We consider some Riordan arrays related to binary words avoiding a pattern p, which can be easily studied by means of an A-matrix rather than their A-sequence. Both concepts allow...
Abstract. Agents interacting in open environments such as Internet are often in charge of personal information. In order to protect the privacy of human users, such agents have to ...
Security services in a multi-user environment are often based on access control mechanisms. Static of an access control policy can be formalised using abstract algebraic models. W...