sadratnamaala

sadratnamaala ka pratham prusht

sadratnamaala (= sad + ratnamaala = 'sachche ratnon ki maala') shankar varman dvaara san 1819 mein sanskrut mein rachit khagol aur ganit ka granth hai. shankar varman keraleeya ganit sampradaaya ke khalogashaastri evam ganitjnya the.

yadyapi is granth ki rachana ke samay tak pashchimi ganit aur jyotishshaastr Bhaarat mein bhi pahunch gaya tha, tathaapi yeh granth poornat: usi paaramparik shaili mein likhi gayi hai jismein Kerala ganiteeya sampradaaya ke ganitjnya likhte aa rahe the. shankar varman ne is granth ka vistrut bhaashya bhi likha jo malayalam mein hai.

yeh pustak 6 prakaranon (adhyaaya) mein vibhkt hai jinmein kul 212 shlok hain.

prakaran 1 : ankon ke naam diye hain ; yog, ghataana, guna, bhaag, varg karna, vargamool nikaalna, ghan karna tatha ghanamool nikaalne ke kul 8 sankriyaaon ki paribhaasha ki gaii hai.

prakaran 2 : is adhyaaya mein maapan ki vibhinn ikaaiyaaain (samay ki ikaaiyaaain, kon, chaandr-diwas, grah evam taare, panchaang, lambaai, dhaanya (grain) ke bhaar, mudra (money) tatha dishaaeain)

prakaran 3 : trairaashik niyam (rule of three) ki paribhaasha, panchaang evam iske avayavon ki ganana

prakaran 4 : chaap tatha jya (arcs and sines) aur khagoleeya maapanon evam gananaaon mein inka upayog

prakaran 5 : chhaaya, grahan, vyatipaat, retrograde motion of the planets and apses of the moon.

prakaran 6 : nishchit kaalaavadhi ke baad khagoleeya niytaankon ke maan ko sanskaarit (revision) karne ki aavashyakta, parahit-karan ka varnan

sandarbh