Zariski had been working on the fundamental group of the complement of an algebraic curve .
Zariski had found generators and relations for the fundamental group but was unable to show that Zariski had found sufficient relations to give a presentation for the group .
Zariski had been working on the fundamental group of the complement of an algebraic curve , and he had found generators and relations for the fundamental group but was unable to show that he had found sufficient relations to give a presentation for the group .