Filtrations on instanton homology
  In earlier work of the authors, the Khovanov complex of a knot or link appeared as the first page in a spectral sequence abutting to the instanton homology. The quantum and (co)homological gradings on Khovanov homology do not survive as gradings, but we show that they survive as filtrations. 
P. B. Kronheimer and T. S. Mrowka
math.GT