He earned a doctorate in mathematics in 1965 under Edmund Hlawka, with a dissertation entitled Rationale Approximationen Irrationaler Zahlen (Rational Approximations of Irrational Numbers). He was a professor at the University of Calgary from 1966 to 1971, then moved to the University of Karlsruhe from 1971 to 1977, and in 1978 became professor at the Graz University of Technology, where he has remained since.
He received a doctoral degree in mathematics in 1965 under Edmund Hlawka, with a thesis titled Rational Approximations of Irrational Numbers. He was an instructor at the University of Calgary from 1966 to 1971, then moved to the University of Karlsruhe from 1971 to 1977, and in 1978 became a professor at the Graz University of Technology, where he has been ever since.