We study C∞ and analytic hypoellipticity for an invariant class of operators with multiple characteristics, which generalize the Gilioli–Treves model
AbstractA celebrated theorem of Hörmander gives a sufficient condition for a second order differenti...
AbstractThe purpose of this paper is to establish the following result. LetL1andL2be subelliptic ope...
AbstractRecently, N. Hanges proved that the operatorP=∂t2+t2Δx+∂θ(x)2 in R3 is analytic hypoelliptic...
We study C∞ and analytic hypoellipticity for an invariant class of operators with multiple ch...
Let $P(x, D)$ be a partial differential operator with principal symbol $p_m(x, \xi)=q_{m-l}(x, \xi)a...
We study the hypoellipticity of (pseudo)differential operators in one variable when a positivity ass...
We study, for a model class of classical pseudodifferential operators with symplectic characteristic...
none1noWe study the C∞-hypoellipticity for a class of double characteristic operators with symplecti...
In this work we study C (a)-hypoellipticity in spaces of ultradistributions for analytic linear part...
AbstractWe prove Gevrey regularity for a class of operators defined on the torus Tm+n, with real ana...
Abstract. We study, for a model class of classical pseudodifferential operators with symplectic char...
In this note, by analyzing the behavior at infinity of the matrix symbol of an invariant operator P ...
Fedii [1] studied hypoellipticity for operators of the form L=D21+ф(x1)2D22 in R2, and proved that L...
summary:The problems of Gevrey hypoellipticity for a class of degenerated quasi-elliptic operators a...
AbstractThe concept of characteristic manifold is very important in PDE, but it takes into account o...
AbstractA celebrated theorem of Hörmander gives a sufficient condition for a second order differenti...
AbstractThe purpose of this paper is to establish the following result. LetL1andL2be subelliptic ope...
AbstractRecently, N. Hanges proved that the operatorP=∂t2+t2Δx+∂θ(x)2 in R3 is analytic hypoelliptic...
We study C∞ and analytic hypoellipticity for an invariant class of operators with multiple ch...
Let $P(x, D)$ be a partial differential operator with principal symbol $p_m(x, \xi)=q_{m-l}(x, \xi)a...
We study the hypoellipticity of (pseudo)differential operators in one variable when a positivity ass...
We study, for a model class of classical pseudodifferential operators with symplectic characteristic...
none1noWe study the C∞-hypoellipticity for a class of double characteristic operators with symplecti...
In this work we study C (a)-hypoellipticity in spaces of ultradistributions for analytic linear part...
AbstractWe prove Gevrey regularity for a class of operators defined on the torus Tm+n, with real ana...
Abstract. We study, for a model class of classical pseudodifferential operators with symplectic char...
In this note, by analyzing the behavior at infinity of the matrix symbol of an invariant operator P ...
Fedii [1] studied hypoellipticity for operators of the form L=D21+ф(x1)2D22 in R2, and proved that L...
summary:The problems of Gevrey hypoellipticity for a class of degenerated quasi-elliptic operators a...
AbstractThe concept of characteristic manifold is very important in PDE, but it takes into account o...
AbstractA celebrated theorem of Hörmander gives a sufficient condition for a second order differenti...
AbstractThe purpose of this paper is to establish the following result. LetL1andL2be subelliptic ope...
AbstractRecently, N. Hanges proved that the operatorP=∂t2+t2Δx+∂θ(x)2 in R3 is analytic hypoelliptic...
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