on having sent Engelien's and Pietschker's papers.

thanks for invitation, will certainly come, gives some ideas about the program and the names of potential participants

to L.Pietschker's paper.

by N.J.Lehmann to copies of M.Engelien's paper.

Thanks for the invitation to the Symposium, which proved to be very interesing; sends the paper manuscript corrected according to Springer publishing rules