ब्राह्मस्फुटसिद्धान्त (ब्रह्मगुप्त - शून्य, कुट्टक, बीजगणित एवं सम्पूर्ण २१ अध्याय सान्वय सटीक)

ALGEBRA GOES TO EUROPE FROM INDIA 191
Towards the close of his treatise on Algebra, Bhāskara
II informs us, that it is compiled and abridged from
the more diffuse works on the same subject, bearing
the names Brāhme (meaning no doubt Brahmagupta),
Śrīdhara and Padmanābha; and in the body of his
treatise, he has cited a passage of Śrīdhara's algebra
and another of Padmanābha. He repeatedly adverts
to preceding writers and refers to them in general
terms, where his commentators understand him to
allude to Āryabhaṭa, to Brahmagupta to the latter's
scholiast Caturveda Pṛthūdaka Svāmī and to the other
writers above mentioned.
Most, if not all, of the treatises, to which he thus
alludes, must have been extant, and in the hands of
his commentators, when they wrote; as appears from
their quotations of them; more especially those of
Brahmagupta and Āryabhaṭa, who are cited, and
particularly the first mentioned, in several instances.
A long and diligent research in various parts of India,
has, however, failed of recovering any part of the
Padmanābha Bīja (or the algebra of Padmanābha) and
of the algebraic and other works of Āryabhaṭa.
But the translator has been more fortunate in regard
to the works of Śrīdhara and Brahmagupta, having in
his collection Śrīdhara's compendium of arithmetic,
and a copy incomplete however, of the text and
scholia of Brahmagupta's Brahmasiddhānta comprising
among other no less interesting matter, a chapter
treating of arithmetic and mensuration; and another,
the subject of which is algebra : both of them fortu-
nately complete. The commentary is a perpetual one;
successively quoting in length each verse of the text;
proceeding to the interpretation of it, word by word;
and subjoining elucidations and remarks; and its colo-
phon, at the close of each chapter, gives the title
of the work and the name of the author. Now the
name which is there given, Caturveda Pṛthudaka
Svāmī, is that of a celebrated scholiast of Brahmagupta,
frequently cited as such by the commentaries of