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math.AP2003
Green's formulas for cone differential operators
Ingo Witt
Green's formulas for elliptic cone differential operators are established. This is done by an accurate description of the maximal domain of an elliptic cone differential operator a…
math.AP2003
Energy estimates for weakly hyperbolic systems of the first order
Michael Dreher, Ingo Witt
For a class of weakly hyperbolic systems of the form D_t - A(t,x,D_x), where A(t,x,D_x) is a first-order pseudodifferential operator whose principal symbol degenerates like t^{l_*}…