**Differential Equations and Numerical Analysis**Heads of the seminar - Prof. Dr. Habil.

Mifodijus SAPAGOVAS and Prof. Dr. Habil. Konstantinas PILECKAS

Topics: Theory of differential equations, Navier-Stokes equations, problems with nonlinear conditions, numerical analysis of nonlinear differential equations, and applications of differential equations.

Periodicity: on the average twice a month, on Wednesdays, at 11 a.m.

Contingent of speakers and the audience: researchers of the Differential Equations Department and Numerical Analysis Department of IMI, doctoral students; nearly half of the speakers are invited from other organizations.

Seminar of the Informatics Methodology Department

Mathematical logic and its applications

Topics: classical and non-classical mathematical logic; application of logic in informatics and artificial intelligence.

Periodicity: Once a month.

Contingent of speakers and the audience: researchers of Mathematical Logics Department of IMI, doctoral students, and speakers from various universities of Lithuania.

Seminar of Stochastic Processes, Probability Theory and Statistics Departments at Institute of Mathematics and Informatics, Econometric Analysis, Mathematical Analysis, and Mathematical Computer Science Departments at Faculty of Mathematics and Informatics of Vilnius University "Mathematics and its applications"

Heads of the seminar:

prof. habil.dr. Vygantas PAULAUSKAS

prof. habil.dr. Mindaugas BLOZNELIS

Main themes: problems of probability theory and mathematical statistics, functional analysis and its applications.

Periodicity: weakly, on Wednesdays at 9.15 a.m. Vilnius, Akademijos str. 4, room 203.

Contingent of speakers and listeners: researchers and doctoral students, working on the problems of probability theory, mathematical statistics, functional analysis and their applications.

Nonlinear Analysis: Modelling and Control

Head of the seminar - prof. habil.dr. Feliksas IVANAUSKAS

Scientific secretary - doc. dr. Algimantas JUOZAPAVIČIUS

Topics: An academic interdisciplinary seminar meant for research, modelling, control, and application of nonlinear processes and phenomena in mathematics, physics, chemistry, biochemistry, biology, informatics, and economics.

Periodicity: on the average twice a month, (on Wednesdays, at 2 p.m.) at the Institute of Mathematics and Informatics (Akademijos str. 4) or at the Faculty of Mathematics and Informatics of Vilnius University (Naugarduko str. 24); sometimes in other institutions, too.

Contingent of speakers and the audience: researchers of the Lithuanian scientific institutes and higher schools; sometimes there are invited speakers from abroad.

**Seminar on Engineering Problems of Systems**

Topics: Engineering problems of software and other systems.

Periodicity: weakly, Akademijos str. 4, room 203 or 107.