Geodesic
Multiplication of nonadditive cuts in AST
Commentationes Mathematicae Universitatis Carolinae, Tome 32 (1991) no. 1, pp. 61-73.

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Three complete characteristics of couples of nonadditive cuts such that $\underline{J\times K}\neq\overline{Jtimes K}$ are given. The equality $\overline{J\times K}=J\,!\,K$ is proved for all couples of nonadditive cuts. Some examples of nonadditive cuts are described.
Classification : 03E10, 03E70, 03H05, 03H15
Keywords: alternative set theory; cuts of natural numbers; inner and outer cut of a class; inner and outer product of two cuts; logarithmical cut 
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     title = {Multiplication of nonadditive cuts in {AST}},
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Čuda, Karel. Multiplication of nonadditive cuts in AST. Commentationes Mathematicae Universitatis Carolinae, Tome 32 (1991) no. 1, pp. 61-73. http://geodesic.mathdoc.fr/item/CMUC_1991__32_1_a7/