Jyotiṣa-śāstra Saṅgraha: Threefold Division, Gaṇita Methods, Muhūrta, and Planetary Reckoning
युग्मवृत्तेधनर्णश्यादोजादूनेऽधिके स्फुटम् । तद्गुणे भुजकोटिज्येभगणांशविभाजिते ॥ १०६ ॥
yugmavṛttedhanarṇaśyādojādūne'dhike sphuṭam | tadguṇe bhujakoṭijyebhagaṇāṃśavibhājite || 106 ||
Dans un cercle pair (yugma), le résultat doit être tenu pour positif ou négatif : lorsque la part impaire est déficiente on l’augmente, et lorsqu’elle est excessive on la diminue, obtenant ainsi une valeur nette (corrigée). En multipliant par celle-ci, puis en divisant par la fraction appropriée des révolutions zodiacales (bhagaṇa-aṃśa), on obtient la bhuja-jyā (sinus de la base) et la koṭi-jyā (sinus de la perpendiculaire).
Sanatkumara (in instruction to Narada on technical/Vedanga-style computation)
Vrata: none
Primary Rasa: shanta
Secondary Rasa: none
It frames precise calculation (sphuṭa—true value) as part of dharmic knowledge: correct measures and truthful computation support right ritual timing and disciplined practice, which in turn aids the pursuit of mokṣa.
Indirectly: by emphasizing accurate determination of values used in calendrical/astronomical contexts, it supports proper observance of vows and sacred timings (which are often dedicated to Viṣṇu-bhakti), ensuring devotion is practiced with correctness and steadiness.
Vedāṅga Jyotiṣa/Gaṇita: handling positive/negative results (dhana/ṛṇa), applying correction to obtain sphuṭa values, and computing bhujajyā and koṭijyā (sine components) via division by a bhagaṇa-aṃśa factor.