From 17th of August till 23rd of August we (with officemates) participated at ADFOCS 2025 ↗ in Saarbrücken ↗’s MPI ↗. We travelled Warsaw-Berlin-Saarbrücken via trains which was pretty comfortable, aside from the train cancellation that left us stranded in Mannheim at midnight. Anyway, we departed on Sunday morning and arrived on Monday around 8:00. We checked-in the hotel that on our arrival was just experiencing a fire-alarm, and then – hoping that was all the excitement for the week – travelled to MPI. There, we got shorts and badges, that also worked as free-travel cards for busses.

Throughout the week there were 3 main topics; sparsity by Michał Pilipczuk ↗; expanders by Thatchaphol Saranurak ↗, and forbidden induced subgraphs by Maria Chudnovsky ↗. It was excellent to get a thorough refresher on sparsity, update on the current state in the study of forbidden induced subgraphs, and some idea of what expanders are about. There also was a Wednesday afternoon visit to the nearby Abenteuerpark-Saar ↗ ropes course among trees. Overall, I think ADFOCS is nice if the topics are relevant to ones interests.