A retrospective on research visits of Paul Butzer’s Aachen research group to North America and Western Europe

A retrospective on research visits of Paul Butzer’s Aachen research group to Eastern Europe and Tenerife

“…The Aachen group, which consisted of E. Görlich (1940-2014) 1 , W. Koehnen, R. J. Nessel, K. Scherer ) and E. L. Stark (1940Stark ( -1986 and myself (all supported by the DFG), now had their first great opportunity to meet not only a large group of Russian approximation theorists, but also many others from Eastern Europe, and also the West.…”

“…Returning to Tibor Pogány, whom I met again at the "Symposium on Fourier Analysis, Interpolation and Signal Processing", conducted by Maurice Dodson at York 1988 (see [1]), it was with him that I wrote three joint papers [33][34][35] concerning the Omega function I had introduced with S. Flocke and M. Hauss in "Euler functions E α (z) with complex α and applications" [36].…”

“…Although Tenerife, the largest of the Canary Islands, is a part of Spain, I decided to add it to this paper and not to [1]. The reason is that my visits to Tenerife were also connected with research visits to Belarus.…”

“…Kerstin Springsfeld 22 Of course there were also a large number of outstanding male students. In our article [1] we listed nine of our male students who became professors at German universities during the period 1958 to 1970. In the succeeding period there were the following nine: Franz Ebersoldt 23 , Hermann Schulte 24 , Rudolf Stens 25 , Wolfgang 16 U. Schmidt-Westphal, nee Westphal, received her diploma and doctorate (1969) degrees, as well as her Habilitation degree (1974) under my direction.…”

“…Our paper "A retrospect on earlier research visits of members of the Aachen research group to North America and Western Europe" [1] dealt with the research visits of the Aachen chair to the USA and Canada, and visits to 13 countries in Western Europe. The present joint paper recounts the research visits to Eastern Europe.…”