Ernesto Buzano, Andrea Ziggioto
Abstract
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Abstract We describe the essential spectrum of a hypoelliptic pseudo‐differential operator which is the sum of a constantcoefficients operator and an operator with coefficients vanishing at infinity. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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Abstract We describe the essential spectrum of a hypoelliptic pseudo‐differential operator which is the sum of a constantcoefficients operator and an operator with coefficients vanishing at infinity. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Key concepts: Hypoelliptic operator, Mathematics, Differential operator, Spectrum (functional analysis), Operator (biology), Infinity, Differential (mechanical device), Mathematical analysis