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

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elapsed number of solar days, for, we have construed the
one, two or three luni-Solar years as mean solar as well as
the elapsed lunations of the present year as solar months;
but this difference does not affect the computation of Adhika-
māsas as mentioned above). Then, as we are given that
15933,00000 Adhikamāsas occur in 1555200000000 solar
days of the Kalpa, if x be the number of solar days found
above, (x ✕ 1593300000) / 1555200000000 will give the number of the elapsed
Adhikamāsas. Adding these Adhikamāsas multiplied by 30,
to x the solar days obtained above, we have the Tithis elap-
sed upto the day in question. If now, we subtract the
Kshayāhās from these Tithis, we shall have the number of
Sāvanāhas or the Ahargaṇa required. Since in 1602999000000
Tithis of the Kalpa there will be 25082550000 Kshayāhas, if
y be the Tithis above obtained, (y ✕ 25082550000) / 1602999000000 will be
the Kshayāhās from the beginning of the Kalpa upto the
day in question ; subtracting these from y, we have the
required Ahargaṇa.
Verse 4. Computation of the planetary positions.
The Ahargaṇa multiplied by the number of sidereal
revolutions of a planet and divided by the number of civil
days in a Kalpa gives the planet ie its number of revolu-
tions upto the day concerned both integral and fractional.
Comm. Applying ‘Rule of three’, if in C the
number of civil days in the Kalpa, the planet makes P
sidereal revolutions how many revolutions would have been
made in A the Ahargaṇa ? The answer is (A ✕ P) / C. In this,
the integral quotient gives the number of complete revolu-
tions made; the remainder, multiplied by 12 and divided by
C again, gives the number of Rasis covered by the planet
from the Zero-point of the Zodiac, and again the remainder
multiplied by 30 and divided by C gives the number of deg-