I wish to thank all friends, colleagues and students
of Wilhelm for their generous and dedicated assistance in the preparation
of this commemorative volume. In particular I thank
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Professor S.P. Onufrijchuk and Docent O.I. Prylypko for scanning
the text,
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Dr. V.M. Boyko
for typesetting and editing the text and
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the Department of Applied Research of the Institute of Mathematics
in Kyiv, where Wilhelm was Head of Department for many years, for the construction
of his web page.
I give special thanks to my children, Marianna
and Bohdan, and to my son-in-law, Norbert
Euler, for their great support and assistance in the preparation of
the scientific heritage of Wilhelm.
I shall be very grateful to receive all memories and recollections
of Wilhelm as the person and the scientist.
With my deepest thanks
Fushchych Ol'ga Ivanivna
Please address all correspondence to the E-mail address:
appmath@imath.kiev.ua
or the postal address:
Fushchych Ol'ga Ivanivna
Anri-Barbus Street 22/26, apt.73
03150 Kyiv
Ukraine