ABSTRACT
The previous five MF/IR workshops showed that the mathematical/formal results achieved in Information Retrieval (IR) could be organized into a coherent theoretical framework, that they brought new knowledge to IR, and that mathematical/formal research in IR can stand as a specialized research area of IR. Therefore the purpose of the MF/IR 2005 was to promote discussion and interaction among those with theoretical and applicative research interests in mathematical/formal aspects of Information Retrieval coming from a large spectrum of different IR fields, and also at being a forum for the presentation of both theoretical and applicative results (e.g., foundational issues; description and/or integration of models; retrieval applications; mathematical/formal techniques, properties and structures in IR; existing and/or new theories and theoretical aspects, interdisciplinary approaches) using formal and mathematical approaches like Sets, Vectors, Similarity Functions, Probability, Algebra, Topology, Metric Spaces, Geometry, Logics, Graph Theory.