{(-sqrt(a^2 + b^2), 0), (sqrt(a^2 + b^2), 0)}

(-sqrt(a^2 + b^2) | 0 sqrt(a^2 + b^2) | 0)

x(t) = a sec(t) y(t) = b tan(t)

x^2/a^2 - y^2/b^2 = 1

r(θ) = (a b)/sqrt(b^2 cos^2(θ) - a^2 sin^2(θ))

(for a hyperbola with center at the origin, semimajor axis a parallel to the x-axis, and semiminor axis b parallel to the y-axis)

e = sqrt(b^2/a^2 + 1)

p = b^2/sqrt(a^2 + b^2)

y = -(b x)/a ∨ y = (b x)/a

L = b^2/a

x = -a^2/sqrt(a^2 + b^2) ∨ x = a^2/sqrt(a^2 + b^2)

λ sqrt(a^2 + b^2) + λ^2

λ_1 = -sqrt(a^2 + b^2)

λ_2 = 0

v_1 = (-1, 1)

v_2 = (0, 1)

(-sqrt(a^2 + b^2) | 0 sqrt(a^2 + b^2) | 0) = P.D.P^(-1) where P = (0 | -1 1 | 1) D = (0 | 0 0 | -sqrt(a^2 + b^2)) P^(-1) = (1 | 1 -1 | 0)