Short proofs for some residual properties of free groups
The author gives short proofs of the following well-known results: 1) For any prime \(p\) the free group \(F_ n\) (\(1\leq n\leq \infty\)) is residually a finite \(p\)-group, 2) If \(S\) is an infinite set of primes then the free group \(F_ 2\) is residually \(PSL_ 2(p)\), for \(p\in S\).
scientific article; zbMATH DE number 220988