Brazilian Algebraic Geometry Seminar

no Zoom (e na vida real)

Organizadores: Carolina Araujo e Eduardo Esteves (Impa), Marco Pacini (UFF), Maurício Corrêa e Renato Vidal Martins (UFMG), Marcos Jardim (UNICAMP)

Cronograma (em progresso), ver também researchseminars.org:

• 8.4.2020 Ethan Cotterill (UFF), "Rational curves with hyperelliptic singularities". Slides

• 15.4.2020 Gaia Comaschi (UNICAMP), "GIT stability of linear systems of skew-symmetric forms". Slides

• 22.4.2020 Lucas das Dores (Impa), "Schemes of rational curves on Del Pezzo surfaces". Slides Video

• 29.4.2020 Giosuè Muratore (UFMG), "A recursive formula for osculating curves". Slides Video

• 6.5.2020 This talk is cancelled and will be programmed for a later date.

• 13.5.2020 Ugo Bruzzo (SISSA e UFPB), "About the McKay correspondence in 3 dimensions". Abstract Slides Video

• 20.5.2020 Charles Almeida (UFMG), "The geography of moduli spaces of torsion free sheaves". Abstract Slides Video

• 27.5.2020 Jorge Vitório Pereira (Impa), "Miyaoka's algebraicity criterion and variations". Abstract Slides Video

• 03.6.2020 Tiago Fonseca (Oxford), "From transcendental numbers to higher Ramanujan foliations". Abstract Slides Video

• 10.6.2020 Mini-conferência em memória de Fernando Torres, com palestras de Herivelto Borges (USP-São Carlos), Cícero Carvalho (Universidade Federal de Uberlândia), Luciane Quoos (UFRJ) e Saeed Tafazolian (UNICAMP), e depoimentos de alunos e colaboradores. Abstracts slides 1 slides 2 slides 3 slides 4 Palestras (vídeo) Depoimento de Arnaldo Garcia Depoimento de alunos de Fernando Torres 

• 17.6.2020 Genival da Silva Jr. (Imperial College), "Surfaces with exceptional monodromy". Abstract Slides

• 24.6.2020 Cecília Salgado (UFRJ), "Mordell--Weil rank jumps and the Hilbert property". Abstract Slides Video

• 1.7.2020 André Contiero (UFMG), "Curves and Weierstrass points". Abstract Slides Video 

• 8.7.2020 Rick Rischter (Universidade Federal de Itajubá), "Secant defectiveness of toric varieties". Abstract Slides Video 

• 15.7.2020 Maral Mostafazadehfard (UFRJ), "Divisor class group of Hankel determinantal rings". Abstract Slides (pdf) Slides (key) Video 

• 22.7.2020 Amar Henni (UFSC), "On the fixed locus of framed instanton sheaves on P^3". Abstract Slides Video 

• 29.7.2020 Rodrigo Barbosa (Stony Brook), "String Dualities, Higgs Bundles and G_2 Geometry". Abstract Slides Video 

• 5.8.2020 Roberto Villaflor (Impa), "Constructing algebraic cycles on hypersurfaces: an explicit approach to the Hodge conjecture". Abstract Slides Video 

• 12.8.2020 Rodrigo Gondim (UFRPE), "Waring problems and the Lefschetz properties". Abstract Slides Video 

• 19.8.2020 Alex Abreu (UFF), "A geometric interpretation for characters of Iwahori-Hecke algebras". Abstract Slides Video 

• 26.8.2020 Young BRAG I, uma mini-conferência promovendo jovens talentos brasileiros, com Nuno Cardoso (U. Miami) e Aline Zanardini (U. Penn). Abstract Nuno Slides Nuno  Abstract Aline Slides Aline Video 

• 2.9.2020 Eduardo Esteves (Impa), "Degenerations of line bundles along curves".  Abstract Slides Video 

• 9.9.2020 Alan Muniz (UFF), "On moduli spaces of rank two logarithmic connections over an elliptic curve". Abstract Slides Video

• 16.9.2020 Daniele Faenzi (U. Bourgogne), "Stability of logarithmic tangents". Abstract Slides Video 

• 23.9.2020 Alessia Mandini (UFF),  "Quasi-parabolic Higgs bundles and null hyperpolygon spaces".  Abstract 

• 30.9.2020 Young BRAG II, uma mini-conferência promovendo jovens talentos brasileiros, com Cesar Hilario Poma (Impa) e Sally Andria (UFF). Abstract Cesar Abstract Sally Slides Cesar Slides Sally Video 

• 7.10.2020 Damiano Testa (U. Warwick), "Contact in algebraic and tropical geometry". Abstract Slides Video 

• 14.10.2020 Marcos Jardim  (UNICAMP), "Classification of codimension one distributions of degree two on the projective space". Abstract Slides Video

• 21.10.2020 Ageu Barbosa (UFPB), "On (h, s)-tangential weak defectiveness and identifiability of some projective varieties". Abstract Slides Video 

• 28.10.2020 Young BRAG III, com Douglas Guimarães (UNICAMP). Abstract Slides Video 

• 4.11.2020 Israel Vainsencher (UFMG), "Enumerative geometry of legendrian foliations: a tale of contact". Abstract Slides Video 

• 11.11.2020 Javier Gargiulo Acea (Impa), "Rational pullbacks of toric foliations". Abstract Slides Video 

• 18.11.2020 Simone Marchesi (U. Barcelona), "Group actions on vector bundles". Abstract Video Slides 

• 25.11.2020 Oliver Lorscheid (Impa), "The moduli space of matroids". Abstract Slides Video 

• 2.12.2020 Carolina Araujo (Impa), "Birational geometry of Calabi-Yau pairs and 3-dimensional Cremona transformations". Abstract Slides Video

• 24.2.2021 Steven Kleiman (MIT), "Geometry of Gorenstein Artinian Algebras". Abstract Slides Video 

• 3.3.2021 Cristian Martinez (UNICAMP), "Stability under Fourier--Mukai transforms on elliptic surfaces". Abstract Slides Video 

• 10.3.2021 Inder Kaur (PUC Rio), "Questions on the cohomology ring of moduli spaces of stable locally-free sheaves on curves". Abstract Slides Video 

• 17.3.2021 Federico Quallbrunn (Universidad CAECE, Buenos Aires), "Unfoldings of Lie algebroids". Abstract Slides Video 

• 24.3.2021 Giosuè Muratore (UFMG),"Enumeration of rational contact curves via torus actions". Abstract Slides Video 

• 31.3.2021 Young BRAG IV, com Danny Taboada (UFF) e Victor Pretti (UNICAMP). Abstracts Video 

• 7.4.2021 Today's meeting is cancelled, and will be rescheduled for a later date.

• 14.4.2021 Aline Andrade (UFF), "On rank 3 instanton bundles on projective 3-space". Abstract Slides Video 

• 21.4.2021 Alex Massarenti (U. Ferrara), "Complete symmetric quadrics and Kontsevich moduli spaces of conics in Lagrangian Grassmannians". Abstract Slides Video 

• 28.4.2021 Young BRAG V, com João Paulo Lindquist Figueredo (Impa). Abstract Video 

• 5.5.2021 Javier Ribon (UFF), "Local foliations with closed leaves". Abstract Video Slides 

• 12.5.2021 Elizaveta Vishnyakova (UFMG), "Donagi-Witten construction and a graded covering of a supermanifold". Abstract Video Slides 

• 19.5.2021 Emilio Franco (IST, Lisboa), "Deformation theory for orthogonal and symplectic sheaves".  Abstract Slides Video 

• 26.5.2021 Valeriano Lanza (UFF), "Moduli of flags of sheaves: a quiver description". Abstract Slides Video 

• 2.6.2021 William Montoya (UNICAMP), "An extension of the Noether--Lefschetz loci in toric varieties". Abstract Slides Video 

• 9.6.2021 Mini-conferência em memória de Roberto Callejas-Bedregal, com palestras de Abramo Hefez (UFF), Steven Kleiman (MIT), Michelle Morgado (UNESP), Otoniel Nogueira (UFSCar), Marcelo Saia (UFSCar), e José Seade (UNAM) e depoimentos de estudantes, amigos, e colaboradores. Hefez slides  Kleiman slides Morgado slides 

• 16.6.2021 Gaia Comaschi (UNICAMP), "Instanton sheaves of low charge on Fano threefolds". Abstract Slides Video 

• 23.6.2021 Marcos Jardim (UNICAMP), "Logarithmic sheaves for complete intersections". Abstract Slides Video 

• 30.6.2021 Letterio Gatto (Politecnico di Torino), "On the vertex operator  representation of Lie algebras of matrices". Abstract Slides Video 

• 25.8.2021 Arturo Fernández-Pérez (UFMG), "Number of Milnor and Tjurina of foliations". Abstract Slides Video 

• 1.9.2021 Thiago Fassarella (UFF), "Moduli spaces of parabolic Higgs bundles". Abstract Slides Video 

• 8.9.2021 Hossein Movasati (Impa), "Ibiporanga: A moduli space for differential equations of automorphic forms". Abstract Slides Video 

• 15.9.2021 Rodrigo Salomão (UFF), "On the classification of fibrations by singular curves on unirational surfaces". Abstract Slides Video 

• 29.9.2021 Young BRAG VI, com Somaye Behzad (U. Isfahan) e Eduardo da Silva Santos (Impa). Abstract (Somaye)  Abstract (Eduardo) Slides (Eduardo) Slides (Somaye) Video 

• 6.10.2021 Jean Vallès (U. Pau), "Free curves obtained from a pencil of algebraic curves". Abstract Video 

• 20.10.2021 Carolina Araujo (Impa), "Higher Fano manifolds". Abstract Video Slides 

• 27.10.2021 Jacqueline Arancibia (UFPB), "Some applications of Bott's localization formula in enumerative problems". Abstract Video 

• 3.11.2021 Cleto Miranda Neto (UFPB),  "Vanishing of ext modules and characterizations of smoothness in algebraic varieties". Abstract Slides Video 

• 10.11.2021 Hamid Hassanzadeh (UFRJ), "A genus explanation of Buchsbaum-Rim multiplicity". Abstract Notes Video 

• 17.11.2021 Cristhian Garay López (CIMAT), "Inflection polynomials of linear series on superelliptic curves". Abstract Slides 

• 24.11.2021 Margarida Melo (Roma Tre), "Tropicalization of the universal Jacobian: tropical and non-archimedean viewpoints". Abstract Video 

• 1.12.2021 Eduardo Esteves (Impa), "Degenerations of line bundles and divisors along curves".  Abstract Slides Video 

• 8.12.2021 Renato Vidal Martins (UFMG), "The gonality of an integral curve".  Abstract Slides Video 

• 9.3.2022 Felipe Voloch (U. Canterbury), "Maps to the symmetric square of an algebraic curve". Abstract Slides Video 

• 23.3.2022 A mathematical celebration of Steve Kleiman's 80th birthday. Program Video Slides 

• 6.4.2022 Pietro Speziali (Unicamp), "Symmetries of an algebraic curve: the challenges of the positive characteristic". Abstract Slides Video 

• 20.4.2022 João Pedro dos Santos (IMJ, Paris), "Algebraic connections on trivial vector bundles and Galois groups". Abstract Slides Video 

• 4.5.2022 Mauricio Corrêa (U. Bari), "Moduli spaces of reflexive sheaves and classification of distributions".  Abstract Slides 

• 15.7.2022 Cleto Brasileiro Miranda Neto (UFPB), "Some theorems on symbolic powers" and Antonio Nigro (UFF), "Splitting the cohomology of regular semisimple Hessenberg varieties". Abstract (Cleto) Abstract (Antonio) 

• 26.8.2022 Gabriel Ribeiro (École Polytechnique), "Equidistribution of exponential sums"; Grégoire Menet (U. Lille), "Betti numbers for irreducible symplectic orbifolds of dimension 4"; and Daniele Faenzi (U. Bourgogne), "Foliations on homogeneous spaces". Abstract (Gabriel) Abstract (Grégoire) Abstract (Daniele) Video (Gabriel) Video (Grégoire) Video (Daniele) 

• 30.9.2022 Viviana Ferrer (UFF), "Lefschetz Locus in GOR(1,5,5,1) and developable cubics in P^4"; Charles Almeida (UFMG), "Moduli spaces of distributions and generalized null-correlation bundles"; and Eduardo Esteves (Impa), "Quiver representations arising from degenerations of linear series". Abstracts 

• 26.4.2023 Carolina Araujo (Impa), "The Calabi problem for Fano threefolds"; and Thiago Fassarella (UFF), "Torelli-type theorems". Abstracts Slides (Carolina) Slides (Thiago) 

• 29.6.2023 Israel Vainsencher (UFMG/UFF), "Grau de componentes do espaço de folheações em P^3"; and Mauricio Corrêa (U. Bari), "Enumerative geometry of Legendrian foliations: a tale of contact". Abstracts 

• 25.8.2023 Cecília Salgado (U. Groningen), "Mordell-Weil rank jumps on families of elliptic curves"; and Ethan Cotterill (Unicamp), "Towards Brill--Noether theory for cuspidal curves". Abstracts Video (Cecília) Video (Ethan) 

• 19.10.2023 Alex Abreu (UFF), "Computing Brill--Noether classes in the moduli space of curves"; and Olivier Martin (Impa), "Isotrivial Lagrangian fibrations of compact hyper-Kähler manifolds". Abstracts Video (Alex) Video (Olivier) 

Please write to one of the organizers if you'd like to be on our mailing list and receive login details.

----------------------------------

On the 28th of May 2020, our dear friend and fellow organizer Fernando Torres passed away. Fernando leaves behind an important personal and professional legacy.

"Sadia, a man who is remembered with goodness and kindness will never die.

Dead is the one who is not remembered with goodness and kindness." -Saadi of Shiraz