Semismall perturbations, semi-intrinsic ultracontractivity, and integral representations of nonnegative solutions for parabolic equations

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dc.creatorMendez-Hernandez, Pedro J.
dc.creatorMurata, Minoru
dc.date2009-05-15
dc.date.accessioned2026-07-07T13:15:51Z
dc.date.available2026-07-07T13:15:51Z
dc.descriptionWe consider nonnegative solutions of a parabolic equation in a cylinder $D \timesI$, where $D$ is a noncompact domain of a Riemannian manifold and $I =(0,T)$ with $0 < T \le \infty$ or $I=(-\infty,0)$. Under the assumption [SSP] (i.e., the constant function 1 is a semismall perturbation of the associated elliptic operator on $D$), we establish an integral representation theorem of nonnegative solutions: In the case $I =(0,T)$, any nonnegative solution is represented uniquely by an integral on $(D \times \{0 \}) \cup (\partial_M D \times [0,T))$, where $\partial_M D$ is the Martin boundary of $D$ for the elliptic operator; and in the case $I=(-\infty,0)$, any nonnegative solution is represented uniquely by the sum of an integral on $\partial_M D \times (-\infty,0)$ and a constant multiple of a particular solution. We also show that [SSP] implies the condition [SIU] (i.e., the associated heat kernel is semi-intrinsically ultracontractive).
dc.description35 pages
dc.identifierhttps://arxiv.org/abs/0905.2617
dc.identifierhttp://arxiv.org/abs/0905.2617
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/230605
dc.subjectAnalysis of PDEs
dc.subject35C15, 35B20, 31C35, 31C12, 35J99, 35K15, 35K99, 58J99
dc.titleSemismall perturbations, semi-intrinsic ultracontractivity, and integral representations of nonnegative solutions for parabolic equations
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