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In this paper, we study the expressive power and the complexity of first-order logic with arithmetic, as a query language over relational and constraint databases. We consider constraints over various domains (N, Z, Q, and R), and with various arithmetical operations ( , +, , etc.).We first consider the data complexity of first-order queries. We prove in particular that linear queries can be...
A computational modeling system (CMS) provides scientific investigators with a unified computational environment and easy access to a broad range of modeling tools. The goal of a CMS is to provide computational support that increases the efficiency of scientists in the iterative process of modeling. A CMS consists of a computational modeling environment and transparent computational support for...
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