Open House for a Workshop on Global actions, groups and homotopy. Professor A Bak and two colleagues will be visiting Bangor under an ARC Scheme Dec 15-20, 1997, and a workshop will be held on the interactions of the above themes. Global actions: The algebraic counterpart of a topological space. Bak's theory introduces an algebraic concept of space with motion, which arose from K-theory considerations. A global action consists of a set X and a collection of groups acting on subsets of X. It yields a homotopy theory for algebraic structures which includes a natural, intuitive as well as rigorous concept of algebraic deformation of morphism. The aim of the workshop is to introduce these ideas and to relate them to methods of special interest at Bangor, for example algebraic models of homotopy types, homotopy coherence, higher dimensional algebra, computational aspects. All those interested are welcome, but no financial support is available. Information on accommodation in Bangor is available from the web site and participants are asked to make their own arrangements, although we will help if we can. Further information will be posted on http://www.bangor.ac.uk/ma/research/gagah/globact.htm Ronnie Brown Tony Bak Prof R. Brown, School of Mathematics, University of Wales, Bangor Dean St., Bangor, Gwynedd LL57 1UT, United Kingdom Tel. direct:+44 1248 382474|office: 382475 fax: +44 1248 383663 World Wide Web: home page: http://www.bangor.ac.uk/~mas010/ New article: Higher dimensional group theory Symbolic Sculpture and Mathematics: http://www.bangor.ac.uk/SculMath/ Mathematics and Knots: http://www.bangor.ac.uk/ma/CPM/exhibit/welcome.htm