A comparison principle for a class of subparabolic equations in Grushin-type spaces
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We define two notions of viscosity solutions to subparabolic equations in Grushin-type spaces, depending on whether the test functions concern only the past or both the past and the future. We then prove a comparison principle for a class of subparabolic equations and show the sufficiency of considering the test functions that concern only the past.
CitationBieske, T. (2007). A comparison principle for a class of subparabolic equations in Grushin-type spaces. Electronic Journal of Differential Equations, 2007(30), pp. 1-9.
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