A criterion for hypoellipticity of second order differential operators
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Publication:1102439
zbMath0644.35023MaRDI QIDQ1102439
Publication date: 1987
Published in: Osaka Journal of Mathematics (Search for Journal in Brave)
Degenerate elliptic equations (35J70) Second-order elliptic equations (35J15) Hypoelliptic equations (35H10)
Related Items (15)
The strong maximum principle and the Harnack inequality for a class of hypoelliptic non-Hörmander operators ⋮ Criteria for hypoellipticity of differential operators ⋮ Regularity of a class of subLaplacians on the 3-dimensional torus ⋮ The uncertainty principle and hypoelliptic operators ⋮ The Boltzmann equation without angular cutoff ⋮ Lower bounds of Dirichlet eigenvalues for some degenerate elliptic operators ⋮ Propagation of holomorphic extendibility and non-hypoellipticity of the \(\bar \partial\)-Neumann problem in an exponentially degenerate boundary ⋮ Multiplicity and regularity of solutions for infinitely degenerate elliptic equations with a free perturbation ⋮ Global existence and blow-up of solutions for infinitely degenerate semilinear pseudo-parabolic equations with logarithmic nonlinearity ⋮ Hypoellipticity of certain infinitely degenerate second order operators ⋮ Large sets at infinity and Maximum Principle on unbounded domains for a class of sub-elliptic operators ⋮ Asymptotic behavior and blow-up of solutions for infinitely degenerate semilinear parabolic equations with logarithmic nonlinearity ⋮ Global existence and non-existence analyses for a semilinear edge degenerate parabolic equation with singular potential term ⋮ Hypoellipticity of Fediĭ's type operators under Morimoto's logarithmic condition ⋮ Global analytic, Gevrey and C∞ hypoellipticity on the 3-torus
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