Tohoku Mathematical Journal
2000
September
SECOND SERIES VOL. 52, NO. 3

Tohoku Math. J.
52 (2000), 431-447

Title SATURATION OF THE APPROXIMATION BY SPECTRAL DECOMPOSITIONS

Dedicated to Professor Satoru Igari on his sixtieth birthday
Author Miho Tanigaki

(Received January 13, 1999)
Abstract. We shall give a saturation class for approximations by eigenfunction expansions of the Laplacian in an open domain in the Euclidean space.

1991 Mathematics Subject Classification. Primary 41A40.

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