Grzegorz Ryn

PhD Student - Computer Science

I am a PhD student at Theoretical Computer Science, Jagiellonian University, working under supervision of prof. Jakub Kozik.

My research focuses on random instances of Constraint Satisfaction Problems, particularly on probabilistic algorithms and the gap between algorithmic and existential results.

Education

Years	Degree	Institution
2025/26 – present	PhD, Computer Science (direct entry after BSc)	Jagiellonian University
2022/23 – 2024/25	BSc, Theoretical Computer Science	Jagiellonian University

Experience

Period	Role	Company
Summer 2024	Software Engineering Intern	Splunk
Summer 2023	Research Assistant	Huawei

Works

Technical note on Friedgut’s sharp threshold theorems for non-uniform hypergraphs

Grzegorz Ryn

PDF

Conferences & Workshops

Sofsem 2026

February 2026 - Kraków, Poland
Eurocomb'25

Talk: Two-colorability of random non-uniform hypergraphs

August 2025 - Budapest, Hungary

Slides Extended abstract
Random Structures & Algorithms 2025

Talk: Two-colorability of random non-uniform hypergraphs

August 2025 - Vienna, Austria

Slides
Polish Combinatorial Conference 2024

September 2024 - Będlewo, Poland

Student conferences

Oblicze 2025

Talk: Nonrepetitive sequences

May 2025 - Poznań, Poland

Slides
OSSM 2025

Talk: Two-colorability of random hypergraphs

April 2025 - Kraków, Poland

Slides
Wrocławskie Spotkania Szkockie 2025

Talk: Thresholds in random graphs

March 2025 - Wrocław, Poland

Slides

Activities

Volunteer — Sofsem 2026 2026
Treasurer — Student Mathematical Society, Jagiellonian University 2024 – 2025
Co-organization of numerous events including conference, workshops, winter/summer schools and trips to conferences.

Managed the annual budget of ~80k PLN.
Co-organizer — XXVI International Workshop for Young Mathematicians "Combinatorics" 2025
Co-organized the largest mathematics workshops for students in Poland, with over 60 participants and 10 invited speakers.
Co-organizer — OSSM 2025 2025
Co-organized one of the largest mathematics student conferences in Poland, with over 100 participants.

Teaching

Office hours Thursdays 16:00 - 17:30, room 3152

Object Oriented Programming — Laboratory Summer 2025/26
Algorithms and Data Structures 1 — Laboratory Winter 2025/26

Programming competitions

Since 2022, I have regularly prepared lectures and workshops for high school students training for the Polish Olympiad in Informatics. I have also co-organized training camps and prepared problems for them.

Contact

Email (first name).(last name)@doctoral.uj.edu.pl

Office Room 3152, Faculty of Mathematics and Computer Science

GitHub @Samboor LinkedIn profile