Algebraic Combinatorics - Karen Yeats
Title: Poset subHopf algebras from growth models in causal set theory and quantum field theory
Speaker: | Karen Yeats |
Affiliation: | University of Waterloo |
Location: | MC 5501 and Zoom - please contact Oliver Pechenik for the Zoom link |
Abstract: In a story some of you have heard from me before, we get subHopf algebras of the Connes-Kreimer Hopf algebra of rooted trees from certain simple tree classes which correspond to solutions to combinatorial analogues of Dyson-Schwinger equations in quantum field theory. Another important subHopf algebra of the Connes-Kreimer Hopf algebra is the Connes-Moscovici Hopf algebra which can be viewed as coming from rooted trees grown by adding leaves.