Ciclo de Seminários

Os Seminários PESC têm como objetivo trazer palestras acessíveis a um público mais amplo, ministradas por pesquisadores e professores mais experientes (tanto do PESC como de instituições externas). Ao longo do ano, teremos temas e focos variados, podendo ser mais específicos ou mais abrangentes.

A apresentação e discussão de ideias novas e antigas de diferentes temas contribui de maneira fundamental para a formação e pesquisa desenvolvida por alunos e professores, sendo muitas vezes de interesse de um público mais amplo.

Os Seminários que são on-line ou híbridos ficam gravados no Canal do PESC no YouTube, que apresenta muitas outras gravações importantes sobre o que acontece no PESC.

Próximos Seminários:

Vadim V. Lozin, Associate Professor, University of Warwick, Inglaterra
5 de novembro de 2014

Resumo - Slides

The satisfiability problem is known to be NP-complete in general and for many restricted instances, such as formulas with at most 3 variables per clause and at most 3 occurrences per variable, or planar formulas. The latter example refers to graphs representing satisfiability instances. These are bipartite graphs with vertices representing clauses and variables, and edges connecting variables to the clauses containing them.

Finding the strongest possible restrictions under which the problem remains NP-complete is important for at least two reasons. First, this can make it easier to establish the NP-completeness of new problems by allowing easier transformations. Second, this can help clarify the boundary between tractable and intractable instances of the problem. In this talk, we address the second issue and reveal the first boundary property of graphs representing satisfiability instances

Biografia resumida

Vadim Lozin received his Ph.D. in Theoretical Computer Science in 1995 from the University of Nizhny Novgorod, Russia. In 2000, he moved to Rutgers University (USA) and in 2007, to the University of Warwick (UK), where he now is an Associate Professor (Reader) of Mathematics. He also held a number of short-term visiting academic positions in Sweden, Portugal, Switzerland, Canada, Germany, Saudi Arabia, France. He is an author of more than 100 publications in the area of Discrete Mathematics and Theoretical Computer Science. Six Ph.D. students defended their dissertations under the direction of Vadim Lozin. He is an Associate Editor of the journal "Discrete Applied Mathematics", Managing Editor of the journal "Electronic Notes in Discrete Mathematics", and a member of the editorial board of the journal "Discussiones Mathematicae Graph Theory".

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Ciclo de Seminários

Próximos Seminários:

Boundary properties of the Satisfiability problem