Hans StephaniHans Stephani gained his diploma, Ph.D. and Habilitation at the Friedrich-Schiller-Universität Jena. He became Professor of Theoretical Physics in 1992, before retiring in 2000. He has been lecturing in theoretical physics since 1964 and has publishe numerous papers and articles on relativity and optics. He is also the author of four books. Read More Read Less
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