Carissimi,
vi ricordo il seminario di Algebra, Topologia e Combinatoria di domani 11
maggio, che sarà tenuto da Filippo Disanto. Contrariamente a quanto
annunciato prima, il seminario inizierà alle ore 15 esatte.
Cari saluti,
Filippo
========================================
Giovedì 11 maggio 2017, h. 15:00-16:00,
Aula Seminari, Dipartimento di Matematica
Filippo Disanto (Università di Pisa)
Titolo:
Enumerative properties of gene tree configurations in special trees
Abstract:
New developments concerning the relationships between species trees,
representing the branching histories of populations of organisms, and gene
trees, which represent the histories of individual genomic regions, have
generated new combinatorial structures. These include “coalescent
histories” and “ancestral configurations”, structures that for a given gene
tree topology and species tree topology encode the different evolutionary
configurations of the gene tree in the branches of the species trees.
Many configurations might be possible for a given gene tree and species
tree, and their number is a key quantity in the study of the likelihood of
different evolutionary scenarios. Under the assumption of matching gene
trees and species trees, I will present several enumerative results
describing the behavior of the number of coalescent histories and ancestral
configurations for increasing tree size. Techniques rely on generating
functions and tools of analytic combinatorics.
===================================
Seminari successivi:
Giovedì 18 maggio, 15:00-17:00, Sala Seminari
Leonardo Patimo (Max Planck Institute for Mathematics, Bonn)
Titolo: La teoria di Hodge dell'algebra di Hecke e in teoria delle
rappresentazioni.