Speaker
David Broadhurst
(Open University, UK)
Description
Numerical evaluations of 2-loop kites and 3-loop tadpoles
with elliptic obstructions lead to remarkable empirical
evaluations in terms of polylogarithms, for which proofs
are very hard to find, notwithstanding intensive use of packages
such as HyperInt and MZIteratedIntegral. I shall describe the
efficient methods by which these puzzlingly simple evaluations
were obtained and current efforts to demystify them.
Primary author
David Broadhurst
(Open University, UK)
