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We prove sharp estimates of the heat kernel associated with Fourier-Dini expansions on (0, 1) equipped with Lebesgue measure and the Neumann condition imposed on the right endpoint. Then we give several applications of this result including sharp bounds for the corresponding Poisson and potential kernels, sharp mapping properties of the maximal heat semigroup and potential operators and boundary convergence of the Fourier-Dini semigroup.
Langowski et al. (Sat,) studied this question.