REDLOG-Demo at IMACS-ACA'99 Title: The REDLOG Package - Tools and Applications Volker Weispfenning, University of Passau REDLOG is a REDUCE-package developed by Andreas Dolzmann and Thomas Sturm at the University of Passau, Germany. It puts a very flexible first-order logic environment on top of the computer algebra facilities of REDUCE. Special emphasis is on efficient elimination algorithms for real numbers, algebraically closed fields, and valued fields. REDLOG has numerous applications in computational geometry, automatic theorem proving, solid modeling, motion planning, control theory, simulation of networks, and optimization. The demo will outline the facilities and tools of the package with examples from these application areas. For more information consult the REDLOG homepage: http://www.fmi.uni-passau.de/~redlog/