17 декабря (вторник), 16:00, аудитория 307 ИППИ РАН
Rooted Tree Graphs and Transformation Groups
Series solutions of ordinary differential equations are indexed by rooted tree graphs. It was discovered by Butcher that there is an infinite-dimensional transformation group associated with rooted tree graphs. His discovery was in the context of numerical analysis of ordinary differential equations, but the same group emerges in the Connes-Kreimer approach to renormalization in quantum field theory. This talk will explore the combinatorial background to this subject.
| 14.12.2013 | |