Talk:Kite's color notation: Difference between revisions

@@ Line 22: / Line 22: @@
 How does color notation name subgroups that use non-primes like 2.9.21 if you don't have names like ya, za etc for non-primes? Would saying "wa 2nd plus zo 4th" be okay? [[User:IlL|IlL]] ([[User talk:IlL|talk]]) 05:29, 8 July 2020 (UTC)
+Good question. I've struggled with this. Your approach seems promising! For 2.9.21 I would say "nowa plus wa 2nd plus zo 4th", to make it explicit that 2 is present and 3 is not. In other words, nowa by itself means 2-limit, and noca by itself means no-twos 3-limit. Then we use your method to add on the non-primes. 3.4 would be noca plus wa 4th. I'm not sure about 4.6, would it be nowaca plus wa 5th plus double wa 8ve? Or maybe nowaca plus wa 5th plus wa 11th?
+With 2.9.21, the wa 7th is also a generator, and could replace wa 2nd. The zo 4th could be replaced by the zo 3rd, because 21/(2*9) = 7/6. Or even by the zo 2nd 28/27. There should be a canonical form, so that one subgroup doesn't get two names. Perhaps we could have a convention that the odd limit be as small as possible? And as a tie-breaker, e.g. for w2 vs w7, minimize the degree? Thus 2.9.21 would be nowa plus wa 2nd plus zo 3rd.
+.7.9 would be "za nowa plus wa 2nd". 2.3.7/5 would be "wa plus zogu". No need to say zogu 5th, since any zogu interval could be a generator, as could any ruyo interval. Or perhaps because 2.3.5 is ya not yawa, we can simply call this zogu? --[[User:TallKite|TallKite]] ([[User talk:TallKite|talk]]) 11:55, 22 July 2020 (UTC)