Class invariants – Knowledge and References

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Published in Phillip A. Laplante, Dictionary of Computer Science, Engineering, and Technology, 2017

(3) any business rule that is a constraint on the property values of an object. Assertions may be one of three kinds: a pre-condition is any assertion that must hold before the execution of an associated operation(s); a post-condition is any assertion that must hold after the execution of the associated operation(s); and a (class) invariant is any assertion that must hold both before and after the execution of all operations. In logic programming, an assertion can be a logic expression specifying a program feature or a set of features that a program/system has to present. See also invariant, proof of correctness.

Intrapersonal heterogeneity in car-sharing decision-making processes by activity-travel contexts: A context-dependent latent class random utility – random regret model

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Published in International Journal of Sustainable Transportation, 2021

Eleni Charoniti, Jinhee Kim, Soora Rasouli, Harry J. P. Timmermans

The class-invariant utility function was specified in a linear-in-parameters formulation as follows: where is the th unit cost attribute of alternative in choice contexts The set of unit cost attributes consists of the different types of cost that each alternative involves, specifically the public transport fare, parking and fuel cost for both private and shared car and cost per km and per hour for shared car. Thus, unknown parameter represents alternative-specific effect of unit cost on choosing alternative