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Minimal monads

Karel Čuda, Blanka Vojtášková (1987)

Commentationes Mathematicae Universitatis Carolinae

Monotonic valuations of π σ -triads and evaluations of ideals

Josef Mlček (1993)

Commentationes Mathematicae Universitatis Carolinae

We develop problems of monotonic valuations of triads. A theorem on monotonic valuations of triads of the type π σ is presented. We study, using the notion of the monotonic valuation, representations of ideals by monotone and subadditive mappings. We prove, for example, that there exists, for each ideal J of the type π on a set A , a monotone and subadditive set-mapping h on P ( A ) with values in non-negative rational numbers such that J = h - 1 ' ' { r Q ; r 0 & r 0 } . Some analogical results are proved for ideals of the types σ , σ π and...

Multiplication of nonadditive cuts in AST

Karel Čuda (1991)

Commentationes Mathematicae Universitatis Carolinae

Three complete characteristics of couples of nonadditive cuts such that J × K ̲ J t i m e s K ¯ are given. The equality J × K ¯ = J ! K is proved for all couples of nonadditive cuts. Some examples of nonadditive cuts are described.

Currently displaying 61 – 80 of 130