Education
He attended school in Bratislava, and then Charles University in Prague.
He attended school in Bratislava, and then Charles University in Prague.
In 1968, he was involved in politics in Czechoslovakia, supporting the political movement that sought to humanize Communist rule during the Prague Spring. Štefan feared that he would be in danger if he returned, and he decided to stay in Britain. He remained in Warwick, where he studied for a Doctor of Philosophy which was awarded in 1973.
His thesis was on Accessibility and singular foliations, a topic which is important in control theory and in the mathematical theory of entropy.
He died while climbing Tryfan on June 18, 1978.