（*Pa/ppos), of Alexandria, the name of one of the later Greek geometers, of whom we know absolutely nothing, beside his works, except the fact that Suidas states him to have lived under Theodosius (A. D. 379-395). From an epigram of the second century, or a little later, in which one Pappus is lauded, Reiske thought that this must be the geometer, who ought, therefore, to be placed in the latter half of the second century. And Harless remarks, in confirmation, that of all the authors named by Pappus, no one is known to have flourished later than the second century.
This is but poor evidence, and, on the other hand, the authority of Suidas is by no means of the first order on a point of chronology. We may, therefore, look to other sources of probability, and the only one we can find at all to the purpose is as follows.
Pappus has left a short comment upon a portion of the fifth book of Ptolemy's Syntaxis: or rather of the comment which Suidas states him to have written upon f