(data not available)

(-a, -sqrt(3) a) | (a, -sqrt(3) a) | ((3 a)/2, -(sqrt(3) a)/2) | (3 a, -sqrt(3) a) | ((9 a)/2, -(sqrt(3) a)/2) | (4 a, 0) | (3 a, 0) | (3 a, sqrt(3) a) | ((3 a)/2, (3 sqrt(3) a)/2) | (a, sqrt(3) a) | (0, sqrt(3) a) | (0, 0) | (-(3 a)/2, -(sqrt(3) a)/2)

13

a>0

A = 8 sqrt(3) a^2

x^_ = ((3 a)/2, 0)

J_x invisible comma x = (71 sqrt(3) a^4)/8

J_y invisible comma y = (755 a^4)/(8 sqrt(3))

J_zz = (121 a^4)/sqrt(3)

J_x invisible comma y = -(17 a^4)/8

2 a | a | sqrt(3) a | sqrt(3) a | a | a | sqrt(3) a | sqrt(3) a | a | a | sqrt(3) a | sqrt(3) a | a

p = (8 + 6 sqrt(3)) a

sqrt(21) a

s^_ = a (1/8 + sqrt(3)/8 + sqrt(21)/4 - (5 log(2))/8 - (2435 log(2))/(10976 sqrt(7)) - (15 log(3))/32 - (5459 log(3))/(10976 sqrt(7)) + (27 log(16 - 5 sqrt(7)))/(224 sqrt(7)) + 3/16 sqrt(3) log(2 + sqrt(7)) - (1279 log(2 + sqrt(7)))/(10976 sqrt(7)) + (81 log(5 + sqrt(7)))/(196 sqrt(7)) - (135 log(1 + 2 sqrt(7)))/(1568 sqrt(7)) + 3/4 log(3 + sqrt(21)) - 1/8 log(5 + sqrt(21)) - (167 log(5 + sqrt(21)))/(10976 sqrt(7)) + (167 log(6 + 7 sqrt(3) + sqrt(21 (7 + 4 sqrt(3)))))/(5488 sqrt(7)))