thanks for invitation and offers one more theme for discussion

thanks for invitation, adds to the list of topics and potential participants

thanks for invitation and hopes to take part

thanks for information and hopes to attend the symposium

has learned about the symposium from his friend Vuillemin, which excited him very much; asks if it is possible to take part though his works relate applied probability

information on arrival and departure, accomodation, program, and the list of participants

copy in Russian

a list of potential participants, their remarks to the topics of discussion

copy in Russian

on preparation of the invitations to Urgench Symposium; Russian versions are sent to Knuth for approval and translation

informs with great reluctance that he cannot attend the symposium

plans to spend more time in the USSR, shows a keen interest in old Khorezm

sends a letter from A.P. Ershov with official invitation to attend the symposium

excuses for not including his name in the first list of potential participants and gives explanations

is happy to confirm his participation

replies to the invitation to attend the symposium

suggests to shift the symposium a few days later

the date of the symposium is not the best for him but Urgench is preferable

refuses to come because of signing a petition against political repressions in the USSR

thanks for invitation but cannot come due to lack of travel funds