Cancelled trip to Poland and GDR (1962)
FranceCancelled trips
Stanfordcancelled trip
Austriacancelled trip
Cancelled trip to Denmark, 1979
Cancelled trip to France (1987)A.Ershov was supposed to participate in the IFIP TC-2 34th meeting and to discuss with French colleagues subtopic "Theoretical programming" recently singled out from the "Informatics" topic of Soviet-French collaboration program
Other cancelled trips
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