Blar i ODA Open Digital Archive på forfatter "van den Berg, Benno"
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The strength of countable saturation
van den Berg, Benno; Briseid, Eyvind Martol; Safarik, Pavol (Journal article; Peer reviewed, 2017)In earlier work we introduced two systems for nonstandard analysis, one based on classical and one based on intuitionistic logic; these systems were conservative extensions of first-order Peano and Heyting arithmetic, ...