stylistic:style_transfer, linguistic:paraphrasing
Hyperbolic cylinder

If A and B have different signs and ρ ≠ 0 {\displaystyle \rho \neq 0}, we obtain the hyperbolic cylinders, whose equations may be rewritten as: (x a) 2 − (y b) 2 = 1. {\displaystyle \left({\frac {x}{a}}\right)^{2}-\left({\frac {y}{b}}\right)^{2}=1.}