University of Debrecen

I visited University of Debrecen eight times and spent in total around 8 months. I presented my scientific research more than fiveteen times during seminars, including two online contributions (presented in November 2020 and April 2021). During a semester stay in 2017 I attended the course Convex Analysis delivered for Ph.D. students. Moreover, I participated in two PhD qualification processes. The scientific result of these stays are thirteen papers published jointly with Zsolt Pales.
All my stays were financed (or cofinanced) by the host's research grants (awarded by Human Resources Development Operational Programme EFOP and Hungarian Scientific Research Fund OTKA).

University of Rzeszow

I visited University of Rzeszów a number of times for short (few days long) visits. During these stays we (jointly with Jacek Chudziak) studied the properties of means and, in particular, their application to the economic theory. Recently, we started cooperation with Patryk Rela.

University of Zielona Gora

I visited Zielona Góra three times during my Ph.D. studies. These stays were hosted by prof. Witold Jarczyk. In November 2023 we reinstated this cooperation. I delivered more than ten lectures during seminars in Zielona Gora.