**Uldis RAITUMS**

Institute of Mathematics and Computer ScienceProfessor Uldis RAITUMS University of LatviaRaina bulvaris 29Riga, LV 1459LatviaPhone: +371 7211421 E-mail: uldis.raitums@mii.lu.lv |

** Born:** July 6, 1940, Riga, Latvia

*Interests: *

- Optimization Theory and Applications
- Applied Mathematics
- Partial Differential Equations

* Languages: *Latvian, English, Russian.

*Education*

- University of Latvia (Faculty of Physics and Mathematics), 1963
- Postgraduate, University of Latvia, 1967
- Dr.mat. (Candidate of Science in former USSR, Ph.D. in Western countries), University of Latvia, 1969
- Dr.habil.mat. (Doctor of Science in former USSR), Moscow State University, Russia, 1989

*Experience*

- Junior Researcher, Senior Researcher, Head of the Laboratory, professor, Lecturer, Institute of Mathematics and Computer Science, University of Latvia, 1965-1999
- Leading Researcher, Head of the Laboratory, Institute of Mathematics and Computer Science,University of Latvia, 2000 -
- Professor, University of Latvia, 1995 -

*Honours and Awards*

Corresponding Member, Latvian Academy of Sciences, 1995 -

*Professional Activities and Memberships*

- Vice-president, Latvian Mathematical Society
- Member of Board, Latvian Association of Scientists
- Member of the Editorial Board, journal
*Control and Cybernetics* - Member, Editorial Advisory Board, journal
*Mathematical Modelling and Analysis (The Baltic Journal on Mathematical Applications, Numerical Analysis and Differential Equations),*Lithuania, 1999- - Member, Latvian Council of Science, 2003 -

*Lectures*

U.Raitums. Investigations on Differential Equations and Optimal Control Problems in Latvia. Invited lecture. 22nd Nordic Congress of Mathematicians, June 4-7, Lahti, Finland, 1996

*Courses*

University of Latvia:

- Applied Analysis
- Optimization Methods

*Recent/Representative Publications*

- U.Raitums. Optimal Control Problems for Elliptic Equations,
*Riga: Zinatne Press*, 1989, 278 pp. (in Russian) - U.Raitums. On the mathematical aspects of optimal control problems for elliptic
equations. -
*Control and Cybernetics*, 1990, vol.19, 3-4, pp.249-261. - U.Raitums. The maximum principle and the convexification of optimal control problems. -
*Control and Cybernetics,*1994, vol.23, 4, pp.745-760. - U.Raitums. On the projections of multivalued maps. -
*J. Optimization Theory and Applications,*1997, vol.92, pp.637-664. - U.Raitums. On the weak closure of sets of feasible states for linear elliptic equations
in the scalar case. -
*SIAM J. on Control and Optimization*, 1999, vol. 37, No 4, pp. 1033-1047. - M.Miettinen, U.Raitums. On the strong closure of strains and stresses in linear
elasticity. -
*Proceedings of the Royal Society of Edinburgh,*1999, vol. 129A, pp. 987-1010. - U.Raitums. On the strong closure of sets of feasible states and cogradients for elliptic
equations. -
*Dynamics of Continuous, Discrete and Impulsive Systems*, 2000, vol. 7, No. 3, pp. 335-350. - M.Miettinen, U.Raitums. On C
^{1}-regularity of functions that define G-closure. -*Zeitschr. Analysis und ihre Anwendungen*, 2001, Bd. 20, pp. 203-214. - U.Raitums. On the local representation of G-closure. -
*Arch. Rational Mech. Anal.,*2001, vol.158, pp. 213-234. - U.Raitums. A global characteristic of G-limit operators for elliptic systems. –
*Mathematical Modelling and Analysis*, 2002, vol.7, pp.313-318. - U.Raitums. Relaxation of quasilinear elliptic systems via A-quasiconvex envelopes.
–
*ESAIM Control,Optimization and Calculus of Variations*, 2002, vol.7, pp.309-334. - U.Raitums. On the range of some sets of homogenized potential operators. –
*Nonlinear Analysis, Theory Methods and Applications*, 2005, vol.63, No 3, pp.550-564

*Research Projects*

- U.Raitums (Head of Project). Convergence of Solutions of Systems of Partial Differential
Equations.
*Latvian Council of Science*(1993-1996) - U.Raitums (Head of Project). Extremal Problems for Elliptic Systems.
*Latvian Council of Science*(1998-2000). - U.Raitums (Head of Project). Extensions of Families of Quasilinear Elliptic Equations.
*Latvian Council of Science*(2001 - 2004). - U.Raitums (Head of Project). Extremal Problems for Elliptic Systems.
*Latvian Council of Science*(2005 -).

*Last update 26.02.2007*