6 citations · 8 across the 5 of their papers we have counts for
5 papers
Local solvability of second order differential operators with double characteristics I: Necessary conditions
Detlef Mueller
This is a the first in a series of two articles devoted to the question of local solvability of doubly characteristic second order differential operators. For a large class of such…
Wave equation and multiplier estimates on ax+b groups
Detlef Mueller, Christoph Thiele
Let L be the distinguished Laplacian on certain semidirect products of R by R^n which are of ax+b type. We prove pointwise estimates for the convolution kernels of spectrally local…
Sub-Laplacians of holomorphic -type on exponential solvable groups
W. Hebisch, J. Ludwig, D. Mueller
Let denote a right-invariant sub-Laplacian on an exponential, hence solvable Lie group , endowed with a left-invariant Haar measure. Depending on the structure of , and p…
Solvability of dissipative second order left-invariant differential operators on the Heisenberg group
Detlef Mueller
We prove local solvability for large classes of operators of the form where the are left-invariant vector fields on the Heisenberg g…
Damped oscillatory integrals and boundedness of maximal operators associated to mixed homogeneous hypersurfaces
I. A. Ikromov, M. Kempe, D. Mueller
We study the boundedness problem for maximal operators in 3-dimensional Euclidean space associated to hypersurfaces given as the graph of , where is a mixed homogeneous fu…