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SUMMARY:Multiple polylogarithms and Feynman integrals - Christian Bogner (
 Humboldt Uni Berlin)
DTSTART:20140314T160000Z
DTEND:20140314T170000Z
UID:TALK50051@talks.cam.ac.uk
CONTACT:Damien George
DESCRIPTION:Most\, but not all known Feynman integrals\, arising from vari
 ous quantum field theories\, can be expressed by certain generalizations o
 f polylogarithms.  I discuss an implementation of multiple polylogarithms 
 in several variables\, which is a very general class of such functions\, a
 nd comment on a criterion which helps to decide\, which Feynman integrals 
 can be computed in this framework. I furthermore discuss a result for the 
 two-loop sunrise graph with arbitrary masses\, where this criterion is not
  satisfied.
LOCATION:MR4\, CMS\, Wilberforce Road\, Cambridge\, CB3 0WB
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