Topology in Zfc*

Abstract

The first-order theory of linear order is far from trivia!. The monadic (secondorder) theory of linear order is much stronger. Stil~ surpr,Mng decidability results were proven in that direction. Rabin proved in [10i that the monadic theory of the rational chain is decidable. Hence the monadic theory of all countable linear orders is decidable. Biichi proved… (More)

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