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

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The Dinādya may be also obtained from the beginning
of the Kali, which begins with Friday. The Dhruvas
calculated for the commencement of the solar year are to
be added to the planetary positions at the beginning of the
Kali, in the event of computing the Ahargaṇa and thereby
the planetary positions from the beginning of the Kaliyuga
for the sake of convenience.
Comm. The Dinādya at the commencement of Kali
is Zero, since the number of civil days during the length
of time equal to a Kaliyuga is integral and equal to
157791645 according to Brahmagupta and Bhaskara who
follows him. The Suryasiddhānta, it may be noted here,
gives the number of days in a Kaliyuga as not integral
but equal to 157791782.8. Hence the Dinādya computed
from the beginning of the Kali is to be increased by .8 to
obtain its value according to Suryasiddhānta. The plane-
tary positions at the commencement of Kali were given
by Bhaskara already.
Verse 12. The number of what are called Kshepadinās
to obtain the Ahargaṇa.
Hereafter Bhaskara is going to obtain the planetary
positions for any day during the current solar year having
obtained the Dhruvakas or the planetary positions for the
beginning of the Solar year. In that behalf the Ahargaṇa
or the collection of days which have elapsed from the
commencement of the Solar year is to be found. This
Ahargaṇa is obtained by subtracting the number of Ksha-
yāhās from the number of tithis that have elapsed. In
finding these Kshayāhās, we have to take note that there
is a little remnant of Kshayāhās at the beginning of the
Solar year which is also to be taken into account while
computing the number of Kshayāhās during the course of
the year. In other words, the number of Kshayāhās that
are going to be computed during the course of the year,
for the elapsed part of the year will be in default of the