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\centerline{{\bf CURRICULUM VITAE}}
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Name:\>                    {\bf Yuriy Vladimirovich Kryakin}
\\
Date and place of birth: \>January 23, 1955, Novosibirsk, USSR\\
Marital status:          \> Married, two children                \\
Citizenship:             \> Ukrainian                            \\
\\
Address (office):       \> Wroclaw University\\
                         \> Mathematical Institute\\
                         \> Pl Grunwaldzki 2/4,\\
                         \> 50-384 Wroclaw, Poland\\ \\
%Address (home):         \> Pasteura 18 apt. 4,\\
%                        \> 50-367 Wroclaw, Poland \\
Telephone (home):       \>  +1 646 226 1969                       \\
e-mail: \> {\tt kryakin@math.uni.wroc.pl  \ kryakin@gmail.com}
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\noindent
{\bf Languages:}
Russian -- mother tongue, Polish -- fluent, English -- good.

\medskip
\noindent
{\bf Academic Degrees:}
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M. Sc. (Mathematics)\>  Odessa State University, Odessa, Ukraine, 1978          \\
Ph. D. (Mathematics)\>  Saratov State University, Saratov, Russia, 1985 \\
Habilitation (Mathematics)\>Wroclaw University, Wroclaw, Poland, 2000
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\noindent
{\bf Title of Ph. D. Thesis:} {\em Approximation of functions on the unit circle in
spaces $L_p$ and $H_p$} (in Russian).
{Supervisor: E.~A.~Storozhenko, Odessa State University, Odessa, Ukraine}.

\medskip
\noindent
{\bf Title of Habilitation Thesis:}
{\em Local approximation by polynomials and Whitney constants}.

\medskip
\noindent
{\bf Academic Positions:}
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1978 -- 1982    \> Odessa Polytechnic Institute, Assistent Professor \\
1986 -- 1988    \> Odessa Polytechnic Institute, Lecturer\\
1988 -- 1994    \> Odessa Polytechnic Institute, Associate Professor \\
1994 -- 1997    \> Odessa State University, Chair of Mathematical Analysis, \\
                \> Postdoctoral Fellow\\
1997 -- 1999    \> Odessa State Polytechnic University, Associate Professor\\
2000 -- 2002    \> South Ukrainian State Pedagogical University,\\
                \> Chair of Mathematical Analysis, Senior
                Researcher.\\
1999 -- 2020   \> Wroc\l{a}w University, Matematical Institute, Wroc\l{a}w -- Poland,\\
                \> adjunkt\\
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\newpage
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%\noindent
\medskip
{\bf Scientific Visits:}
\begin{enumerate}
\item
France, Marseilles, Center of Theoretical Physics, CNRS, 1998 (1 month).

\item
Spain, Madrid, University Autonoma of Madrid, 1998 (1 week).

\item
France, Marseilles, Toulon University, 1999 (2 weeks)

\item
Germany, Darmstadt, Darmstadt University, 1999 (2 months),
Visiting Research Fellow, DAAD grant

\item
U.S.A., Columbia, SC,
Industrial Mathematical Institue, 2000 (1 week)

\item
U.S.A., Nashville, TN,
Vanderbilt University, 2000 (1 week)

\item
England, Cambridge DAMTP, 2006 (1 week)

\end{enumerate}

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\medskip
{\bf Grants:}
\begin{enumerate}
\item
Research grant awarded by the Joint Fund of the Government of Ukraine and
International Science Foundation, "Embeddings, approximation and local
properties of function spaces", January, 1 -- December, 31, 1995.

\item
CSMEE--grant from the Organizing Committee of the ICM'98.

\item
Grant of Polish founds for science 2006-2008, no 20101631/1206

\end{enumerate}

\medskip
{\bf Duties and Activities:}
\begin{enumerate}

\item
Referee of Ph. D. theses: A.~Korenovskii (1988), D.~T.~Shon
(1990), P.~M.~Volnyakov (1992), A.~K.~Lerner (1998), O.D.Zhelnov
(2004).

\item
Ph. D. students:  N.~Dolmatova (2014). \\ 
Thesis "Special moduli of continuity and sharp Jackson type inequalities".
%Reviewer in ``Mathematical Reviews" (since 1998)



\end{enumerate}


{\bf Courses Taught}:

Wroclaw University, Institute of Computer Science : Calculus I-II, Complex Analysis, Differential Equations,  lectures and classes
(1999--2020, in Polish).

Odessa National Polytechnic University : Entry Levels Courses(Calculus I-II),   lectures and classes
(1978--1998, in Russian).



\newpage
\medskip
\centerline{{\bf LIST OF  PUBLICATIONS}}

\begin{enumerate}[font=\small]
\small
\item {\sl Yu.V. Kryakin.}
{ Jackson theorems in $H_p, 0<p<\infty$},
{\sl Izv. Vyssh. Uchebn. Zaved. Mat.,} \ {\bf 8} \  (1985) \ 19--23 \ (in Russian).
{\sl English transtation: Soviet Math. [Iz.VUZ],} {\bf 29 (8)} (1985) \ 24--29.



\item {\sl Yu.V. Kryakin.}
{ Best local approxiamations},
{\sl Theory of Functions and Approxiamtion, Part 2 (Saratov, 1984), Saratov Gos. Univ.,
Saratov} \  1986 \  142--145 (in Russian).

\item { \sl Yu.V. Kryakin.}
{ Whitney constants},
{ \it Mat. Zametki,} \  {\bf 46 (2) } \ (1989) \ 155--157 (in Russian).


\item { \sl Yu.V. Kryakin.}
{ On the theorem of H.~Whitney in spaces $L_p, 1\le p\le\infty$},
{\sl Math. Balkanica, New Series,} \  {\bf 4}\  (1990) \ 258--271.


\item {\sl L.G. Kovalenko, Yu.V. Kryakin.}
{ Whitney constants in the classes $L\sp p, 1\le p<\infty$},
{\sl Izv. Vyssh. Uchebn. Zaved. Mat.,} \ {\bf  1} \ (1992) \ 69--77 (in Russian).

\item {\sl Yu.V. Kryakin.}
{ On a theorem of Hardy and Littlewood},
{\sl Mat. Zametki,} \ {\bf 53(2)} \ (1993) \ 78--83 (in Russian).
{\sl English translation: Math. Notes,} \ {\bf 53} \ (1993) \ 167--171.


\item {\sl Yu.V. Kryakin.} \
{ Whitney constants bounded by two},
{\sl Mat. Zametki,}  {\bf 53(5)} \ (1993) \  158--160 (in Russian).
{\sl English translation: Math. Notes,} \  {\bf 53} \ (1993) \  560--562.


\item {\sl Yu.V. Kryakin.} \
{ Exact constants in the Whitney theorem},
{\sl Mat. Zametki,} \  {\bf 54(1) } \ (1993) \ 34--51 (in Russian).
{\sl English translation: Math. Notes,} \  {\bf 54} \ (1993) \ 688--700.


\item {\sl Yu.V. Kryakin.} \
{ On a theorem and constants of Whitney},
{\sl Mat. Sbornik,} \ {\bf 185(3)} \  (1994) \  25--40 (in Russian).
{\sl English translation: Sbornik, Mathematics,}  {\bf 81} \ (1995) \ 281--295.


\item {\sl Yu.V. Kryakin, E.A. Storozenko.}
{ On a theorem of Whitney in the $L\sp p$-metric, $0<p<\infty$},
{\sl Mat. Sbornik,} \  {\bf 186(3)} \  (1995) \  131--142 (in Russian).
{\sl English translation: Sbornik, Mathematics,} \  {\bf 186} 
\  (1995) \  435--445.


 \item {\sl Yu.V. Kryakin, M.D. Takev.}
{ Whitney interpolation constants},
{\sl Ukrain. Mat. Zh.,} \  {\bf 47} \ (1995) 1038--1043 \ (in Russian) \


\item {\sl Yu.V. Kryakin, M.D. Takev.}
{ On the interpolation constants of H.~Whitney},
{\sl Mat. Zametki,} \  {\bf 59} (1996) 461--463 (in Russian).
{\sl English translation: Math. Notes,} \  {\bf 59} \ (1996) \ 330--332.


\item
{\sl Yu.V. Kryakin.}
{ On approximation by Chebyshev splines in $L_p$-metrics},
{\sl Volyn Math. Bulletin,} \  {\bf 3} \ (1996) \ 67--71 \ (in Russian).

\item {\sl Yu.V. Kryakin.}
{ On functions with a bounded $n$-th differences},
{\sl Izv. Ross. Akad. Nauk Ser. Mat.,} \  {\bf 61(2)} \ (1997) \  95--110 (in Russian).
{\sl English translation: Izv. Math.,} \  {\bf 61} (1997) \ 331--346

\item {\sl Yu.V. Kryakin.}
{ On the local approximation of functions by polynomials and  quasipolynomials},
{\sl Dokl. Akad. Nauk,} \  {\bf 355} \  (1997) \ 157--159 (in Russian).
{\sl English translation: Doklady Mathematics,} \ {\bf 56}  (1997) \ 505--507

\item 
{\sl Yu.V. Kryakin.}
{ On the local approximation by quasi-polynomials},
{\sl In: Recent Progress in Inequalities,
Kluwer Academic Publisher, Dordrecht,} \ (1998) \  475--480.

\item {\sl Yu.V. Kryakin.}
{Chebyshev splines and $K$-functionals in the $L_p$-metric},
{\sl Dopov. Nats. akad. Nauk Ukr. Mat. Prirodoz. Tekh. Nauki,} \ {\bf 6} \
(1998) \ 27--31 (in Russian)

%\item
%Polynomial Interpolation and Whitney's Constants,
%In: ICM'98, Abstracts of Short Communications,
%Berlin, August 18-27, 1998, p. 138.

\item {\sl Yu.V. Kryakin.}
{ On approximation by Chebyshev splines in the $L_p$- metric, $p>0$},
{\sl Ukrain. Mat. Zh.,} \ {\bf 50} (1998) 1193--1201 (in Russian).
English translation: Ukrainina Math. J. {\bf 50} \ (1998) 1365--1375


\item
{\sl Yu.V. Kryakin.}
{ On approximation by complex splines in $L_p,p>0$},
{\sl In: Fourier Series: Theory and Applications (Kamenets-Podol'sky, 1997).
Pr. Inst. Mat. Nats. Akad. Nauk Ukr. Mat. Zastos,} \ {\bf 20} \  (1998) \
133--141 (in Russian).


\vskip .4cm
\item
{ \sl Yu. Kryakin, W. Trebels.} $q$--Moduli of continuity in
$H^p(D), \ p>0$, and an inequality of Hardy and Littlewood, {\sl
Journal of Approximation Theory}, {\bf 115} \ (2002)  \ 238--259;
doi: 10.1006{/}jath.2001.3656.

\item
{\sl  T.J. Cole, Yu.V. Kryakin.} Letter to editor. Sympercents:
symmetric percentage differences on the $100 \log_e$ scale
simplify the presentation of $\log$ trasformed data,   {\sl
Statistics in Medicine}, {\bf 21} (2002) \ 2287-2290; doi:
10.1002{/}sim1008.

\item {\sl J. Gilewicz, Yu.V. Kryakin, I.A. Shevchuk.}
Boundedness by 3 of Whitney Interpolation Constant. {\sl Journal
of Approximation Theory}, {\bf 119}  (2002) \ 271--290;\\ doi:
10.1006{/}jath.2002.3732.

\item { \sl Yu.V. Kryakin.} Whitney's Constants and Sendov's
Conjectures. {\sl Mathematica Balka\-ni\-ca}, \ {\bf 16} \ Fasc.
1-4 (2002) \ 235--247.

\item {\sl J. Gilewicz, Yu.V. Kryakin.}
Froissart doublets in Pade approximation in the case of polynomial
noise. {\sl Journal of Computational and Applied Mathematics},
{\bf 153} \ (2003) \ 235--242.

\item{\sl Yu. Kryakin.} {Bohr--Favard inequality for differences and
constants in Jackson--Stechkin theorem} {ArXiv.math.CA/0512048} \
(2006) \ 1--6.


\item{\sl  Yu. Kryakin.} {Whitney's theorem for oscillating on $R$
functions} { arXiv.math. CA/0612442} \ (2006) \ 1--6.

\item{\sl A.G. Babenko, Yu.V. Kryakin.} {Approximation of
step functions by trigonometric polynomials in $L$.}  {
Proceedings International Conference on "Modern Problems in
Mathematics, Mechanics and Informatics" Tula,}  (2006) \ 1--25.


\item{\sl S. Foucart,  Yu. Kryakin and A. Shadrin.}
{ On the exact constant in Jackson--Stechkin inequality for the
uniform metric.} \ {\sl Constructive Approximation,} \ {\bf 29}, \ (2009) \ 157--179; doi:10.1007/s00365-008-9039-6.

\item{\sl A.G. Babenko, Yu.V. Kryakin.}
Integral approximation of the characteristic function of an interval by trigonometric polynomials. \
{\sl Proceedings of the Steklov Institute of Mathematics,} \  {\bf 264}, (2009) \ 19--38;
doi: 10.1134/S0081543809050022.



\item{\sl A.G. Babenko, Yu.V. Kryakin.}
Integral Approximation of the Characteristic Function of an Interval and the Jackson Inequality in $C(T)$ , \ 
{\sl Proceedings of the Steklov Institute of Mathematics,} \ {\bf 266} \ (2009) \ 56--63; 
doi: 10.1134/S0081543809060054.

\item{\sl A.G. Babenko, Yu.V. Kryakin, V.A. Yudin.}
On a Result by Geronimus, \ {\sl Proceedings of the Steklov Institute of Mathematics,}  {\bf 273(1)} \ (2011) \ 37--48;
\ doi: 10.1134/S008154381105004X.

\item{\sl A.G. Babenko, Yu.V. Kryakin, V.A. Yudin. }
One-Sided Approximation in $L$ of the Characteristic Function of an Interval by Trigonometric Polynomials, \
{\sl Proceedings of the Steklov Institute of Mathematics,}  \ { \bf 280 (suppl 1)} \ (2011) \ 539--552;
\\ doi: 10.1134/S0081543813020041.

\item{\sl A.G. Babenko, Yu.V. Kryakin, P.T. Staszak. }
Special Moduli of Continuity and the Constant in the Jackson–Stechkin Theorem, \ {\sl Constructive Approximation,}
\ {\bf  38} \ (2013) \ 339--364;\
doi: 10.1007/s00365-013-9210-6.

\item{\sl A.G. Babenko, Yu.V. Kryakin, N.V. Dolmatova. }
Sharp Jackson Inequality with a Special Modulus of Continuity, \ {\sl Proceedings of the Steklov Institute of Mathematics,} \ {\bf 284 (suppl 1)} \ (2014) \ 1--18;
\ doi: 10.1134/S0081543814020047.

\item{\sl A.G. Babenko, Yu.V. Kryakin. }
On Constants in the Jackson Stechkin Theorem in the Case of Approximation by Algebraic Polynomials 
{\sl Proceedings of the Steklov Institute of Mathematics,} \ {\bf 303(1)} \ (2018) \ 18-30; \
doi: 10.1134/S0081543818080035.

\item{\sl A.G. Babenko, Yu.V. Kryakin. }
Modified Bernstein Function and a Uniform Approximation of Some Rational Fractions by Polynomials,
{\sl Proceedings of the Steklov Institute of Mathematics,} \ {\bf  303(suppl 1)} \ (2018) \ 45--59; \
doi: 10.1134/S008154381809\\0055.

\item{\sl A.G. Babenko, Yu. Kryakin. }
Special Difference Operators and the Constants in the Classical Jackson-Type Theorems, \
 {\sl in book: Topics in Classical and Modern Analysis} \ (2019) \ 35--46; \
doi: 10.1007/978-3-030-12277-5{\_}2.

\item{\sl A.G. Babenko, Yu.V. Kryakin. }
On the norms of Boman-Shapiro difference operators, \
{\sl Trudy Instituta Matematiki i Mekhaniki UrO RAN,} \ \ {\bf 26(4)} 
(2020) \ 64--75 \ (in Russian); \
doi: 10.21538/0134-4889-2020-26-4-64-75.


\end{enumerate}

\end{document}
