**People, research interests, and links to personal web pages:**

**Sophie Frisch** Commutative ring theory, polynomial functions on commutative rings and non-commutative algebras, topological methods in ring theory.**Roswitha Rissner** Commutative ring thoery, linear algebra over commutative rings.**Carmelo Finocchiaro** Multiplicative ideal theory, valuation theory, spectral spaces,

abstract Riemann surfaces.**Sarah Nakat****o** (graduate student)**Amr Al-Maktry** (graduate student)- Former member: Giulio Peruginelli (U. Padova) Commutative ring theory, algebraic number theory, integer-valued polynomials

We collaborate with mathematicians in France (Marseille, Amiens), Italy (Roma Tre, U. Padova), the USA (Penn State, SUNY, Ohio State), and in Vienna and other places.