Malga Seminar
You can find below the dates and abstracts for the next Malga Seminar, as well as an archive of past talks (from 2025). An archive of past talks from 2009 can be found here. For any questions about the seminar, please do not hesitate to contact the organisers: Lidia Angeleri Hügel , Alessio Cipriani and Jorge Vitória .
🗓8 Oct 2025 - Padova, Torre Archimede, 2BC30 and online
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15:45 UTC
Søren Gammelgaard
Quiver schemes and sheaves on noncommutative projective partial resolutions
Consider a finite subgroup \(G\) of \(SL_2(\mathbb{C})\). Then the singular variety \(\mathbb{C}^2/G\) is a Kleinian singularity, also known as an ADE singularity or a canonical surface singularity. Associated to \(G\), we can construct a particular quiver, the McKay quiver. We shall use this quiver to construct a class of schemes, the Nakajima quiver schemes, and indicate how these provide …
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17:15 UTC
Jan Šťovíček
Generation time for perfect complexes and weak global dimension
We prove that for any ring \(A\) (commutative or not), the number of extensions needed to generate the category of perfect complexes from the ring itself equals the weak global dimensions of \(A\). Using a recent technique of Neeman, the result also globalizes to all quasi-compact separated schemes, characterizing locally finite weak global dimension in terms of strong generation of the perfect …
Upcoming seminars
- 22 Oct 2025, Sofia Franchini, Juan Omar Gomez, Verona.
- 20 Nov 2025, Giulia Cavicchioni, Alberto Tonolo, Padova.
- 3 Dec 2025, Ángel Del Río, Lleonard Rubio y Degrassi, Padova.
- 14 Jan 2026, Parth Shimpi, Verona.
Previous seminars
- 19 May 2025. David Murphy, Admissible dissections of surfaces and piano algebras.
- 19 May 2025. Georgios Dalezios, On a class of quasi-hereditary algebras arising from Reedy categories.
- 30 Apr 2025. Jerzy Weyman, ADE correspondence for finite free resolutions.
- 30 Apr 2025. Valentina Grazian, Exotic fusion systems.
- 19 Mar 2025. Mima Stanojkovski, Stable lattices in Bruhat-Tits buildings: algebra, geometry, and combinatorics.
- 19 Mar 2025. Andreas Hochenegger, Cohomology of toric vector bundles via Weil decorations.
- 5 Feb 2025. Andriy Regeta, A characterization of rationality and Borel subgroups in the Cremona group.
- 5 Feb 2025. Francesco Sala, Yangians and cohomological Hall algebras.
- 22 Jan 2025. Willem De Graaf, Computational problems for algebraic groups.
- 22 Jan 2025. Felix Küng, Detecting non-Fourier-Mukai functors.