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

94 vedi suggested the reading द्विशर in the place of द्विरस of verse 93 of Siddhānta Śekhara. The fact that Makkibhaṭṭa commented द्विरससङ्गुणं as द्विषष्टिसङगुणं shows that he did not consult Brahmasphuta Siddhānta in this place; also, he must have had a manuscript before him which scribed द्विरस in the place of द्विशर. Using श ष, स, indiscretely is not uncommon in many books of North India, from a long time and the scribe of the manuscript probably having used स in the place of श and then by an oversight a latter scribe having inverted सर as रस, Makkibhatta must have commented like that. Incidentally a remark may be made here about Makki- bhatta. He was evidently a keralite because he used letters to signify numbers as was a common practice among the Kerala Astronomers, and as he also commented upon Brihad- Bhāskarīya. Further, it is interesting to note that he wrote in his commentary under verse 39 of the Sādhanā- dhyāya of Siddhānta Śekhara viz. “भभ्रमोऽर्कमण्डलान्तरं सावनानि कुदिनानि तानिवा”, “भूमेः प्राङ्मुखी भ्रमति” etc”. This idea shows that he accepted Āryabhaṭa's verse “अनुलोम गतिः etc” implying that the earth is rotating. Bhāskara says that the Bīja correction mentioned was purely based on Āgama and Upalabdhi (meaning authority and observation'). M. M. Sudhākara Dwivedi seems to have reiterated the same as reported by Babuaji Mishra, in a foot-note. Kamalākara, condemned this Bījakarma as it was unwarranted and had no proof. A rational explanation as to why this Bīja-Karma was prescribed either by Brahmagupta himself or some autho- rity which he seems to have accepted may be given as follows. The small differences in the numbers of sidereal revolutions or what is the same the minute differences in the accepted daily motions of the planets and the assump- tion of a conjunction of all the planets and planetary points at the beginning of Kalpa, which is beyond proof,