Nivṛttapravṛtta alaṅkāra = svaras pronounced in reverse bindu order, each touched for one kalā; example sā-sā-sā
Body (pseudocode)
FUNCTION is_nivrttapravrtta(seq):
IF for_each(seq.touches, duration=1_kala) AND seq.order == reverse_of_bindu:
RETURN {alankara: 'nivrttapravrtta', example: ['sa','sa','sa']}
RETURN NONE
Inputs / output
svara_sequence
—
→ alankara
Evidence (2)
p. vol_I_p055 · #2578« Having touched (a svara) for the interval of one kalā... on account of the pronunciation of (svaras) in the reverse order of bindu »