W(1+infinity) algebra as a symmetry behind AGT relation
  We give some evidences which imply that W(1+infinity) algebra describes the symmetry behind AGT(-W) conjecture: a correspondence between the partition function of N=2 supersymmetric quiver gauge theories and the correlators of Liouville (Toda) field theory. 
Shoichi Kanno, Yutaka Matsuo and Shotaro Shiba
hep-th math-ph math.MP