Dear colleagues,

we are happy to announce the following talk

*Claudio Durastanti* (Univ. Roma La Sapienza) *Aliasing effects for random fields over the sphere*

*Abstract:** This talk explores aliasing effects that arise during the reconstruction from discrete samples of spin spherical random fields defined on the sphere, with a brief discussion of the scalar case. With a fixed sampling method for obtaining field samples, we identify the location and intensity of aliases in the frequency domain for the harmonic coefficients in the Fourier decomposition of the random field and assess the impact of aliasing errors on the angular power spectrum. Finally, we show that band-limited spin random fields can be free from aliasing if a sufficiently large number of samples is taken.*

Date and time: Tuesday* February 4, 14:00-15:00 (Rome time zone)* Place: *Aula 3014, Dip. Matematica e Applicazioni, Univ. Milano-Bicocca, Via R. Cozzi 55, Milano*

Webex meeting link: *https://unimib.webex.com/unimib-it/j.php?MTID=m043184e9df27521cc217c37e64d56... https://unimib.webex.com/unimib-it/j.php?MTID=m043184e9df27521cc217c37e64d56b9e*

Meeting number: 2741 907 8097

Password: wSZNHJFa923

*This talk is part of the* *(PMS)^2: Pavia-Milano Seminar series on Probability and Mathematical Statistics* *organized jointly by the universities Milano-Bicocca, Pavia and Milano-Politecnico.*

-- Nicola Turchi

Dipartimento di Matematica e Applicazioni Università degli Studi di Milano-Bicocca