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Dr. Gene Freudenburg is a professor in the Department of Mathematics at ÃÛÌÒÉçÇø Michigan University. 

His general research area is commutative algebra and affine algebraic geometry. He studies algebraic transformations of polynomial rings and affine spaces, with special attention to certain group actions. 

Freudenburg's papers include:

• Examples of such actions when the ring of invariants is not finitely generated, in both the linear and non-linear cases (Hilbert's 14th Problem).
• Exponential transformations of three-dimensional affine space for which an overview can be found in his book Algebraic Theory of Locally Nilpotent Derivations (Springer-Verlag, 2006).