Málstofa í stærðfræði

[:is] Math colloquium Fyrirlesari: Yadollah Zare, Galatasaray University Titill: Center conditions: pull-back of differential equations. Ágrip: The space of polynomial differential equations of a fixed degree with a center singularity has many irreducible components. We prove that pull-back differential equations form an irreducible component of such a space. This method is inspired by Ilyashenko and Movasati’s […]

[:is] Math colloquium Fyrirlesari: María Óskarsdóttir, Háskólinn í Reykjavík Titill: Ranking nodes relative to influence with the Personalized PageRank algorithm applied to fraud detection and credit risk measurement Staðsetning: VRII-258Tími: Fimmtudagur 12.mars kl. 10:50 Ágrip: Various phenomena in both the physical and the digital world can be represented with networks, that is, entities that are

 [:is] Math colloquium Fyrirlesari: Sangmin Lee, Seoul National University Titill: Complete 1st post-Minkowskian potential from scattering amplitudes. Staðsetning: VHV-007 (Veröld)Tími: Mánudagur 24.Janúar kl.10:00 Ágrip: Building upon recent progress in applying amplitude techniques to perturbative general relativity, we propose a closed-form formula for the conservative Hamiltonian of a spinning binary system at the 1st post-Minkowskian order. It

[:is]Math colloquium Fyrirlesari: Ragnar Sigurðsson, University of Iceland Titill: Norms on complexifications of real vector spaces. Staðsetning: VRII-258 Tími: Fimmtudagur 6.febrúar kl. 10:50 Ágrip: The subject of this lecture is of general interest and it only requires knowledge of elementary linear algebra. The complexification V_C of a real vector space V is the smallest complex

[:is] Math colloquium Fyrirlesari: Lukas Schneiderbauer, Háskóli Íslands Titill: Non-Commutative Geometry: An introduction. Ágrip: This is my attempt to introduce non-commutative geometry to mathematicians. After putting forward the main ideas and main theorem(s), I will concentrate on the construction of simple examples in the context of fuzzy spaces (special cases of non-commutative geometries). In case

[:is]Math colloquium Fyrirlesari: Anna Helga Jónsdóttir og Benedikt Steinar Magnússon, Háskóli Íslands Titill 1: Student evaluations of teaching at the University of Iceland – analysis of data from 2013 – 2017 Ágrip 1: Student evaluations of teaching (ísl. kennslukönnun) is administrated at the end of each and every course at the University of Iceland with

[:is]Math colloquium Fyrirlesari: Sigurður Freyr Hafstein, Háskóli Íslands Titill: Lyapunov functions for stochastic differential equations and their computation Staðsetning: HB5 (Háskólabíó) Tími: Föstudag 15.nóvember kl. 11:40 Ágrip: Attractors and their basins of attraction in deterministic dynamical systems are most commonly studied using the Lyapunov stability theory.  Its centerpiece is the Lyapunov function, which is an

[:is]Math colloquium Fyrirlesari: Iman Mehrabinezhad, Háskóli Íslands Titill: A new method for computation and verification of contraction metrics Staðsetning: HB5 (Háskólabíó) Tími: Föstudag 8.nóvember kl. 11:40 Ágrip: The determination of exponentially stable equilibria and their basin of attraction for a dynamical system given by a general autonomous ordinary differential equation can be achieved by means

[:is]Math colloquium Fyrirlesari: Henning Arnór Úlfarsson, Háskólinn í Reykjavík Titill: Pattern avoidance in various domains Staðsetning: HB5 (Háskólabíó)Tími: Föstudag 25.oktúber kl. 11:40 Ágrip: When one searches the web for „pattern avoidance“ most of the results are about pattern avoiding permutations and their variants, such as colored, partial, multi-, affine, signed, and poset permutations. However there