User:Lériendil/Third-superparticulars and semiparticulars by prime subgroup

Some shorthand notation used here:

• Sk stands for k^2/[(k-1)(k+1)] by standard convention (the kth square superparticular).
• Gk stands for S(k-1)*Sk*S(k+1) (the kth third-particular).
• Rk stands for S(k-1)/S(k+1) (the kth semiparticular).
• Tk = Sk * S(k+1) stands for [k(k+1)/2]/[(k-1)(k+2)/2] (the kth triangle superparticular).
• Lp refers to the p-limit, i.e. the subgroup of primes less than or equal to p.
• Lp(-q) refers to the p limit with the prime q omitted: e.g. L17(-11) refers to the 2.3.5.7.13.17 subgroup; these omissions can be stacked so that L23(-5.17) refers to the group 2.3.7.11.13.19.23.

Note that not all members of Gk and Rk are superparticular. In particular, G(3k) is throdd-particular, and R(4k) is odd-particular. Such ratios will be excluded from consideration in this chart, though they will appear on companion no-twos and no-threes pages.

This list eventually aims to be complete to the 29-add-one-limit, i.e. the class of subgroups with at most one prime greater than 29, which is a superset of the 31-limit.

2- and 3-prime subgroups (2.p and 2.3.p)

Note that the following lists are complete and the insertion of higher primes will add no new inclusions to them.

2-prime subgroups (2.p)

Third-particular	Subgroup	Comma		Semiparticular	Subgroup	Comma
		Ratio	Smonzo			Ratio	Smonzo
				R3 = G4	2.5	5/4	[-2 1⟩
G4 = R3	2.5	5/4	[-2 1⟩
G5	2.7	8/7	[3 -1⟩

3-prime subgroups (2.3.p)

Third-particular	Subgroup	Comma		Semiparticular	Subgroup	Comma
		Ratio	Smonzo			Ratio	Smonzo
G7 = S4	L5	16/15	[4 -1 -1⟩	R7 = S9	L5	81/80	[-4 4 -1⟩
				R5 = T7	2.3.7	28/27	[2 -3 1⟩
G10	2.3.11	33/32	[-5 1 1⟩	R10	2.3.11	243/242	[-1 5 -2⟩

See also

• Square and triangle superparticulars by prime subgroup