This volume has its origins in the Research Programme on Set Theory and its Applications that took place at the Centre de Recerca Matemática (CRM) Barcelona from September 2003 to July 2004. It consists of two parts. The first contains survey papers on some of the mainstream areas of set theory, and the second contains original research papers.

The survey papers cover topics as Omega-logic, applications of set theory to lattice theory and Boolean algebras, real-valued measurable cardinals, complexity of sets and relations in continuum theory, weak subsystems of axiomatic set theory, definable versions of large cardinals, and selection theory for open covers of topological spaces. As for the research papers, they range from topics such as the number of near-coherence classes of ultrafilters, the consistency strength of bounded forcing axioms, P\kappa\lambda combinatorics, some applications of morasses, subgroups of Abelian Polish groups, adding club subsets of \omega2 with finite conditions, the consistency strength of mutual stationarity, and new axioms of set theory.

Inhalt
Survey Papers.- An ?-logic Primer.- Upper Semi-lattice Algebras and Combinatorics.- Small Definably-large Cardinals.- Real-valued Measurable Cardinals and Well-orderings of the Reals.- Complexity of Sets and Binary Relations in Continuum Theory: A Survey.- Weak Systems of Gandy, Jensen and Devlin.- Some New Directions in Infinite-combinatorial Topology.- Research Papers.- The Number of Near-Coherence Classes of Ultrafilters is Either Finite or .- Stable Axioms of Set Theory.- Forcing with Finite Conditions.- Subgroups of Abelian Polish Groups.- On the Strength of Mutual Stationarity.- Part(?, ?) and Part*(?, ?).- Local Connectedness and Distance Functions.- Bounded Martin's Maximum and Strong Cardinals.