Algebraic Geometry: Hirzebruch 70: Proceedings of the Algebraic Geometry Conference in Honor of F. Hirzebruch's 70th Birthday, May 11-16, 1998, Stefan Banach International Mathematical Center, Warszawa, Poland

New Trends in Hopf Algebra Theory: Proceedings of the Colloquium on Quantum Groups and Hopf Algebras, La Falda, Sierras de Córdoba, Argentina, August 9-13, 1999

Differential Geometric Methods in the Control of Partial Differential Equations: 1999 AMS-IMS-SIAM Joint Summer Research Conference on Differential Geometric Methods in the Control of Partial Differential Equations, University of Colorado, Boulder, June 27-July 1, 1999

Laminations and Foliations in Dynamics, Geometry and Topology: Proceedings of the Conference on Laminations and Foliations in Dynamics, Geometry and Topology, May 18-24, 1998, SUNY at Stony Brook

Hilbert's Tenth Problem: Relations with Arithmetic and Algebraic Geometry: Relations with Arithmetic and Algebraic Geometry : Workshop on Hilbert's Tenth Problem : Relations with Arithmetic and Algebraic Geometry, November 2-5, 1999, Ghent University, Belgium

Quadratic Forms and Their Applications: Proceedings of the Conference on Quadratic Forms and Their Applications, July 5-9, 1999, University College Dublin