Apastamba Sulba-sutra [sanskrit]
29,967 words
The Sanskrit edition of the Apastamba Sulba-sutra with the commentaries of Kapardin, Karavinda and Sundararaja. The Sulbasutras are considered Vedic appendices and deals with the ancient Indian science of Mathematics and Geometry, by instructing the construction of fire-altars, among others. Original titles: Āpastambaśulbasūtra (आपस्तम्बशुल्बसूत्र), Kapardin (कपर्दिन्), Karavinda (करविन्द), Sundararāja (सुन्दरराज)
Sutra 21.4a
prākṛtau vakrau pakṣau saṃnataṃ pucchaṃ vikāraśravaṇāt || Sūtra _21.4a ||
prakṛtyāṃ bhavau prākṛtau / tāveva pakṣau vakrīkartavyau / kutaḥ? vikāraśravaṇāt /
sannataṃ pucchaṃ -- pucchaṃ ca sannataṃ kartavyam /
vaktapakṣo vyastapuccha iti vikāraḥśrūyate /
pakṣapucchānāṃ ca vaktatā vyastatā ca prakṛtau nāsti /
tasmādvikāratvaṃ pakṣapucchānām //