The IV Iberoamerican Conference on Topology and its Applications (IV CITA) took
place in Coimbra, on April 18–21, 2001. This international meeting was attended by 79
participants, from 21 countries, and the program consisted of 8 invited lectures and 56
contributed talks, on different areas of general topology.
This was the fourth of a series of conferences that are held every two years: the first one
took place in Benicàssim, Spain, March, 1995, the second in Morelia,Mexico and the third
in Gandía, Spain. The aim of the conferences is to gather international experts on topology,
in particular Iberoamerican mathematicians.
IV CITA celebrated Prof. Bernhard Banaschewski seventy-fifth birthday. Several talks
were related to his work on general topology and order theory, with particular emphasis on
point-free topology, and several of his collaborators participated.
The conference was organized by Maria Manuel Clementino, Jorge Picado, Lurdes
Sousa, Maria João Ferreira, Gonçalo Gutierres and Dirk Hofmann, and sponsored by
the Center for Mathematics of the University of Coimbra, the Portuguese Foundation for
Science and Technology and the University of Coimbra.
This volume contains the proceedings of IV CITA, and includes twenty-one papers that
were submitted and refereed for the proceedings. We thank the referees for their valuable
collaboration on the selection and improvement of the papers.