Archive of the seminar of section Differential equations and mathematical physics
2019 – 2020
17.06.2020 г. from 14:00 in room 478, acad. Peter Popivanov and Prof., PhD Angela Slavova, THE NOBEL PRIZE IN PHYSICS FOR 2019; THE ABEL PRIZE IN MATHEMATICS FOR 2020.
11.03.2020 г. from 14:00 in room 478, acad. Peter Popivanov, In memory of Louis Nirenberg (1925 – 2020). An overview of some outstanding results of Prof. Nirenberg in the field of partial differential equations.
11.02.2020 г. from 14:00 in room 478, assist. prof., PhD Mirko Tarulli, DECAY AND SCATTERING IN ENERGY SPACE FOR THE SOLUTION OF GENERALIZED HARTREE EQUATION.
09.12.2019 г. from 14:00 in room 478, Prof. Nicola Visciglia (University of Pisa), GROWTH PHENOMENA FOR DISPERSIVE EQUATIONS.
30.10.2019 from 14:00 in room 478, acad. Peter Popivanov, Some Thoughts on Operators with Involute Characteristics.
26.09.2019 from 14:00 in room 478, acad. Peter Popivanov, THE NIRENBERG – TREVES CONDITION (Psi) IN THE THEORY OF PRINCIPAL-TYPE OPERATORS. HISTORICAL NOTES.
2018 – 2019
28.06.2019 г.from 11:00 in room 478, Col. Prof. Chhanda Samanta, Virginia Military Institute, USA A GENERALIZED MASS FORMULA FOR STRANGE AND NON-STRANGE NUCLEI.
28.06.2019 from 12:00 in room 478, Col. Prof. Dimple Chalishajar, Virginia Military Institute, USA EXACT AND TRAJECTORY CONTROLLABILITY OF NONLINEAR AND FRACTIONAL ORDER SYSTEMS: A THEORETICAL AND AN ANALYTICAL APPROACH.
19.06.2019 from 14:00 in room 478, assoc. prof., PhD Dimitar Mladenov, YANG-MILLS THEORY AND INTEGRABILITY.
22.05.2019 from 14:00 in room 478, acad. Peter Popivanov, (IN)SOLVABILITY OF QUASI-ELLIPTIC SYSTEMS WITH CRITICAL SOBOLEV NON-LINEARITY.
15.05.2019 from 14:00 in room 478, acad. Peter Popivanov, The Research of Karen Ulenbek, ABel Prize Winner for 2019, in Charmonic Maps in the 2D Case and Their Irregularities.
17.04.2019 from 14:00 in room 478, prof., PhD Stoycho Yazadzhiev, Scalarized Black Holes with Gauss-Bonnet Interaction: Structure, Stability and Quasi-normal Modes.
06.03.2019 from 14:00 in room 478, prof., PhD Nikolay Kutev, Monge–Ampère equation and its applications (BASED ON THE WORKS OF THE 2018 FIELDS MEDALIST ALESSIO FIGALLI).
06.02.2019 from 14:00 in room 478, acad. Peter Popivanov, EXACT SOLUTIONS OF A NEW EVOLUTION EQUATION.
21.11.2018 from 14:00 in room 478, acad. Peter Popivanov, Sub-riemannian Geometry for Second Order Subelliptic Operators.
24.10.2018 from 14:00 in room 478, acad. Peter Popivanov, Egorov and the Theory of Pseudo-Differential Operators, In Memoriam.
10.10.2018 from 14:00 in room 478, prof. Alexander Smirnov, Saint Petersburg State University of Aerospace Instrumentation, ELLIPTIC SOLUTIONS OF EQUATIONS FROM AKNS HIERARCHY.
03.10.2018 from 14:00 in room 478, acad. Peter Popivanov, BONY MAXIMUM PRINCIPLE AND ITS GENERALIZATIONS FOR DEGENERATE SEMILINEAR ELLIPTIC EQUATIONS.
2017 – 2018
06.06.2018 from 14:00 in room 478, acad. Peter Popivanov, НЯКОЛКО НОВИ РЕЗУЛТАТА ЗА ЧАСТНИ ДИФЕРЕНЦИАЛНИ УРАВНЕНИЯ.
25.04.2018 from 14:00 in room 478, assoc. prof. Bogdana Georgieva, THE GENERALIZED VARIATION PRINCIPLE OF HERGLOTZ AND ITS APPLICATIONS IN MATHEMATICAL PHYSICS.
21.03.2018 from 14:00 in room 478, Prof., PhD Stoycho Yazadzhiev, THEOREM FOR THE POSITIVENESS OF GRAVITATIONAL ENERGY AND ITS APPLICATION IN THE THEOREM FOR THE UNIQUENESS OF STATIC BLACK HOLES.
7.03.2018 from 14:00 in room 478, assist. prof., PhD Alexander Stefanov, SOME UNSOLVED PROBLEMS IN MODERN MATHEMATICAL PHYSICS.
21.02.2018 from 14:00 in room 478, assist. prof., PhD Alexander Stefanov, SOME UNSOLVED PROBLEMS IN MODERN MATHEMATICAL PHYSICS.
07.02.2018 from 14:00 in room 478, acad. Peter Popivanov, SEVERAL NOTES ABOUT THE PERTURBED MULTIDIMENSIONAL QUANTUM HARMONIC OSCILLATOR AND A GENERALIZATION OF THE ELLIPTIC LIOUVILLE EQUATION.
15.11.2017 from 14:00 in room 478, prof., PhD Stoycho Yazadzhiev, GENERAL THEORY OF RELATIVITY AND GRAVITATIONAL WAVES.
18.10.2017 from 14:00 in room 478, ас. д-р Alexander Stefanov, UNRESOLVED PROBLEMS IN THE GENERAL THEORY OF RELATIVITY.
2016 – 2017
14.06.2017 at 14:00 in room 478 of IMI-BAS, Vasil Tinchev Ph.D., „SHADOWS OF SELF GRAVITATING COMPACT OBJECTS“
17.05.2017 at 14:00 in room 478 of IMI-BAS, Prof. Tsvyatko Rangelov, „LOWER ESTIMATE FOR THE FIRST EIGENVALUE OF R-LAPLACIAN“ (A. Fabrikant, N. Kutev, Ts. Rangelov)
19.04.2017 at 14:00 in room 478 of IMI-BAS, Dragomir Dragnev, Ph.D., „СИМПЛЕКSYMPLECTIC CAPACITIES AND SOME APPLICATIONS, PART 2“
05.04.2017 at 14:00 in room 478 of IMI-BAS, Mirko Tarulli, Ph.D., „MORAWETZ AND INTERACTION MORAWETZ IDENTITIES FOR SYSTEMS OF N-DEFOCUSING WEAKLY COUPLED NLS EQUATIONS ON Rd × Mk IN LOW SPACE DIMENSIONS“
15.03.2017 at 14:00 in room 478 of IMI-BAS, Assoc. Prof. Peter Rashkov, „MATHEMATICAL MODEL OF THE CELL POLARITY SYSTEM OF THE SOIL BACTERIA MYXOCOCCUS XANTHUS“
01.03.2017 at 14:00 in room 478 of IMI-BAS, Acad. Peter Popivanov, „NEW RESULTS FOR LINEAR OPERATORS OVER COMPACT MANIFOLDS, INCLUDING TORUSES “
22.02.2017 at 14:00 in room 478 of IMI-BAS, Galina Bobeva, „LOCAL ACTIVITY METHOD FOR REACTION-DIFFUSION EQUATIONS“
15.02.2017 at 14:00 in room 478 of IMI-BAS, Dragomir Dragnev, Ph.D., „SYMPLECTIC CAPACITIES AND SOME APPLICATIONS“
08.02.2017 at 14:00 in room 478 of IMI-BAS, Assoc. Prof. Filip Filipov, „STRUCTURAL METHODS FOR SOLVING SOME WAVE EQUATION BOUNDARY PROBLEMS“
25.01.2017 at 14:00 in room 478 of IMI-BAS, Acad. Peter Popivanov, „TWO PROBLEMS OF PDEs“
14.12.2016 from 13:00 to 17:00 h. in room 478 of IMI-BAS, DIFFERENTIAL EQUATIONS AND MATHEMATICAL PHYSICS DEPARTMENT ANNUAL SEMINAR 2016
16.11.2016 at 14:00 in room 478 of IMI-BAS, Alexander Stefanov, Ph.D., „GENERAL RELATIVITY THEORY AND GRAVITATIONAL WAVES“
26.10.2016 at 14:00 in room 478 of IMI-BAS, Prof. Vladimir Gerdzhikov, „ON THE REDUCTIONS OF MULTICOMPONENT NONLINEAR SCHRÖDINGER EQUATIONS“
19.10.2016 – 21.10.2016 , from 14:00 to 15:00 h. in room 478 of IMI-BAS, Dr. Monica Marras, University of Cagliari, Department of Mathematics and Computer Science, PHD Course on „Qualitative Properties of Solutions to Nonlinear Parabolic Boundary Value Problems“
28.09.2016 at 14:00 in room 478 of IMI-BAS, Acad. Peter Popivanov, „THE NASH-MOSER THEOREM“
2015 – 2016
22.06.2016 at 14:00 in room 478 of IMI-BAS, preliminary defense of the following thesis of PhD student Todor Petkov Mitev, with mentor Prof. Georgi Popov, „NORMAL FORMS AND SPECTRAL ASYMPTOTICS“
15.06.2016 at 14:00 in room 478 of IMI-BAS, Prof. D.Sc. Venelin Zhivkov, „A NUMERICAL EXAMPLE FOR APPLICATION OF CONTINUOUS WAVELET TRANSFORM“
08.06.2016 at 14:00 in room 478 of IMI-BAS, Assoc. Prof. Georgi Boyadzhiev, Ph.D., „PRINCIPLE OF COMPARISON FOR QUASI-LINEAR ELIPTICAL AND PARABOLIC SYSTEMS AND APPLICATIONS. 3D MODELS OF EARTH CRUST AND UPPER MANTLE BY BI-CHARACTERISTICS.“
20.04.2016 at 14:00 in room 478 of IMI-BAS, Todor Mitev from Rouse University, „NORMAL FORMS IN GEVRAY CLASSES AND SPECIAL ASYMPTOTICS“
13.04.2016 at 14:00 in room 478 of IMI-BAS, Yuri Dimitrov from Rouse University, „APPROXIMATIONS OF FRACTIONAL INTEGRALS AND FRACTIONAL DERIVATIVES. NUMERICAL METHODS FOR FRACTIONAL DIFFERENTIAL EQUATIONS“
23.03.2016 from 14:30 in room 478, Prof. Vladimir Gerdzhikov, „ON THE LOCAL AND NON-LOCAL MODELS OF THE KULISH-SKLYANIN TYPE“
16.03.2016 at 14:00 in room 478 of IMI-BAS, Sen. Assist. Prof. Tihomir Valchev, „NON-LINEAR PDE IN CLASSICAL DIFFERENTIAL GEOMETRY“
24.02.2016 at 14:00 in room 478 of IMI-BAS, Acad. Peter Popivanov, „EXPLOSIVE SOLUTIONS OF NON-LINEAR PARTIAL DIFFERENTIAL EQUATIONS IN GEOMETRY“
17.02.2016 at 14:00 in room 478 of IMI-BAS, Prof. Vladimir Gerdzhikov: „ON THE SOLITON SOLUTIONS OF EQUATIONS OF TITEICA TYPE“
10.02.2016 at 14:00 in room 478 of IMI-BAS, Assist. Prof. Alexander Stefanov (Institute of Mathematics and Informatics) and Assist. Prof. Stanislav Varbev (Institute of Solid State Physics): „NON-LINEAR DYNAMIC SYSTEMS WITH INFINITE -DIMENSIONAL LIE ALGEBRAS“
13.01.2016 from 13:00 in room 478, Acad. Peter Popivanov: „VLASOV EQUATION, LANDAU DAMPING, ASYMPTOTIC BEHAVIOR OF THE SOLUTION FOR INITIAL PROFILE VERY CLOSE TO THE ANALYTIC ONE THROUGH THE EYES OF CEDRIC VILLANI (FIELDS MEDAL WINNER IN 2010)“
16.12.2015 from 10:00 to 17:00 h. in room 478 of IMI-BAS, Annual Reporting Seminar of Differential Equation and Mathematical Physics Department. Dedicated to the memory of Prof. Todor Gramchev (1956-2015).
02.12.2015 at 14:00 in room 478 of IMI-BAS, G. Botadjiev: „The Ito Integral and Its Applications to Economics“; G. Chobanov: „Stohastic Differential Equations“
28.10.2015 at 14:00 in room 478 of IMI-BAS, Dobromir Kralchev: „PROOF OF THE IRRATIONALITY OF ZETA(3)“
21.10.2015 at 14:00 in room 478 of IMI-BAS, Alexander Stefanov: „POSITIVE MAPPINGS BETWEEN С*-ALGEBRAS AND APPLICATIONS IN QUANTUM INFORMATION“
07.10.2015 at 14:00 in room 478 of IMI-BAS, Prof. Nikolay Kutev (co-authors: N. Kolkovska and M. Dimova): „ORBITAL STABILITY OF SOLITONS ON PROPAGATION OF NERVE IMPULSES IN BIOMEMBRANES“
23.09.2015 at 14:00 in room 478 of IMI-BAS, Acad. Peter Popivanov: PSEUDO-DIFFERENTIAL OPERATORS OF SUBPRINCIPAL TYPE: OLD AND NEW SOLVABILITY RESULTS