
- Lecture 3
- Note taker: Suraj Krishna

**05.28–05.30: Daniel T. Wise,***An invitation to coherent groups*- Part 1
- Part 2
- Note taker: Piotr Rudnicki

**06.04–06.06: Roman Sauer,***Introduction to L*^{2}–Betti numbers- Lecture 1
**06.11–06.13: Uri Bader,***Algebraic Representations of Ergodic Actions*- Note taker: Piotr Rudnicki

**06.18–06.20: Aaron Brown,***Smooth ergodic theory and rigidity of lattice actions*- Note taker: Mikołaj Czapp