Letter with attachment warm comments on the author's stay in Akademgorodok; enclosed is a copy of the letter to Prof. Hoare concerning his invitation to the MFCS'77 Symposium Date: 23.11.1976 Original document language: russian Authors: Jozef Gruska Persons: Igor V. Pottosin, C. A. R. Hoare Addressee: Andrei Petrovich Ershov