The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
We obtain here the complexity of solving a type of Prolog problem which Genesereth and Nilsson have called sequential constraint satisfaction. Such problems are of direct relevance to relational database retrieval as well as providing a tractable first step in analyzing Prolog problem-solving in the general case. The present paper provides the first analytic expressions for the expected complexity...