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 consider semigroups of transformations (partial mappings defined on a set $$A$$ A ) closed under the set-theoretic intersection of mappings treated as subsets of $$A\times A$$ A × A . On such semigroups we define two relations: the relation of semicompatibility which identifies two transformations at the intersection of their domains and the relation of semiadjacency when the...
We consider two relations on a ∩-semigroup of partial functions on a given set: the inclusion of domains and semiadjacency (i.e., the inclusion of the image of the first function in the domain of the second). These are characterized from an abstract point of view via a system of elementary axioms, i.e., conditions expressed in the language of pure predicate calculus with equality.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.