Abstract
The sets of type $H^{(s)}$ form an important subclass of the class of sets of uniqueness ($U$-sets) for trigonometrical series. The main aim of this note is to present a proof of an unpublished result of P. \v Sleich which asserts that each set of type $H^{(s)}$ is $\sigma$-bilaterally porous.
Citation
L. Zajíček. "An Unpublished Result of P. \v Sleich: Sets of Type H(s) are σ-bilaterally porous." Real Anal. Exchange 27 (1) 363 - 372, 2001/2002.
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