Gibbs phenomenon for Fourier partial sums on Zp

초록

It is of interest to know whether the Gibbs phenomenon occurs on a local field. A p-adic Heaviside function on the group of p-adic integers is defined as an analogy of real variable Heaviside function and it is also shown that there exists the Gibbs phenomenon with an undershoot of at least 1/(p + 1) as an approximate level. As a consequence of the theorem, we see that the Fourier partial sum for a Heaviside function does not converge at the point of discontinuity. (C) 2015 Elsevier Inc. All rights reserved.

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