Computational Geometry Column 41

The recent result that n congruent balls in R^d have at most 4 distinct geometric permutations is described.Comment: To appear in SIGACT News and in Internat. J. Comput. Geom. App

Computing the GIT-fan

We present an algorithm to compute the GIT-fan of algebraic torus actions on affine varieties.Comment: minor changes; to appear in Internat. J. Algebra Compu

Hyers-Ulam-Rassias Stability of Generalized Derivations

The generalized Hyers--Ulam--Rassias stability of generalized derivations on unital Banach algebras into Banach bimodules is established.Comment: 9 pages, minor changes, to appear in Internat. J. Math. Math. Sc

Highlight of Dubna-SPIN97 Workshop

A summary of the Workshop on High Energy Spin Physics (Dubna-SPIN97), Dubna, 7-12 July 1997, is given.Comment: Latex, sprocl.sty included, 8 pages. Talk at 13-th Internat. Symposium on High Energy Spin Physics, Protvino, 8-12 Sept 1998. Will appear in Proceedings (World Sci. PC). A misprint in title is correcte