3-2 Pythagoras and the Pythagoreans It must be borne in mind that there exist no primary sources covering early Greek mathematics, and that we rely chiefly on manuscripts and accounts dating from Arabiau and Christian times. With great ingenuity and patience, scholars of classicism have reliably restored many of the origi- texts, such as those of Euclid, Apollonius, Archimedes, and others. From painstaking criticism, from remarks by later commentators, and from text many fragments and scattered notices by later authors and philosophers, some sort of consistent, although largely hypothetical, account of the history of early Greek mathematics is now known. A debt is owed, along these lines, to the profound and scholarly investigations of such men as Paul Tannery, T. L. Heath, H. G. Zeuthen, A. Rome, J. L. Heiberg, and E. Frank.