XI Latin and American Algorithms, Graphs and Optimization Symposium

May 17-21, 2021. São Paulo. Brazil.

LAGOS 2021

⬇ Full program ⬇

(Times in the program are shown in BRT Time (UTC -3))

Monday, May 17

BRT TIME ACTIVITY (place)
9:00 AM Getting to know Virtual Chair space
9:30 AM Opening (auditorium)
10:00 AM Technical session 1 (room A)
Chair: Yoshiharu Kohayakawa
Technical session 2 (room B)
Chair: Vinícius Fernandes dos Santos
10:00 AM Simón Piga and Nicolás Sanhueza-Matamala
Codegree conditions for cycle decompositions and Euler tours in 3-uniform hypergraphs
Salomon Bendayan, Yanjia Li, Bruce Reed and Jordan Barrett
Partitioning Into Prescribed Number of Cycles and Mod k T-join With Slack
10:20 AM Julia Böttcher, Olaf Parczyk, Amedeo Sgueglia and Jozef Skokan
Cycle factors in randomly perturbed graphs
Guillaume Ducoffe, Thomas Dissaux, Nicolas Nisse and Simon Nivelle
Treelength of Series-parallel Graphs
10:40 AM Peter Allen, Julia Böttcher, Ewan Davies, Eng Keat Hng and Jozef Skokan
An approximate blow-up lemma for sparse hypergraphs
Clément Dallard, Robert Ganian, Meike Hatzel, Matjaž Krnc and Martin Milanič
Graphs with Two Moplexes
11:00 AM Extra Q&A for technical sessions (lobby) / Break
11:15 AM Plenary lecture: Jose R. Correa (auditorium)
Chair: Manoel Campelo
12:15 PM Lunch break
2:00 PM Plenary lecture: Xingxing Yu (auditorium)
Chair: Jayme Szwarcfiter
3:00 PM Break
3:15 PM Technical session 3 (room A)
Chair: Carlos Hoppen
Technical session 4 (room B)
Chair: Cândida Nunes da Silva
3:15 PM Ndiamé Ndiaye, Noah Brustle, Sarah Clusiau, Vishnu V. Narayan, Bruce Reed and Ben Seamone
The Speed and Threshold of the Biased Perfect Matching Game
Guilherme de Castro Mendes Gomes and Vinicius F. dos Santos
Kernelization results for Equitable Coloring
3:35 PM John Machacek
Unique maximum independent sets in graphs on monomials of a fixed degree
Diane Castonguay, Celina M. H. de Figueiredo, Luis A. B. Kowada, Caroline S. R. Patrão, Diana Sasaki and Mario Valencia-Pabon
On total coloring the direct product of complete graphs
3:55 PM Adrián Pastine, Pablo Torres and Mario Valencia-Pabon
On the diameter of Schrijver graphs
Mauro Nigro Alves Junior, Diana Sasaki and Matheus Adauto
On total coloring of 4-regular circulant graphs
4:15 PM Maurício Collares, Yoshiharu Kohayakawa, Carlos Moreira and Guilherme Mota
Constrained colourings of random graphs
Isabel F. A. Gonçalves, Simone Dantas and Diana Sasaki
On equitable total coloring of snarks
4:35 PM Extra Q&A for technical sessions (lobby)

Tuesday, May 18

BRT TIME ACTIVITY (place)
10:00 AM Technical session 5 (room A)
Chair: Maurício Collares
Technical session 6 (room B)
Chair: Fabiano Oliveira
10:00 AM Jean Cardinal, Lionel Pournin and Mario Valencia-Pabon
Bounds on the Diameter of Graph Associahedra
Luis Gustavo Da Soledade Gonzaga, Sheila Almeida, Cândida Nunes Da Silva and Jadder Bismarck Sousa Cruz
The chromatic index of split-interval graphs
10:20 AM Sören Berger, Simon Piga, Christian Reiher, Vojtěch Rödl and Mathias Schacht
Turán density of cliques of order five in 3-uniform hypergraphs with quasirandom links
Florent Foucaud, Suchismita Mishra, Narayanan Narayanan, Reza Naserasr and Petru Valicov
Cliques in exact distance powers of graphs of given maximum degree
10:40 AM Pranshu Gupta, Yannick Mogge, Simon Piga and Bjarne Schülke
Maximum size of r-cross t-intersecting families
Adriana Hansberg, Amanda Montejano and Yair Caro
Recursive constructions of amoebas
11:00 AM Extra Q&A for technical sessions (lobby) / Break
11:15 AM Plenary lecture: Silvano Martello (auditorium)
Chair: Eduardo Moreno
12:15 PM Lunch break
13:00 PM Minicourse "Some Discrete Aspects of Semidefinite Programming"
Marcel Kenji de Carli Silva
2:00 PM Joseph S. B. Mitchell (auditorium)
Chair: Carlos Hoppen
3:00 PM Break
3:15 PM Technical session 7 (room A)
Chair: Simon Piga
Technical session 8 (room B)
Chair: Javier Marenco
3:15 PM Maurício Collares, Yoshiharu Kohayakawa, Taísa Martins, Roberto Parente and Victor Souza
Hitting times for arc-disjoint arborescences in random digraph processes
Hugo Kooki Kasuya Rosado, Marcelo Pinheiro Leite Benedito and Lehilton Lelis Chaves Pedrosa
On the Inapproximability of the Cable-Trench Problem
3:35 PM Vitor T. F. de Luca, Fabiano Oliveira and Jayme Szwarcfiter
Minimum Number of Bends of Paths of Trees in a Grid Embedding
Javier Akagi, Eduardo Canale and Marcos Villagra
Tromino Tilings with Pegs via Flow Networks
3:55 PM Fábio Botler, Carlos Hoppen and Guilherme Mota
Counting orientations of graphs with no strongly connected tournaments
Felipe de C. Pereira, Pedro J. de Rezende and Cid C. de Souza
Effective Heuristics for the Perfect Awareness Problem
4:15 PM Andrea Jiménez, Maycon Sambinelli, Fábio Botler and Yoshiko Wakabayashi
The 2-Decomposition Conjecture for a new class of graphs
Klairton Lima Brito, Andre Rodrigues Oliveira, Alexsandro Oliveira Alexandrino, Ulisses Dias and Zanoni Dias
Reversal and Transposition Distance of Genomes Considering Flexible Intergenic Regions
4:35 PM Extra Q&A for technical sessions (lobby)

Wednesday, May 19

BRT TIME ACTIVITY (place)
10:00 AM Technical session 9 (room A)
Chair: Diane Castonguay
Technical session 10 (room B)
Chair: Tássio Naia dos Santos
10:00 AM Marina Groshaus and André L. P. Guedes
Biclique Graphs of K3-free Graphs and Bipartite Graphs
Matheus Diógenes Andrade and Fábio Luiz Usberti
Combinatorial properties for the green vehicle routing problem
10:20 AM Guilherme de Castro Mendes Gomes and Vinicius F. dos Santos
On structural parameterizations of the selective coloring problem
Marcelo Bianchetti and Javier Marenco
Valid inequalities and a branch-and-cut algorithm for the routing and spectrum allocation problem
10:40 AM Lucas Böltz, Benjamin Becker and Hannes Frey
Local Construction of Connected Plane Subgraphs in Graphs Satisfying Redundancy and Coexistence
Cecília Lescano Osório and Edna Hoshino
A branch-and-price algorithm for the ring/ring problem
11:00 AM Extra Q&A for technical sessions (lobby) / Break
11:15 AM Plenary lecture: Laura Sanità (auditorium)
Chair: Luerbio Faria
12:15 PM Official photo
12:30 PM Lunch break
13:00 PM Minicourse "Some Discrete Aspects of Semidefinite Programming"
Marcel Kenji de Carli Silva
2:00 PM Plenary lecture: Kirk Pruhs (auditorium)
Chair: Cristina Gomes Fernandes
3:00 PM Break
3:15 PM Technical session 11 (room A)
Chair: Marina Groshaus
Technical session 12 (room B)
Chair: Rudini Menezes Sampaio
3:15 PM Antoine Genitrini, Martin Pépin and Alfredo Viola
Unlabelled ordered DAGs and labelled DAGs: constructive enumeration and uniform random sampling
Pierre Bergé and Michel Habib
Diameter in linear time for constant-dimension median graphs
3:35 PM Ndiamé Ndiaye, Noah Brüstle, Sarah Clusiau, Bruce Reed, Ben Seamone and Vishnu V. Narayan
The Speed and Threshold of the Biased Hamilton Cycle Game
Roberta Rasoviti Marques Costa Moço, Alberto Alexandre Assis Miranda and Cândida Nunes da Silva
The signature matrix for 6-Pfaffian graphs
3:55 PM Flavia Bonomo-Braberman and Gastón Brito
Intersection models for 2-thin and proper 2-thin graphs
Léo V. Peres and Ricardo Dahab
Tutte’s 3-flow conjecture for almost even graphs
4:15 PM Josefran de O. Bastos, Hanno Lefmann, Andy Oertel, Carlos Hoppen and Dionatan R. Schmidt
Maximum number of r-edge-colorings such that all copies of K_k are rainbow
Bernardo Abrego, Julia Dandurand and Silvia Fernandez
The crossing number of centrally symmetric complete geometric graphs
4:35 PM Extra Q&A for technical sessions (lobby)

Thursday, May 20

BRT TIME ACTIVITY (place)
10:00 AM Technical session 13 (room A)
Chair: Sulamita Klein
Technical session 14 (room B)
Chair: Fábio Botler
10:00 AM Daniel A. Quiroz
Complete immersions in graphs with independence number two and small forbidden subgraphs
Ishay Haviv and Michal Parnas
Upper Bounds on the Boolean Rank of Kronecker Products
10:20 AM Luerbio Faria, André L. P. Guedes and Lilian Markenzon
On feedback vertex set in reducible flow hypergraphs
Andrzej Lingas
Consequences of APSP, triangle detection, and 3SUM hardness for separation between determinism and non-determinism
10:40 AM Claudia Gonçalves, Emerson Monte Carmelo and Irene Nakaoka
Polarity graphs and C4-free multipartite graphs
Susanna F. de Rezende
Automating Tree-Like Resolution in Time no(log n) Is ETH-Hard
11:00 AM Extra Q&A for technical sessions (lobby) / Break
11:15 AM Plenary lecture: Jayme L. Szwarcfiter (auditorium)
Chair: Flavia Bonomo
12:15 PM Lunch break
13:00 PM Minicourse "Some Discrete Aspects of Semidefinite Programming"
Marcel Kenji de Carli Silva
2:00 PM Plenary lecture: Eduardo Uchoa (auditorium)
Chair: Flávio Keidi Miyazawa
3:00 PM Break
3:15 PM Technical session 15 (room A)
Chair: Lilian Markenzon
Technical session 16 (room B)
Chair: Susanna Rezende
3:15 PM Lucas Keiler, Carlos Vinicius G. C. Lima, Ana Karolinna Maia, Rudini Sampaio and Ignasi Sau
Target set selection with maximum activation time
Mahmoud Abo Khamis, Sungjin Im, Benjamin Moseley, Kirk Pruhs and Alireza Samadian
Instance Optimal Join Size Estimation
3:35 PM Márcia R. Cappelle, Guilherme de Castro Mendes Gomes and Vinicius F. dos Santos
Parameterized algorithms for locating-dominating sets
Hessa Al-Thani and Jon Lee
Tridiagonal Maximum-Entropy Sampling and Tridiagonal Masks
3:55 PM Marcelo P. L. Benedito and Lehilton L. C. Pedrosa
A parameterized approximation scheme for the Star k-Hub Center
Wilder Mendes, Simone Dantas and Sylvain Gravier
The (a,b)-monochromatic transversal game on biclique-hypergraphs of powers of paths and of powers of cycles
4:15 PM Extra Q&A for technical sessions (lobby)

Friday, May 21

BRT TIME ACTIVITY (place)
10:00 AM Technical session 17 (room A)
Chair: Orlando Lee
Technical session 18 (room B)
Chair: Daniel Quiroz
10:00 AM Enrico Malaguti and Vagner Pedrotti
A new formulation for the Weighted Safe Set Problem
Laura Eslava, Sarah Penington and Fiona Skerman
Survival for a Galton-Watson tree with cousin mergers
10:20 AM Henrique Becker, Luciana Buriol and Olinto Araújo
Extending an Integer Formulation for the Guillotine 2D Bin Packing Problem
Daniel Bastos and Luis Kowada
How to detect whether Shor's algorithm succeeds against large integers without a quantum computer
10:40 AM Manuela Blaum and Javier Marenco
Valid inequalities and complete characterizations of the 2-domination and the P3-hull number polytopes
Hessa Al-Thani and Jon Lee
Tridiagonal Maximum-Entropy Sampling and Tridiagonal Masks
11:00 AM Extra Q&A for technical sessions (lobby) / Break
11:15 AM Plenary lecture: Kristina Vušković (auditorium)
Chair: Celina Figueiredo
12:15 PM Lunch break
2:00 PM Plenary lecture: Martin Grötschel (auditorium)
Chair: Yoshiko Wakabayashi
3:00 PM Break
3:15 PM Special session 🦉 Yoshiko Wakabayashi (auditorium)
3:55 PM Best paper award (auditorium)
4:15 PM Closing remarks (auditorium)
4:35 PM Business meeting (auditorium)