M. V. Zubkov, “One theorem about strongly <nobr>$\eta$</nobr>-representable sets”, Izv. Vyssh. Uchebn. Zaved. Mat., 2009, Number 7,Pages <nobr>77

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Brief communications

One theorem about strongly $\eta$-representable sets

M. V. Zubkov

Chair of Algebra and Mathematical Logic, Kazan State University, Kazan, Russia

Abstract: In this paper we consider strongly $\eta$-representable sets. We prove that the union of $\Sigma^0_2$- and $\Pi^0_2$-sets is strongly $\eta$-representable.

Keywords: computability, linear order, strong $\eta$-representability.

UDC: 510.53+512.562

Received: 09.10.2008