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Yearly International Scientific and Practical Conference "Information Technologies and Security".

International Scientific Conference "Digital Transformation, Cyber Security and Resilience" (DIGILIENCE 2019), Sofia, Bulgaria.

Fundamental paper published in the International Journal of General Systems, 2019, VOL. 48, NO. 4, 362–381 «The (logarithmic) least squares optimality of the arithmetic (geometric) mean of weight vectors calculated from all spanning trees for incomplete additive (multiplicative) pairwise comparison matrices» authored by Sandor Bozoki & Vitaliy Tsyganok.

International Symposium on the Analytic Hierarchy / Network Process (ISAHP-2016), London, UK.

Defense of the dissertation «A method for defining semantic similarity of objects in knowledge bases of expert decision support systems» for the PhD scientific degree of engineering sciences by O. Andriichuk

COST Action IC1205 on Computational Social Choice: Action Meeting in Glasgow, UK.

International Symposium on the Analytic Hierarchy / Network Process (ISAHP-2014), Washington, DC, USA.

Defense of the dissertation «Models and methods of expert decision-making support for weakly-structured complex systems» for the degree of doctor of engineering sciences by V.Tsyganok.

XI-th International Symposium on the Analytic Hierarchy / Network Process (ISAHP-2011), Sorrento, Naples, ITALY.

Annual Conference of Operational Research Society - OR-52, London, UK.

X-th International Symposium on the Analytic Hierarchy / Network Process (ISAHP-2009), Pittsburgh, PA, USA.