分野別セミナー

In this talk I will introduce some histories on topological
lower bounds for the chromatic numbers of (r-)graphs, together with
a comparison of the Hom complexes and the box complexes, both are
associated to r-graphs and equipped with right actions of the
symmetric group on r letters, in views of equivariant simple
homotopy types via a powerful tool--an equivariant acyclic partial
matching.


※ 今回のセミナーはいつもと曜日と場所が違いますのでご注意ください。