XXI CLA • Coloquio Latinoamericano de Álgebra

Venue

Pabellón I, Ciudad Universitaria
Buenos Aires, Argentina

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Schedule

July 25, Monday

Morning - Aula Magna

From 8:30	Registration
9:45 ~ 10:00	Opening Ceremony
10:00 ~ 10:50	Cluster Theory Gordana Todorov Chair: María Julia Redondo
11:00 ~ 11:30	Coffee Break & Poster Session
11:30 ~ 12:20	Hopf-Lie theory on hyperplane arrangements Marcelo Aguiar Chair: Rosa Orellana

Afternoon

	S02 Room 5 Commutative Algebra and Algebraic Geometry	S03 Room 2 Hopf Algebras	S04 Room 12 Operator Algebras	S06 Room 3 Algebraic Combinatorics	S09 Room 7 Logic and Universal Algebra	S11 Room 4 Representations of Algebras	S13 Room 6 Number Theory
15:00	Ideals of fat points: subhomaloidal types and symbolic powers A. Simis 15:00 ~ 15:30	Nichols algebras of finite Gelfand-Kirillov dimension over abelian groups N. Andruskiewitsch 15:00 ~ 15:50	Invariants of Operator Systems M. Argerami 15:00 ~ 15:50	Of antipodes and involutions B. Sagan 15:00 ~ 15:25	Monadic Gödel algebras are functional X. Caicedo 15:00 ~ 15:50	Partial relation extensions I. Assem 15:00 ~ 15:50	Sharp lower bounds for regulators of small-degree number fields E. Friedman 15:00 ~ 15:40





15:30

	Tannaka duality for algebraic groups A. Rittatore 15:40 ~ 16:10

							Waldspurger formulas for Hilbert modular forms N. Sirolli 15:50 ~ 16:20

16:00		The classification of Nichols algebras L. Vendramin 16:00 ~ 16:25	Free path groupoid grading on Leavitt path algebras D. Gonçalves 16:00 ~ 16:50	Counting arithmetical structures of a graph and their sandpile groups. C. Valencia Oleta 16:00 ~ 16:25	Model theoretic properties of pseudo real closed fields. S. Montenegro 16:00 ~ 16:25	Split $t$-structures and torsion pairs in hereditary categories S. Trepode 16:00 ~ 16:50



	A Surface Coming from an Arithmetic Question H. Gallegos-Ruiz 16:20 ~ 16:50
							The Mahler measure of elliptic curves M. Lalín 16:25 ~ 16:55
16:30		On rigidity of Nichols algebras M. Kochetov 16:30 ~ 16:55		Cotas para la energía de Nikiforov sobre digrafos N. Agudelo-Muñetón 16:30 ~ 16:55	A new setting for duals of canonical extensions of lattices M. Haviar 16:30 ~ 16:55





17:00	Coffe break & Poster session 17:00 ~ 17:30





17:30	Algebras with a negation map L. Rowen 17:30 ~ 18:00	Partial actions of Hopf algebras: how it all started A. Paques 17:30 ~ 17:55	Globalizations of partial actions and Imprimitivity Theorems D. Ferraro 17:30 ~ 18:10	Lopsided amoebas and effective amoeba approximation L. Matusevich 17:30 ~ 17:55	MV-álgebras separables. M. Menni 17:30 ~ 18:20	On the representation theory of the partition algebra R. Orellana 17:30 ~ 18:10	Heegner point constructions D. Kohen 17:30 ~ 18:00





18:00		The five-term exact sequence for Kac cohomology C. Galindo 18:00 ~ 18:25		The Dehn--Sommerville Relations and the Catalan matroid N. Yamzon 18:00 ~ 18:25
							Overconvergent Eichler-Shimura isomorphisms for Shimura curves D. Barrera Salazar 18:05 ~ 18:35
	How to identify Milnor fibers of smoothings of quotient sigularities G. Urzúa 18:10 ~ 18:40
			On the simplicity and $K$-theory of the $L^p$ operator algebras $\mathcal O^p(Q)$ M. Rodríguez 18:15 ~ 18:55			Gerstenhaber bracket via arbitrary resolution Y. Volkov 18:15 ~ 18:55


18:30		A d.g. Hopf algebra associated to a set theoretical solution of the Yang-Baxter equation and cohomology M. Farinati 18:30 ~ 18:55			Fuzzy Neighborhood Semantics R. Rodriguez 18:30 ~ 18:55



	Shapes of the simplest minimal free resolutions in $\mathbb P^1\times \mathbb P^1$ N. Botbol 18:50 ~ 19:20

19:00

July 26, Tuesday

Morning - Aula Magna

From 8:30	Registration
9:00 ~ 9:50	Elliptic fibrations and K3 surfaces Cecília Salgado Chair: Eduardo Esteves
10:00 ~ 10:30	Coffee Break & Poster Session
10:30 ~ 11:20	Topological methods to solve equations over groups Andreas Thom Chair: Severino Toscano Melo
11:30 ~ 12:20	Tame topology and Complex Analytic Geometry Sergei Starchenko Chair: Alf Onshuus

Afternoon

	S02 Room 5 Commutative Algebra and Algebraic Geometry	S03 Room 2 Hopf Algebras	S04 Room 12 Operator Algebras	S06 Room 3 Algebraic Combinatorics	S09 Room 7 Logic and Universal Algebra	S11 Room 4 Representations of Algebras	S13 Room 6 Number Theory
15:00	Graded rings associated to valuations S. Cutkosky 15:00 ~ 15:30	On Hopf orders and Kaplansky's sixth conjecture J. Cuadra 15:00 ~ 15:50	Nonarchimedean bornological algebras and their cyclic homology G. Cortiñas 15:00 ~ 15:50	Integral hyperplane arrangements M. Aguiar 15:00 ~ 15:25	MV-álgebras monádicas y l-grupos monádicos J. Díaz Varela 15:00 ~ 15:50	Maximal Green Sequences K. Igusa 15:00 ~ 15:50	La criba de Eratóstenes en menos espacio H. Helfgott 15:00 ~ 15:40





15:30				The generalized lifting property of Bruhat intervals P. Sentinelli 15:30 ~ 15:55

	The Birational Geometry of $\overline{M}_{0,6}$ M. Bernal 15:40 ~ 16:10

							Bounding the argument of zeta on the Riemann hypothesis E. Carneiro 15:50 ~ 16:20

16:00		Universal quantum groups associated to a pair of preregular forms C. Walton 16:00 ~ 16:25	Groupoid fibrations and their C*-algebras A. Buss 16:00 ~ 16:50	A proof of the peak polynomial positivity conjecture P. Harris 16:00 ~ 16:25	On hemi-implicative semilattices H. San Martín 16:00 ~ 16:25	A little bit of extra functoriality for Ext and the computation of the Gerstenhaber bracket M. Suárez-Álvarez 16:00 ~ 16:50



	Bernstein--Sato polynomials for ideals in semigroup rings L. Matusevich 16:20 ~ 16:50
							Equidistribución $p$-ádica de órbitas de Hecke y aplicaciones diofantinas R. Menares 16:25 ~ 16:55
16:30		Noncommutative discriminants via Poisson primes M. Yakimov 16:30 ~ 16:55		On trees with the same restriction of the chromatic symmetric function and solutions to the Prouhet-Tarry-Escott problem J. Aliste-Prieto 16:30 ~ 16:55	Epic subalgebras and primitive functions M. Campercholi 16:30 ~ 16:55





17:00	Coffe break & Poster session 17:00 ~ 17:30





17:30	Mod 2 cohomology rings of moduli stacks of Real vector bundles F. Schaffhauser 17:30 ~ 18:00	Non-associative exponentials and the Baker–Campbell–Hausdorff formula J. Mostovoy 17:30 ~ 17:55		Pieri rules for the Macdonald polynomials in superspace and the 6-vertex model L. Lapointe 17:30 ~ 17:55	Stonean residuated lattices R. Cignoli 17:30 ~ 18:20	The blob algebra in positive characteristic and the $p$-Kazhdan-Lusztig polynomials. D. Plaza 17:30 ~ 17:50	CM-points on straight lines A. Pizarro Madariaga 17:30 ~ 18:00





18:00		Pointed and copointed Hopf algebras over dihedral groups G. García 18:00 ~ 18:25		Irreducible characters of the symmetric group as symmetric functions M. Zabrocki 18:00 ~ 18:25		About sums of compositions of irreducible morphisms N. Llodra Schat 18:00 ~ 18:20

	The algebraic density property for affine toric varieties A. Liendo 18:10 ~ 18:40						On the paramodular conjecture G. Tornaría 18:10 ~ 18:40



18:30		Tropical Hopf algebras and weak Hopf algebras L. Rowen 18:30 ~ 18:55			An optimal axiomatization of the set of central elements M. Badano 18:30 ~ 18:55

July 27, Wednesday

Morning - Aula Magna

From 9:30	Registration
10:00 ~ 10:50	On new applications of noncommutative rings Agata Smoktunowicz Chair: Efim Zelmanov
11:00 ~ 11:30	Coffee Break
11:30 ~ 12:20	Arithmetic geometry of toric varieties Jose Ignacio Burgos Gil Chair: Roberto Miatello

July 28, Thursday

Morning - Aula Magna

From 8:15	Registration
9:00 ~ 9:50	Subgroups of the interval exchange transformation group. Kate Juschenko Chair: Andres Navas
10:00 ~ 10:30	Coffee Break & Poster Session
10:30 ~ 11:20	$A_{\infty}$-algebras in representation theory and homological algebra Estanislao Herscovich Chair: Paul Bressler
11:30 ~ 12:20	Cluster algebras and quantum affine algebras Bernard Leclerc Chair: Viacheslav Futorny

Afternoon

	S01 Room 4 Computational Algebra and Applications of Algebra	S05 Room 2 Rings and Algebras	S07 Room 3 Finite Fields	S08 Room 6 Lie Groups and Representations	S10 Room 7 Homological Methods	S12 Room 5 Group Theory
15:00	Waring decompositions of a general polynomial vector G. Ottaviani 15:00 ~ 15:25	Octonions in low characteristics A. Elduque 15:00 ~ 15:45	Castle curves and codes F. Torres 15:00 ~ 15:25	2-representations of Soergel bimodules V. Mazorchuk 15:00 ~ 15:40	Nearest Points on Toric Varieties B. Sturmfels 15:00 ~ 15:30	The relative stable category J. Carlson 15:00 ~ 15:25





15:30	Varieties of apolar subschemes of toric surfaces N. Villamizar 15:30 ~ 15:55		The generalized Hamming weights of Castle codes W. Olaya-León 15:30 ~ 15:55		Codimension two $A$-hypergeometric systems L. Matusevich 15:30 ~ 16:00	Groups of circle homeomorphisms with invariant laminations. J. Alonso 15:30 ~ 15:55

				Representation ring of Levi subgroups versus cohomology ring of flag varieties S. Kumar 15:40 ~ 16:20
		Polynomial identities, codimensions and a conjecture of Regev A. Giambruno 15:45 ~ 16:10


16:00	Resultants modulo p C. D'Andrea 16:00 ~ 16:25		On the second lowest Hamming weight of binary projetive Reed-Muller codes C. Carvalho 16:00 ~ 16:25		On Unimodality of Hilbert Function Graded Algebras H. Srinivasan 16:00 ~ 16:30	Simple groups of intermediate growth V. Nekrashevych 16:00 ~ 16:25

		Essencial idempotents in group algebras and coding theory C. Polcino Milies 16:10 ~ 16:35

				On the Demazure Type Structure of Graded Limits of Representations of Quantum Affine Algebras A. Moura 16:20 ~ 17:00

16:30	Sums of squares and the geometry of syzygies M. Velasco 16:30 ~ 16:55		Some remarks on the asymptotic behavior of cyclic AG-codes M. Chara 16:30 ~ 16:55		The syzygies of some thickenings of determinantal varieties C. Raicu 16:30 ~ 17:00	Large scale geometry of Heintze groups M. Carrasco 16:30 ~ 16:55
		Free groups in a normal subgroup of the field of fractions of a skew polynomial ring J. Goncalves 16:35 ~ 17:00




17:00	Coffe break & Poster session 17:00 ~ 17:30





17:30	Computing the Homology of Real Projective Sets T. Krick 17:30 ~ 17:55	Non-commutative algebraic geometry of semi-graded rings O. Lezama 17:30 ~ 17:55	Estimates for polynomial systems defining irreducible smooth complete intersections G. Matera 17:30 ~ 17:55	Positivity of parabolic Kazhdan-Lusztig polynomials N. Libedinsky 17:30 ~ 18:10	Title: Invariant theory of Milnor algebras J. Alper 17:30 ~ 18:00	Word maps on finite simple groups E. O'Brien 17:30 ~ 18:20





18:00	Critical points via Monodromy and Numerical Algebraic Geometry A. Martin del Campo 18:00 ~ 18:25	On finite generation and presentation of algebras A. Alahmadi 18:00 ~ 18:25	The distribution of points on families of curves over finite fields M. Lalín 18:00 ~ 18:25		Relative Igusa-Todorov functions M. Lanzilotta 18:00 ~ 18:30

				Tensor products of minimal affinizations in type $A$ F. Pereira 18:10 ~ 18:30



18:30	Numerically computing Galois groups J. Rodriguez 18:30 ~ 18:55	Automorphisms of ideals of polynomial rings T. Castilho de Mello 18:30 ~ 18:55	Finite Field Constructions of Combinatorial Arrays L. Moura 18:30 ~ 18:55	K-groups in the theory of symmetric spaces W. Werner 18:30 ~ 18:50	Applications of volume to commutative algebra S. Cutkosky 18:30 ~ 19:00	Flexibility of representations of $\pi_1(\Sigma)$ into the space of orentation preserving homeomorphisms or the line. J. Brum Ocaso 18:30 ~ 18:55





19:00	Computational algebra for the working mathematician C. Hillar 19:00 ~ 19:25

July 29, Friday

Morning - Aula Magna

From 9:30	Registration
10:00 ~ 10:50	Sum-product estimates in finite fields Moubariz Garaev Chair: Fernando Torres
11:00 ~ 11:30	Coffee Break & Poster Session
11:30 ~ 12:20	Tensors and their Eigenvectors Bernd Sturmfels Chair: Alicia Dickenstein

Afternoon

	S01 Room 4 Computational Algebra and Applications of Algebra	S05 Room 9 Rings and Algebras	S07 Room 3 Finite Fields	S08 Room 6 Lie Groups and Representations	S10 Room 7 Homological Methods	S12 Room 5 Group Theory
15:00	Dowker complex, convex codes, and detecting hidden matrix factorizations. V. Itskov 15:00 ~ 15:25	Finitely presented Lie and Jordan algebras E. Zelmanov 15:00 ~ 15:45	Galois geometries and Random network coding L. Storme 15:00 ~ 15:25	Belavin-Drinfeld Lie bialgebras and quantum groups (Galois cohomology considerations) A. Pianzola 15:00 ~ 15:40	Nonsymmetric operads, associative algebras, and the Lagrange inversion V. Dotsenko 15:00 ~ 15:30	Towards algebraic Nielsen-Thurston classification for braids M. Calvez 15:00 ~ 15:25





15:30	Toric ideals of neural codes N. Youngs 15:30 ~ 15:55		Weierstrass semigroup and Automorphism group of the curves $X_{n,r}$ G. Tizziotti 15:30 ~ 15:55		Hochschild homology and cohomology of down-up algebras A. Solotar 15:30 ~ 16:00	Circular orderings on the free group C. Rivas 15:30 ~ 15:55

				cohomology of finite, algebraic, and quantum groups L. Scott 15:40 ~ 16:20
		Graded algebras and polynomial identities E. Aljadeff 15:45 ~ 16:10


16:00	Algebraic signatures of convex and non-convex neural codes A. Shiu 16:00 ~ 16:25		Asymptotically good 4-quasi transitive AG-codes over prime fields R. Podestá 16:00 ~ 16:25		Homología cíclica de productos cruzados débiles (Cyclic homology of weak crossed products) J. Guccione 16:00 ~ 16:30	On set-theoretic solutions to the Yang-Baxter equation V. Lebed 16:00 ~ 16:25

		Color involutions of primitive graded rings. I. Sviridova 16:10 ~ 16:35



16:30	The structure of MESSI biological systems M. Pérez Millán 16:30 ~ 16:55		A problem of Beelen, Garcia and Stichtenoth on an Artin-Schreier tower H. Navarro 16:30 ~ 16:55		Isomorphism conjectures with proper coefficients E. Ellis 16:30 ~ 17:00	Cryptosystems using subgroup distortion D. Kahrobaei 16:30 ~ 16:55
		Lie algebras of slow growth V. Petrogradsky 16:35 ~ 17:00




17:00	Coffe break & Poster session 17:00 ~ 17:30





17:30	On computational aspects of the generalized differential Lüroth's theorem G. Jeronimo 17:30 ~ 17:55	On $D$ algebras. L. Makar-Limanov 17:30 ~ 17:55	Arithmetic Mirror Symmetry of K3 Surfaces and Hypergeometric Functions. A. Salerno 17:30 ~ 17:55		BV-algebra Structures and Hochschild (Co)homology D. Duarte Vogel 17:30 ~ 18:00	Connectedness of generating sets for finite groups M. Conder 17:30 ~ 18:20





18:00	Arithmetical structures of graphs. C. Valencia Oleta 18:00 ~ 18:25	Partial actions and subshifts M. Dokuchaev 18:00 ~ 18:25	Estimates on the average cardinality of the value set of general families of univariate polynomials over a finite field M. Privitelli 18:00 ~ 18:25

				Gröbner bases for local Weyl modules for generalized current $\mathfrak{sl}_2$-algebras A. Bianchi 18:10 ~ 18:30



18:30	Tropical Graph Curves M. Madhusudan 18:30 ~ 18:55	Identities of finitely generated alternative and Malcev algebras I. Shestakov 18:30 ~ 18:55	Iterating Redei Functions over Finite Fields D. Panario 18:30 ~ 18:55	Lie subalgebras of the matrix quantum pseudo differential operators K. Batistelli 18:30 ~ 18:50		Multifraction reduction in Artin-Tits groups P. Dehornoy 18:30 ~ 19:20





19:00