The * “International School on Combinatorics Pilar Pisón-Casares” * is jointly organized by the Department of Algebra <http://www.departamento.us.es/da> and the Mathematical Research Institute* of the University of Sevilla *(IMUS <http://www.imus.us.es/>) and will take place at the Faculty of Mathematics <http://centro.us.es/fmate> on January 25-30, 2010. The School is addressed to PhD students and young post-doc researchers working on Algebraic Geometry, Combinatorics, Commutative Algebra and related areas, introducing the participants to research, beginning from a basic level with a view towards the applications and to the most recent results. LECTURERS: Klaus Altmann (Freie Universität Berlin,Germany), Ezra Miller (Duke University,USA), Mercedes H. Rosas (Universidad de Sevilla, Spain)