Kalendarium
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–12.00
Sannolikhet, statistik och kombinatorik: Limit of the Right-Most Position of a Modified Branching Random Wa
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–15.00
Presentation av examensarbete C i matematik: Livförsäkringsmatematik
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–16.00
Presentation av examensarbete C i matematik: Elliptiska kurvor och kryptografi
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–12.00
PDE och tillämpningar: Kinetic theory for the low-density Lorentz gas
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–12.00
Geometri och topologi: Operads
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–12.00
PDE och tillämpningar: Degenerate Equations and Boundary Conditions in Finance
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–16.00
Geometri och topologi: DGAs CoDGAs and A-infinity algebras
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–15.00
CAPA: Method for estimating hidden structures determined by unidentifiable mathematical models and time series data based on the Groebner basis on differential algebra
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–11.15
DNA-semainariet: Zero-one laws for uniform shrinking target systems
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–12.00
PDE och tillämpningar: Central Limit Theorem for linear statistics for orthogonal polynomial ensembles on the unit circle
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–15.00
Geometri och topologi: Legendrian surgery formula and Chekanov-Eliashberg algebras for singular Legendrian
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–15.00
Stokastisk analys och tillämpningar: Optimal switching problems: solution techniques and applications
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–12.00
Disputation: 7D supersymmetric Yang-Mills theory on toric and hypertoric manifolds
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–12.00
PDE och tillämpningar: Homogenisation with error estimates of attractors for damped semi-linear anisotropic wave equations
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–16.00
Stokastisk analys och tillämpningar: Optimal dividends with partial information and stopping of a degenerate reflecting diffusion
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–17.00
CAPA: Beltrami fields with hyperbolic periodic orbits enclosed by knotted invariant tori
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–12.00
PDE och tillämpningar: Boundedness of Schrödinger Integral Operators in Sobolev Spaces
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–10.00
Stokastisk analys och tillämpningar: Playing stopping games against a ghost
Abstract: We study a class of optimal stopping games (Dynkin games) with uncertainty about the existence of competitors. We show that there exists a Nash equilibrium in randomized stopping times which is described explicitly in terms of the corresponding one-player game.
This is joint work with Tiziano De Angelis. -
–15.00
Geometri och topologi: Legendrian surgery formula and Chekanov-Eliashberg algebras for singular Legendrian, part II
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–11.15
Sannolikhet, statistik och kombinatorik: Strictly weak consensus in the uniform compass model on Z
Abstract: We investigate a model for opinion dynamics, in which individuals are modeled by vertices of a graph. As time progresses, neighboring individuals interact, which results in a realignment of their opinions closer towards each other and as a result triggers formation of a consensus. Our main focus is on strong consensus (i.e. global agreement of all individuals) versus weak consensus (i.e.
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–16.15
CAPA: Global instability for `complete' families of perturbations with two or three independent harmonics
We prove that for any non-trivial perturbation depending
on any two independent harmonics of a pendulum and a rotor
there is global instability, also called Arnold diffusion.
The proof is based on the geometrical method and relies on
the concrete computation of several scattering maps.
A complete description of the different kinds of scattering maps
taking place as well as the existence of piecewi -
–11.15
PDE och tillämpningar: Wave equations close to Cauchy and event horizons and applications in general relativity
Abstract: The fundamental equations in Einstein's theory of general relativity are wave equations on curved spaces. The behavior of waves becomes particularly interesting close to event horizons of black holes or close to so called Cauchy horizons. I will explain new results on this topic and relate them to the following classical open questions:
Is there a general mathematical obstruction to time -
–11.00
Stokastisk analys och tillämpningar: Moment constrained optimal dividends: precommitment & consistent planning
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–14.15
DNA-semainariet: Diophantine approximation in number fields
Abstract: Classical Diophantine approximation, roughly speaking, seeks to quantify the statement "the rationals are dense in the reals".
In this seminar, I will explain how analogues of results from this area can be proven in number fields: as an example, I will discuss a classical result, namely Gallagher's zero-one law, give a statement of this in number fields, and sketch a proof, outlining th -
–11.15
Simple homotopy type of the Hamiltonian Floer complex
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PDE och tillämpningar: Convergence and localization of Schrödinger means.
We shall study localization of Schrödinger means and convergence of sequences of Schrödinger means. We shall also replace sequences by uncountable sets, for instance Cantor sets. The convergence results have been obtained in joint work with Jan-Olov Strömberg.
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–15.15
Geometri och topologi: Legendrian surgery formula and Chekanov-Eliashberg algebras for singular Legendrian III
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–11.15
Sannolikhet, statistik och kombinatorik: A path wise approach to branching processes with pairwise interactions
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–14.15
CAPA: A computer-assisted proof for H(4)≥24 in Hilbert’s sixteenth problem
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–11.15
PDE och tillämpningar: Mathematical methods for uncertainty and exclusion in quantum mechanics
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–11.15
Sannolikhet, statistik och kombinatorik: Diffusion interpolation in auto encoders
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–15.00
Selected Topics in Continuum Percolation: Phase Transitions, Cover Times and Random Fractals
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–17.15
Presentation av examensarbete E i matematik: What is the link between temperature, carbon dioxide and methane? A multivariate Granger causality analysis based on ice core data from Dome C in Antarctica.
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Kollokvium (Kathryn Hess): Topological adventures in neuroscience
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–15.00
Docentföreläsning (Thomas Kragh)
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–16.30
Kollokvium (Irina Mitrea): The Art of Integrating by Parts
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–16.30
Kollokvium (Fredrik Viklund):