 Furstenberg published several papers as an undergraduate, including ""Note on one type of indeterminate form"" (1953) and ""On the infinitude of primes"" (1955).Both appeared in the ""American Mathematical Monthly", the latter provided a topological proof of Euclid's famous theorem that there are infinitely many primes.Furstenberg pursued his doctorate at Princeton University under the supervision of Salomon Bochner.