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Abstract <p>Conditions for strictly hypoellipticity and almost hypoellipticity are found for a class of linear differential operators. Conditions are given in terms of elementary center lines of symbols (characteristic polynomials) corresponding to these operators.</p>

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Strictly and Almost Hypoellipticity Criteria for Differential Operators

  • 期刊论文

  • 发表日期：

    2025年6月27日

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  • V. N. Margaryan,
  • H. G. Ghazaryan

摘要

Abstract

Conditions for strictly hypoellipticity and almost hypoellipticity are found for a class of linear differential operators. Conditions are given in terms of elementary center lines of symbols (characteristic polynomials) corresponding to these operators.