सिद्धान्तशिरोमणि: गणिताध्याय (भास्कराचार्य - ग्रहगणित, मध्यमाधिकार व स्पष्टाधिकार सटीक)

PREFACE
From the Mathematician's point of view, Bhāskarā-
cārya's Siddhānta Śiromaṇi contains all that was beautiful
in the Ancient Hindu Astronomy. I am aware that a
translation of this work into English was done long ago
by M. M. Bapudeva Śastry and Wilkinson; but I did
not have the good fortune of having a copy in my hands
all these years. I did go through the translation once
long ago, but it gave me the impression that all the
beauties there that appeal to a Mathematician were not
brought out fully. There are, however, a good number
of Sanskrit commentaries both ancient and modern but
even they, in my humble opinion, have not done full
justice to the elucidation of Bhāskara's mathematical
genius. Further misinterpretations are not infrequent
in some of those books, as will be pointed out in the
course of this book.
What has sponsored me to undertake to write an
English commentary, (I may add that a Sanskrit
commentary also has been written by me on this work
and has been awaiting printing) is essentially that innumer-
able modern professors of Mathematics complain many
a time that there is no such a presentation of Siddhānta
Śiromaṇi in English as will enable them to assess the
Mathematical content of it in the light and language of
modern Astronomy. Hence, I have sought to produce
a fresh commentary, which I hope will meet the desire of
such professors and students of Mathematics. I may add
here that this work of mine seeks to present only the
mathematical side of Siddhānta Śiromaṇi. It is no history
of Hindu Astronomy, where the originality of the
Ancient Hindu Astronomers is sought to be evaluated.
I may confess that I am no historian.