Alexandre Sukhov: Attaching complex discs to real tori and applications
Complex analysis seminar
2. 12. 2010
Petar Pavešić, Modeli homotopskih kategorij, 2.del
Ponedeljek 6.12. 2010, od 12h do 14h, soba 3.06, Jadranska 21
Topology seminar
2. 12. 2010
Sergei Lando: Integrable hierarchies of PDEs in mathematical physics and combinatorics of the symmetric groups
Ponedeljek 6.12.2010, od 10h do 12h, soba 3.06 na Jadranski 21
Geometry seminar
30. 11. 2010
Ta teden seminar odpade!
Graph theory and algorithms seminar
30. 11. 2010
Milena Strnad: Profesor Ivan Štalec – ob stoletnici rojstva
Ponedeljek, 6. 12. 2010 od 14. do 16. ure v Plemljevem seminarju, Jadranska 19.
Seminar for history of mathematical sciences
30. 11. 2010
Maria Del Rio Francos (FMF UL, Slovenija): Medial symmetry type graphs of edege-transitive Maps
Četrtek, 2. 12. 2010, od 17:15 do 18:15, učilnica 014, Pedagoška fakulteta Univerze v Ljubljani
Seminar for group theory and combinatorics
30. 11. 2010
Vito Vitrih: Cikloidne krivulje s pitagorejskim hodografom
Sreda 1. 12. 2010 od 10h do 11h, soba 3.06 na Jadranski 21
Numerical analysis seminar
29. 11. 2010
Andrej Bauer: Simplicialne množice
Torek, 30.11.2010, od 12h do 14h, Plemljev seminar, Jadranska 19
Mathematics and theoretical computing seminar
29. 11. 2010
Seminar za diskretno matematiko ta teden odpade!
Ta teden (30. 11. 2010) seminar odpade.
Discrete mathematics seminar
29. 11. 2010
George Papamikos: Introduction to Lie group analysis of differential equations
George Papamikos,
Center za uporabno matematiko in teoretično fiziko, Univerza v Mariboru
Some group theoretic methods for integrating differential equations due to Sophus Lie and Emmy Noether are introduced and in the end applied to a class of time-dependent nonlinear oscillators. In particular, in the first part of this talk some basic concepts will be briefly introduced; namely: continuous groups of transformations, their infinitesimal generators and their invariants. Moreover, the concept of a symmetry of a differential equation will be discussed, as well as simple methods of finding those symmetries (using Lie's algorithm) and methods of using them (reducing the order of the differential equation). In the second part, Lie's formalism will applied to Lagrangian and Hamiltonian mechanics. Two versions of the theorem of Emmy Noether will discussed and connections with constants of motions will be established. In the third part, Lie's method will be applied to a class of time-dependent, nonlinear oscillators with cubic nonlinearity. A classification of different cases with respect to their Lie point symmetries will be presented and the corresponding reductions of the order of each equation will be given. In some of these cases a second reduction, i.e. integration, is possible due to the special character of the symmetry, namely to preserve also the action integral (that is to be of Noether type). In such cases explicit exact analytic solutions of the underlying systems are given.
Mathematical physics seminar
28. 11. 2010
Prof. dr. Finnur Larusson: Homotopy theory in complex geometry
Četrtek, 2. 12. 2010, ob 18.15 v predavalnici 2.02 na Jadranski 21.
Mathematics colloquium
26. 11. 2010
Petar Pavešić, Modeli homotopskih kategorij
Ponedeljek 29.11. 2010, od 12h do 14h, soba 3.06, Jadranska 21
Topology seminar
26. 11. 2010
Jure Kališnik: Struktura Hopfovih algeber
Ponedeljek 29.11.2010, od 10h do 12h, soba 3.06 na Jadranski 21
Geometry seminar
25. 11. 2010
Ronan Quarez: On the real zeros of positive semi-definite biquadratic forms
We recall some old constructions of positive semi-definite biquadratic
forms which are not sums of squares and we give some new families of
examples. We show that if a positive semi-definite biquadratic form F in (3, 3)
variables has a finite number but at least 7 real zeros, then it is not
a sum of squares.
Functional analysis and algebra seminar
25. 11. 2010
Ganna Kudryavtseva: O prokončnih prostorih in Stoneovi dualnosti.
Algebra seminar
25. 11. 2010
Aleksander Simonič: Baselski problem
Ponedeljek, 29. 11. 2010, od 14h do 16h, Plemljev seminar, Jadranska 19
Seminar for history of mathematical sciences
23. 11. 2010
Davorin Lešnik: Konstrukcije realnih števil
Torek, 23.11.2010, od 12h do 14h v Plemljevem seminarju, Jadranska 19
Mathematics and theoretical computing seminar
23. 11. 2010
Gasper Fijavž: Cliques in embedded graphs, part II
Četrtek 25. 11. 2010 ob 12:15 v predavalnici 3.05 na Jadranski 21
Graph theory and algorithms seminar
22. 11. 2010
Ferdinando Cicalese (Universita degli Studi di Salerno, Italija): Searching in Partially Ordered Structures: Average-case Minimization
Četrtek, 25. 11. 2010, od 17:15 do 18:15, učilnica 014, Pedagoška fakulteta Univerze v Ljubljani
Seminar for group theory and combinatorics
22. 11. 2010
Selena Praprotnik: Minimizacija energije pri vzponu na goro
Sreda 24. 11. 2010 od 10h do 11h, soba 3.06 na Jadranski 21
Numerical analysis seminar
21. 11. 2010
