Jan Hladký
Email: hladky@cs.cas.cz
I am a researcher at the Institute of Computer Science of the Czech Academy of Sciences. I am interested in discrete mathematical structures, and graphs in particular. Most of my work has been in extremal graph theory, the recently emerged theory of graph limits, and on the links this theory provides to fields such as real analysis and probability theory.
Information about other researchers, events, and openings at the Institute in the area of discrete mathematics can be found here.
Directory
Recent Research Grants
Recent & Upcoming Talks
- Sep, 2026: From Erdős–Rényi to geometry: an introduction to random graph models and their limits, Random metric graphs, Charles University.
- Jul, 2026: Inhomogeneous random graphs, Foundations of Computational Mathematics, University of Vienna.
- May 20, 2026: Hamiltonicity of inhomogeneous random graphs, Meeting on graphs and probability, Vilnius University (virtual).
- Apr 16, 2026: Inhomogeneous random graphs, Discrete Math Seminar, Iowa State University (virtual). [slides]
- Feb 24, 2026: Digraphons as operators, MAFIA seminar, Czech Technical University.
- Jul 1, 2025: Graph Limits, DSc Degree Defense, Czech Academy of Sciences. [slides]
... and older talks here.
Events Organized
- Prague Schools on Discrete Mathematics: Co-organized the 2016, 2018, and 2020 editions alongside Zdeněk Dvořák.
- Extremal and Probabilistic Combinatorics Webinar: Co-organized with Diana Piguet, Jan Volec, and Liana Yepremyan.
- Workshops & Schools: Organized the Workshop Graph Limits in Bohemian Switzerland (2018), Workshop on Extremal and Probabilistic Combinatorics in England (2010), and the Spring Schools in Combinatorics (2007, 2008).
Statements of Practice
Position on Collaboration and International Law: I do not take part in any form of cooperation with institutions that operate in violation of international law. This includes joint research projects, exchange or partnership agreements, co-organized events, and visits or talks hosted by such institutions. Nor do I collaborate with researchers affiliated with them. A prominent example is Ariel University, which was established and operates in the Israeli settlement of Ariel in the occupied West Bank. In its
Advisory Opinion of 19 July 2024, the International Court of Justice concluded that Israel's continued presence in the Occupied Palestinian Territory is unlawful and that Israel must cease all new settlement activities and evacuate all settlers. This personal stance is not imposed on students or postdocs working on my grants, nor does it factor into my evaluations on hiring committees.
Position on Open Access: In combinatorics, journals with good open access policies include the
Electronic Journal of Combinatorics,
Discrete Analysis, and
Advances in Combinatorics, among others. While my papers may occasionally be published in journals with restrictive policies, the preprints on
arXiv reliably reflect the final journal versions, including precise theorem numbering.
Position on Climate Sustainability: I am actively concerned with the carbon footprint of my research. I ceased flying for academic purposes at the beginning of 2019. Consequently, I prioritize virtual collaboration and do not invite researchers for talks if their travel would generate substantial greenhouse gas emissions. This personal stance is not imposed on students or postdocs working on my grants, nor does it factor into my evaluations on hiring committees.