I was born on March 2, 1947 in Leningrad, now (and originally) St.Petersburg.

I had the lucky chance to go to two very good schools with extra emphasis on mathematics and physics:

- school #239 in Leningrad
- boarding school ("internat") #18 at Moscow State University

Being a schoolboy, I successfully participated in Leningrad (1960-1963),
Moscow (1964) and All-Union
(1961-1964) Mathematical

Olympiads. In 1964 I have got first prize at the Sixth International
Mathematical Olympiad hold in Moscow.

In 1969 I graduated from Deparment of Mathematics and Mechanics of Leningrad State University.

I continued my study at LOMI, Leningrad Department of Steklov Institute of Mathematics. Now I work there as the Head of Laboratory of Mathematical logic.

I have written more than 60 papers and one book. My co-authors were Luc Boasson, William W.Boone, Patrick Cegielski, D.J.Collins, Martin Davis, Anatolii Degtyarev, Volker Diekert, Boris Fedotov, Irène Guessarian, Richard K.Guy (thanks to him my Erdös number is equal to 2), James P.Jones, Anca Muscholl, Denis Richard, Julia Robinson, Géraud Sénizerguez, Andrei Terekhov, Andrei Voronkov.

My doctoral thesis was devoted to the negative solution of Hilbert's tenth Problem which is one of the 23 problems posed by David Hilbert in his famous lecture "Mathematische Probleme".

My book about the 10th problem,
"Desyataya
problema Gilberta", was published originally in 1993 in Russian by
NAUKA Publisher, Moscow.

Its
English translation was published
under the title
"Hilbert's
tenth problem" in 1993 by
The
MIT Press, Boston, the USA in the series
Foundations
of Computing.

In 1995
French translation of
my book was published under the title
"Le
dixième problème de Hilbert. Son indécidabilité"
by
MASSON Editeur, France.

In 1996 I was awarded the title *Docteur Honoris Causa *
de l'Université d'Auvergne, France.

In 1997 I was elected correspondent member of the Russian Academy of Sciences.

In 1998 I was granted Humboldt Research Award to Foreign Scholars.

I am membre associe of LLAIC, Laboratoire de Logique, Algorithmique et Informatique de Clermont 1, France.

I am member of:

- St.Petersburg Mathematical Society,
- currently Vice-President (elected in 1998)
- American Mathematical Society;
- Association for Symbolic Logic.

- Journal "Discrete Mathematics and Applications";
- Publishing House PHASIS;
- Journal "Computer Instruments in Education".

URL of my home page is http://logic.pdmi.ras.ru/~yumat/index.html.