Eight dimensional physics and the Langlands program - A short note
  We argue that a special step in the chain of dualities used in [Tan 2008] implicitly suggests to view Langlands duality as being fundamentally rooted in an eight-dimensional theory on the F-theory 7- brane. We give further arguments why such an eight-dimensional per- spective might be of interest. 
Karl-Georg Schlesinger
hep-th