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August 31 to September 4, 2026IMPA, Rio de Janeiro

16th ALGA meeting - Commutative Algebra and Algebraic Geometry

Since 1997, the ALGA meetings (Álgebra Comutativa e Geometria Algébrica) have served as a vital forum for the Brazilian community working in Commutative Algebra and Algebraic Geometry, as well as their international collaborators. Over the years, ALGA has played a central role in fostering research, collaboration, and the growth of this vibrant mathematical community.

We are pleased to announce the 16th edition of ALGA, which will be a special occasion as we celebrate the 60th birthday of Eduardo Esteves, a central and beloved figure in the field and an influential presence in the Brazilian algebraic community. This event is organized in partnership with the Clay Mathematics Institute.

Proposals for poster presentations or contributed talks by young researchers may be submitted via the registration form by June 15th.

*Official hotels and travel agencies are not authorized to contact participants directly unless prior contact has been established by the participant. If you receive messages from hotels or travel agencies regarding the event, please be aware that they are not sent by the event organizers and may be fraudulent. All official event communications are sent exclusively from eventos@impa.br.*

Registration

Registration Costs

	Until 30/06/2026 23:59	Until 04/09/2026 23:59
Students (Rio de Janeiro)	R$ 30,00	R$ 30,00
Students	R$ 50,00	R$ 75,00
Researchers	R$ 100,00	R$ 150,00

Program

Videos

YouTube Playlist

Speakers

Alex Abreu (UFF)
Computing Classes on $\overline{\mathcal{M}}_{g,n}$

Omid Amini (École Polytechnique, France)
Limit canonical series

Aline Andrade (UFMG)
Minimal Generators for Pinched Veronese Varieties

Karl Christ (University of Turin, Italy)
Scrollar invariants of singular curves on toric surfaces

Marcelo Escudeiro (UEM)
On the analytical equivalence of plane curves

Letterio Gatto (Politecnico di Torino, Italy)
Crossing the boundary, in search of limits (Eduardo Esteves: The First Thirty Years of a Mathematical Journey)

Svetlana Makarova (Australian National University, Australia)
Contractions via moduli of sheaves

Olivier Martin (IMPA)
Rationally inequivalent points on complete intersections

Alex Massarenti (University of Ferrara, Italy)
Rationality, unirationality, and rational connectedness

Nivaldo Medeiros (UFF)
Homaloidal hypersurfaces and a product formula for gradient maps

Margarida Melo (Roma Tre University, Italy)
Compactified spaces of roots of bundles over curves via logarithmic geometry

Alan Muniz (UFPE)
Minimal-Degree Foliations on Cominuscule Grassmannians

Claudia Polini (University of Notre Dame, USA)
New Results on Linkage and Licci Ideals

Mihnea Popa (Harvard University, USA)
Negative K-theory and Hodge theory

Anita Rojas (Universidad de Chile, Chile)
Abelian varieties: Subvarieties and Decompositions

Bernd Ulrich (Purdue University, USA)
Generalized multiplicities and criteria for integral dependence

Renato Vidal Martins (UFMG)
Stability conditions for coherent systems on integral curves

Fillipo Viviani (Roma Tre University, Italy)
On the classification of compactified universal Jacobians

Felipe Voloch (University of Canterbury, New Zealand)
Subsets of P^4 with no four points on a plane

Presentation by Young Researcher (PYR)

Roberto Alvarenga (UNESP)
Moduli of parabolic bundles on an elliptic curve

Felipe de León Saenz Angel (IMPA)
Mustafin Varieties and Linked Projective Spaces

Giusi Capobianco (Universita Degli Studi Di Roma Tor Vergata)
The tropical theta divisor

Luana Costa (IMPA)
Algebraic Geometry Codes on Surfaces

João Paulo Figueredo (UFF)
Non-algebraicity of foliations via reduction modulo 2

Cesar Hilario (PUC DEL PERU)
Regular non-smooth quartic curves

Rafael Holanda (UFPE)
Multiple Tor modules and Mayer-Vietoris spectral sequences

Paulo Martins (ICMC USP)
Generalized symmetry in the vanishing of Ext

Igor Nascimento (UFPR – Jandaia do Sul)
Some Homological Conjectures over Idealization Rings

Ana Quedo (Universitr Degli Studi Di Ferrara)
On automorphisms of hypersurfaces in Fano and Calabi Yau varieties

Adina Veronica Remor (UFPR)
The minimal free resolution of full Nagata algebras

Victor Daniel Mendoza Rubio (USP-São Carlos)
Some contributions to the theory of quasi-homological dimensions

Sajad Salami (UERJ)
Rational Points in Weighted Projective Spaces over Finite Fields

Wállace de Sousa (UFPB)
Configurations of Skew Lines on Cubic Surfaces

Pôsters

Cristhian Paúl Neyra Salvador (UFSCar)
Boundary spectral data for $K_X(D)$-twisted spectral curves

Ethan Guy Cotterill (UNICAMP)
Enriched inflection and secant planes for linear series on algebraic curves

Jennyfer Juliana Calderon Moreno (UNICAMP)
Gonality of Unisingular Curves

Joel Torres Del Valle (Universidad de Antioquía)
Linear Series on Supercurves

Paulo Vitor Assis Silva (UFRJ)
Regularity and Multiplicity of Veronese type algebras

Organizing Committee

Carolina Araujo (IMPA)
Juliana Coelho (UFF)
Suely Lima (IMPA)
Marco Pacini (UFF)
Eduardo Vital (Bielefeld University, Germany)

Scientific Committee

Alicia Dickenstein (UBA, Argentina)
Abramo Hefez (UFF)
Marcos Jardim (Unicamp)
Ragni Piene (University of Oslo, Norway)
Aron Simis (UFPE)
Israel Vainsencher (UFMG)

Social Events

To celebrate Eduardo Esteves’s birthday, participants are invited to a reception on Monday and to a social dinner on Thursday. The reception is hosted by the conference, while details of the dinner will be announced shortly.

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