lall

lallaachaarya (720-790 E) Bhaarat ke jyotishvid aur ganitjnya the. ve shaamb ke pautr tatha bhattatrivikram ke putr the. unhone 'shishyadheevruddhidtantram' (= shishya ki buddhi badhaane wala tantr) naamak ek granth ki rachana ki. is granth ki rachana ka kaaran bataate hue lall ne swayam ko aaryabhat ka shishya bataaya hai.

isi granth mein unhone 'amaragati' (parapichual motion) ki sabse pehli likhit vyaakhya ki hai. ismein 22 adhyaaya hain. pratham 13 adhyaaya 'ganitaadhyaaya' ke antargat aate hain tatha shesh 9 adhyaaya milaakar 'golaadhyaaya' kahalaate hain. lallaachaarya ki yeh ekamaatr khagolashaastreeya kruti hai jo jeevit bachi hai.

golaadhyaaya ke saatavein adhyaaya ('mithyaajnyaaan' naamak beesavaaain adhyaaya) mein lall ne puraanon mein kahi gain anekon jyotisheeya vichaaron ki aalochna ki hai (jaise dharati ke chapati hone ka vichaar, soorya ka chandrama ke adhik nikat hona, raahu ke kaaran grahan ka hona aadi).

krutiyaaain

  • shishyadheevruddhidtantram
  • jyotishratnakosh - yeh granth 300 varshon tak Bhaarat ka sabse prasiddh jyotish granth raha.

shishyadheevruddhidtantr

is granth mein kul 22 adhyaaya hain jo do bhaagon mein vibhkt hain-

(k) ganitaadhyaaya

1. On the mean longitudes of the planets.

2. On the true longitudes of the planets.

3. On the three problems involving diurnal motion.

4. On lunar eclipses.

5. On solar eclipses.

6. On the syzygies.

7. On the heliacal settings and risings of the planets.

8. On the shadow of the moon.

9. On the lunar crescent.

10. On planetary conjunctions.

11. On conjunctions of the planets with the stars.

12. On the pāatas of the sun and moon.

13. Conclusion.

(kh) golaadhyaaya

1. On graphical representations.

2. On the construction of the celestial sphere.

3. On the principles of mean motion.

4. On the terrestrial sphere.

5. On the motions and stations of the planets.

6. On geography.

7. On erroneous knowledge.

8. On instruments.

9. On certain (selected) problems

sandarbh granth

  • Bina Chatterjee: Sisyadhivrddhidatantra of Lalla (critical edition with Commentary of Mallikarjuna Suri). 1969–1971. Indian National Science Academy, 1981.
  • Bina Chatterjee: Sisyadhivrddhidatantra of Lalla (English translation with mathematical notes). 1969–1971. Indian National Science Academy, 1981.