The gliding humps technique for 𝐹𝐾-spaces

Bennett, G.

doi:10.1090/S0002-9947-1972-0296564-9

The gliding humps technique for $FK$-spaces
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Trans. Amer. Math. Soc. 166 (1972), 285-292 Request permission

Abstract:

The gliging humps technique has been used by various authors to establish the existence of bounded divergent sequences in certain summability domains. The purpose of this paper is to extend these results and to obtain analogous ones for sequence spaces other than c and m. This serves to unify and improve many known results and to obtain several new ones—applications include extensions to theorems of Dawson, Lorentz-Zeller, Snyder-Wilansky and Yurimyae. Improving another result of Wilansky allows us to consider countable collections of sequence spaces—applications including the proof of a conjecture of Hill and Sledd and extensions to theorems of Berg and Brudno. A related result of Petersen is also considered and a simple proof using the Baire category theorem is given.

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FK-spaces containing

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