This edition of Books IV to VII of Diophantus' Arithmetica, which are
extant only in a recently discovered Arabic translation, is the
outgrowth of a doctoral dissertation submitted to the Brown University
Department of the History of Mathematics in May 1975. Early in 1973, my
thesis adviser, Gerald Toomer, learned of the existence of this
manuscript in A. Gulchln-i Macanl's just-published catalogue of the
mathematical manuscripts in the Mashhad Shrine Library, and secured a
photographic copy of it. In Sep- tember 1973, he proposed that the study
of it be the subject of my dissertation. Since limitations of time
compelled us to decide on priorities, the first objective was to
establish a critical text and to translate it. For this reason, the
Arabic text and the English translation appear here virtually as they
did in my thesis. Major changes, however, are found in the mathematical
com- mentary and, even more so, in the Arabic index. The discussion of
Greek and Arabic interpolations is entirely new, as is the
reconstruction of the history of the Arithmetica from Diophantine to
Arabic times. It is with the deepest gratitude that I acknowledge my
great debt to Gerald Toomer for his constant encouragement and
invaluable assistance.