abs(x)<=a/2 and abs(y)<=b/2
(-a/2, -b/2) | (a/2, -b/2) | (a/2, b/2) | (-a/2, b/2)
4
a>0 and b>0
sqrt(a^2 + b^2) | sqrt(a^2 + b^2)
b
A = a b
x^_ = (0, 0)
J_x invisible comma x = (a b^3)/12
J_y invisible comma y = (a^3 b)/12
J_zz = 1/12 a b (a^2 + b^2)
J_x invisible comma y = 0
r_x = b/(2 sqrt(3)) r_y = a/(2 sqrt(3))
K = 1/3 a^3 b (1 - (192 a sum_(n=1)^∞ tanh((π b (2 n - 1))/(2 a))/(2 n - 1)^5)/(π^5 b))
a | b | a | b
p = 2 (a + b)
R = 1/2 sqrt(a^2 + b^2)
sqrt(a^2 + b^2)
χ = 1