We study the Vladimirov fractional differentiation operator \( {D}_N^{\alpha },\alpha >0,N\in \mathbb{Z}, \) on a p-adic ball BN = {x ∈ ℚp : |x|p ≤ pN}. To its known interpretations via the restriction of a similar operator to ℚp and via a certain stochastic process on BN, we add an interpretation in the form of a pseudodifferential operator in terms of the Pontryagin duality on the additive group of BN. We investigate the Green function of \( {D}_N^{\alpha } \) and a nonlinear equation on BN, an analog of the classical equation of porous medium.
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Published in Ukrains’kyi Matematychnyi Zhurnal, Vol. 70, No. 2, pp. 193–205, February, 2018.
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Kochubei, A.N. Linear and Nonlinear Heat Equations on a p-Adic Ball. Ukr Math J 70, 217–231 (2018). https://doi.org/10.1007/s11253-018-1496-x
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DOI: https://doi.org/10.1007/s11253-018-1496-x