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2. On ⋆-associated comonotone functions
- Creator:
- Hutník, Ondrej and Pócs, Jozef
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- comonotone functions, binary operation, ⋆-associatedness, and Sugeno integral
- Language:
- English
- Description:
- We give a positive answer to two open problems stated by Boczek and Kaluszka in their paper \cite{BK}. The first one deals with an algebraic characterization of comonotonicity. We show that the class of binary operations solving this problem contains any strictly monotone right-continuous operation. More precisely, the comonotonicity of functions is equivalent not only to +-associatedness of functions (as proved by Boczek and Kaluszka), but also to their ⋆-associatedness with ⋆ being an arbitrary strictly monotone and right-continuous binary operation. The second open problem deals with an existence of a pair of binary operations for which the generalized upper and lower Sugeno integrals coincide. Using a fairly elementary observation we show that there are many such operations, for instance binary operations generated by infima and suprema preserving functions.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public