RULE id: hexatonic and pentatonic formations (1390) SOURCE: brihaddesi_sharma_1992 (vol_II_p155) SCOPE: technical_term family, Brihaddesi (Mātaṅga ~750 CE) CONCEPT: hexatonic and pentatonic formations STATUS: empirical ASSERTIONS: - [structural] Not all amsas permit hexatonic formations; 16 amsas do not permit hexatonic formations out of 63 -- p.vol_II_p155 "Out of these 63, there are 16 amsas that do not permit hexatonic formations. Hence 63 - 16 = 47." - [structural] 33 amsas do not permit pentatonic formations out of 63 total amsas -- p.vol_II_p155 "Again there are 33 amsas that do not permit pentatonic formations. Hence 63 - 33 = 30." CITED_RULES: - hexatonic (structural) - pentatonic (structural) CONFIDENCE: empirical PROTECT: false