Status of neutrino oscillation searches

The current status of neutrino oscillation searches with reactors and accelerators is reviewed. An outlook, especially on future long baseline neutrino oscillation projects, is given.Comment: 7 pages, 4 eps-figures included, needs sprocl.sty. To appear in Proc. COSMO'97, Ambleside (UK), Sep. 199

Thermally induced oscillations in fluid flow

Theoretical investigation distinguishes the various mechanisms responsible for oscillations of pressure, temperature, and flow velocity, derives a quantitative description of the most troublesome mechanisms, and develops a capability to predict the occurrence of unstable flow

Invariances in Physics and Group Theory

This is a short review of the heritage of Klein's Erlangen program in modern physics.Comment: Talk given at the Conference "Lie and Klein; the Erlangen program and its impact on mathematics and physics", Strasbourg, Sept. 201

On Dubrovin Topological Field Theories

I show that the new topological field theories recently associated by Dubrovin with each Coxeter group may be all obtained in a simple way by a ``restriction'' of the standard ADE solutions. I then study the Chebichev specializations of these topological algebras, examine how the Coxeter graphs and matrices reappear in the dual algebra and mention the intriguing connection with the operator product algebra of conformal field theories. A direct understanding of the occurrence of Coxeter groups in that context is highly desirable.Comment: 15 page

Generalized Dynkin diagrams and root systems and their folding

Graphs which generalize the simple or affine Dynkin diagrams are introduced. Each diagram defines a bilinear form on a root system and thus a reflection group. We present some properties of these groups and of their natural "Coxeter element". The folding of these graphs and groups is also discussed, using the theory of C-algebras. (Proceedings of the Taniguchi Symposium {Topological Field Theory, Primitive Forms and Related Topics}, Kyoto Dec 1996)Comment: plain tex, 7 figure