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

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of signs is to be correlated with the modern. We have
from the formula derived out of PZS, A = S + B.
According to modern convention when δ is north, it will be
taken to be positive and when a is to the north of the East
point it also will be taken to be positive so that, (1) when
δ is north and a north, A = S+B ie. B = A-S; this accords
with the Hindu convention namely ‘सौम्येऽन्तरम्’ (2) when
δ is south and a south, - A = S - B so that B = A + S;
this also accords with the Hindu convention, namely
याम्ये योग: (3) But, however, when δ is north and a
south ie. when the Sun having northern declination comes
to the south of the prime-Vertical, A = S - B so that
B = S - A. This accords with the Hindu convention
if only we take B = | A-S | when δ is north.
Bhāskara makes two statements at the end of the
commentary under this verse namely that when δ is south
and A > 2431, there will be no Koṇa-Śaṅku and that
when δ is north and s > 17'' - 5''' there will be four
Koṇa-Śaṅkus. We have to verify these statements. The
first statement is evident because H sin (Agrā) > H sin 45°