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

548 38. Kakṣāmaṇḍala : The deferent of a planet or the circle with the earth as centre and radius equal to 3438 units. 39. Kalā : The Hindu sine in the diurnal circle corresponding to the Sūtra (given below). 40. Kalā or Liptā : A minute of angle. 41. Kaliyuga : The period consisting of 4,32,000 mean solar years. 42. Kalpa : Dvāparayuga is twice Kaliyuga; Tretāyuga thrice and Kṛta four times. All these put together constitute a Mahāyuga. 71 Mahā- yugas make one Manvantara. Fourteen Manvantaras with what are called Sandhi periods on either side equal to a Kṛtayuga or thousand Mahāyugas make a Kalpa. The creation is supposed to last one Kalpa, which is said to constitute the day time of Brahma, the Creator. His night also is of the same duration when there is no creation. It is held that we are now in what is called Śveta-Varāha Kalpa, wherein the seventh Manvantara called Vaivasvata manvantara is current. In this Manvantara, twenty seven Mahāyugas are supposed to have elapsed and in the twenty-eighth Mahāyuga, kṛta Treta and Dvāparayugas have elapsed and that we are now in the Kaliyuga. In this Kaliyuga which began on the day when Lord Kṛṣṇa gave up his mortal coil, 5080 mean solar years have elapsed by about 21 March, 1979. 43. Kramajyā or : Hindu sine of an angle. simply jyā or Jīvā or guṇa 44. Karaṇa : Half of the duration of a tithi.