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Nonlinear expectation : ウィキペディア英語版 | Nonlinear expectation
In probability theory, a nonlinear expectation is a nonlinear generalization of the expectation. Nonlinear expectations are useful in utility theory as they more closely match human behavior than traditional expectations. == Definition == A functional (where is a vector lattice on a probability space) is a nonlinear expectation if it satisfies: # Monotonicity: if such that then # Preserving of constants: if then Often other properties are also desirable, for instance convexity, subadditivity, positive homogeneity, and translative of constants.〔
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