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Stochastic models seminar 20182019-20192020

Stochastic Models Seminar meets at  the department of Mathematics and Statistics at University of Helsinki. The topics touch on various  random phenomena and they depend on the interests of the participants. Often the seminar talks work as a 'reading seminar', where we study topics of general interest.  

The seminar meets  on Thursdays  14-16  in Exactum, room C124. It is run by prof. Kostya Izyurov (konstantin.izyurov@helsinki.fi), docent Ilkka Norros (ilkka.norros@elisanet.fi)  and prof.Eero Saksman (eero.saksman@helsinki.fi). Usually the talks are in English.



Forthcoming talks:

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Thursday 3.10.2019 C124 14-16 o'clock

Ilkka Norros:

On Eratosthenes sieve

Thursday 10.10.2019 C124 14-16 o'clock

Kamalakshya Mahatab:

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Thursday 7.11.2019 C124 14-16 o'clock

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This is the second part of series of talks which aim to give an introduction to basics of probabilistic number theory. The talks are aimed especially for students and almost nothing on number theory is assumed (and just basics of probability are needed).

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Previous talks:

Thursday 10.10.2019 C124 14-16 o'clock

Kamalakshya Mahatab:

Resonance method and Riemann zeta function

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Thursday 3.10.2019 C124 14-16 o'clock

Ilkka Norros:

On Eratosthenes sieve

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Thursday 4.4.2019 C124 14-16 o'clock

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On non-Gaussian multiplicative chaos




Talks in the past (2015-16)

Torstai/Thursday, 28.4. 2016  klo 16-18 C124
Ilkka Norros

A category of Markov processes


Torstai/Thursday, 7.4. 2016  klo 16-18 C124
Antti Kupiainen

Kolmogorov and Turbulence (KOLMOGOROV-sarjaa)


Torstai/Thursday, 17.3. 2016  klo 16-18 C124

Ilkka Norros

Stability and instability of file-sharing systems


Torstai/Thursday, 25.2. 2016  klo 16-18 C124

Julien Barral (Paris 13):

Projections of Mandelbrot measures and phase transitions

 

Torstai/Thursday, 11.2. 2016  klo 16-18 C124

Kari Eloranta
Kolmogorov and measurable dynamics: K and h  [KOLMOGOROV-sarjaa]
 

Torstai/Thursday, 4.2. 2016  klo 16-18 C124

Harri Hakula
Randomized Linear Algebra: Applications in Computational Mechanics, part II

Torstai/Thursday, 28.1. 2016  klo 16-18 C124

Harri Hakula
Randomized Linear Algebra: Applications in Computational Mechanics

Abstract: Data analysis has been a driving force behind recent advances in randomized linear algebra. The methods for computing partial matrix decompositions efficiently use random sampling to identify a subspace that captures most of the action of a matrix. In fact these methods rely on the concentration of measure phenomenon: the random input leads to very small variance on the quantities of interest.

In computational mechanics the interest lies in the smallest eigenvalues of generalized eigenvalue problems which is exactly opposite to data analysis where the focus is on largest singular values. Remarkably, for realistic classes of symmetric and positive definite systems the randomized algorithms perform better than the state-of-the-art general purpose eigensolvers. This result appears to be new.

Torstai/Thursday, 14.1. 2016  klo 16-18 C124

Teemu Roos
On Kolmogorov complexity  [KOLMOGOROV-sarjaa]

Torstai/Thursday, 3.12. 2015  klo 16-18 C124 

Dario Gasbarra  
 Asymptotic clustering for the eigenvalues of  a random matrix with isotropic Gaussian noise  

Torstai/Thursday, 19.11. 2015  klo 16-18 C124 

Paavo Salminen  
"Über die analytischen Methoden in der Wahrscheinlichkeitsrechnung" [KOLMOGOROV-sarjaa]

Torstai/Thursday, 12.11. 2015  klo 16-18 C124 

Ilkka Norros   
Real tree of fractional Brownian motion

Torstai/Thursday, 05.11. 2015  klo 16-18 C124

Janne Junnila
On the uniqueness of the multiplicative Gaussian chaos


Torstai/Thursday, 29.10. 2015  klo 16-18 C124

Jan von Plato
Kolmogorov's contributions to logic [KOLMOGOROV-sarjaa]

Torstai/Thursday, 22.10. 2015  klo 16-18 C124

Ehsan Azmoodeh
Optimal Berry-Esseen bounds on the Poisson space


Torstai/Thursday, 8.10. 2015  klo 16-18 C124

Eero Saksman
Divergent Fourier series
  [KOLMOGOROV-sarjaa]  

 


Torstai/Thursday, 1.10. 2015  klo 16-18 C124

Ilkka Norros   
Integrals on real trees

 Torstai/Thursday, 17.9. 2015  klo 16.30-18 C124  (HUOM muuttunut aika ja paikka!)
 Eero Saksman    
 Berestycki's approach to Gaussian chaos
 


 

Aiempia esitelmiä kaudella 2014-15

Torstai/Thursday, 28.5.2015  klo 15-17 C129

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Torstai/Thursday, 18.9.2014  klo 15-17 C129
Eero Saksman
The renewal theorem revisited: an analytical approach


Esitelmiä kaudella 2013-14

Torstai/Thursday, 8.5.2014  klo 15-17 C129
Janne Junnila
Introduction to Kahane's multiplicative chaos 

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