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Lectures, seminars and dissertations

* Dates within the next 7 days are marked by a star.

Alessandro Filippo
Walk-induced strategies for updating Katz centrality and applications to Network Robustness
* Today * Wednesday 17 September 2025,   14:00,   M1 (M232)
Numerical Analysis seminar

Dissertation
Okko Makkonen
PhD Defence: Algebraic methods for secure coded computing
Friday 10 October 2025,   12:00,   M1 (M232)
Further information
ANTA Seminar / Hollanti et al.

Prof. Gretchen Matthews (Virginia Tech)
TBA
Tuesday 14 October 2025,   15:15,   M1 (M232)
TBA

Prof. Gretchen Matthews (Virginia Tech)
Colloquium talk (TBA)
Tuesday 14 October 2025,   15:15,   M1 (M232)
Further information

Prof. Christian Webb (University of Helsinki)
TBA
Tuesday 21 October 2025,   10:15,   M3 (M234)

Dr. Augustin Lafay (Aalto University)
TBA
Tuesday 28 October 2025,   10:15,   M3 (M234)

Prof. Gerardo Barrera (Instituto Superior Técnico Lisboa)
Asymptotic Behavior of the Condition Number of Random Circulant Matrices
Wednesday 29 October 2025,   14:15,   M2 (M233)
We analyze the asymptotic distribution of the extremal singular values of random circulant matrices generated by sequences of independent and identically distributed random variables satisfying the Lyapunov condition. Under an appropriate normalization, we establish that, as the matrix dimension tends to infinity, the joint distribution of the largest and smallest singular values converges in distribution to the independent product of Rayleigh and Gumbel laws. This result directly implies that a suitably normalized condition number of such matrices converges in distribution to a Fréchet law in the large-dimensional limit. The condition number serves as a quantitative measure of the sensitivity of linear systems to infinitesimal perturbations of the input. The proof relies on the classical coupling method of Einmahl–Komlós–Major–Tusnády to achieve precise probabilistic control over the spectral extremes. This is a joint contribution with Paulo Manrique (Extremes, 2022).
Stochastics Seminar

Prof. Tuomas Hytönen (Aalto University)
TBA
Tuesday 09 December 2025,   15:15,   M1 (M232)
TBA

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