ARYABHATA & BRAHMAGUPTA CONTROVERSY commentary on the Brahmasphutasiddhanta we have the privilege of presenting to the public, it is clear that in certain respects Bhaskara and others may be wrong but the Aryabhata's authenticity cannot be questioned. Pythudakasvamin while commenting on the Brahmasphutasiddhanta, XI. 26 writes: Such a mistake may have been made by Bhaskara and others; they have not understood his (Aryabhaṭa's) intention. The passage in the Mahabhaskariya giving constants of the ardharatrika system runs as follows (we are giving the translation from Kripa Shankar Shukla's edition on the Mahabhaskariya) : The astronomical processes which have been set forth above come under the sunrise day reckoning (audayika system). In the midnight day-reckoning (ardharatrika system) too. all this is found to occur: the difference that exists is being stated (below). ¹ The next fourteen stanzas relate to the midnight day- reckoning of Aryabhata I. 85 (i) Civil days and omitted lunar days in a vuga and revolution numbers of Mercury and Jupiter are thus given : (To get the corresponding elements of the midnight day-reckoning) add 300 to the number of civil days (in a yuga) and subtract the same (number) from the number. of omitted lunar days (in a yuga); and from the revolution numbers of (the sighrocca of) Mercury and Jupiter subtract 20 and 4 respectively, ª Thus according to the midnight civil days in a yuga omitted lunar days in a yuga revolution number of the sighrocca of Mercury revolution number of Jupiter 1. निबन्धः कर्मणां प्रोक्तो योऽसावौदयिको विधिः । त्वयं सर्वो यो विशेषः स कथ्यते || 2. त्रिशती भूदिने क्षेप्या इ यवमेन्यो विशोध्यते । गुर्वोभंगणेभ्योऽपि विंशतिश्च ततोऽन्यः ॥ day-reckoning, we get 1,577,917,800 25.082,280 P 17.937,000 364,220 -MBh. VII. 21 -MBh. VII. 22
