Tableaux, Plactic Monoid and Secondary Structures, (24 de Abril de 2015)

Diego Villamizar

Estudiante de Matemáticas

Universidad Sergio Arboleda

We will talk about the importance of tableaux in combinatorial statistics on words applied in DNA/RNA secondary structures, and we will show some uses of the Knuth equivalences in words for a possible generalization of those structures.

On the Stability of the PWP Method, (17 de Abril de 2015)

Angelica Vargas

Profesora Departamento de Matemáticas

Universidad Sergio Arboleda

The PWP method was introduced by Díaz in 2009 as a technique for measuring indirect influences in complex networks. It depends on a matrix $D$, provided by the user, called the matrix of direct influences,  and  on a positive real parameter $\lambda$ which is part of the method itself. We study changes in the method's predictions as $D$ and $\lambda$ vary.