Volume 30 (2023), Number 2--4, are special issues dedicated to Prof. Roger J-B Wets on the occasion of his 85th birthday. We give an overview of the scientific life of Prof. Wets.

Contact details are reproduced from the original publication and may be historical.

Johannes O. Royset

Operations Research Dept., Naval Postgraduate School, Monterey, U.S.A.

joroyset@nps.edu

T. Hoheisel, J. O. Royset. “Foreword to Volume 30, Number 2--4.” Journal of Convex Analysis 30 (2023), No. 2, 403–406.