a}}$]{}; (0.0,-.0) node [$0$]{}; (0.00,-.0) node [$\dfrac{0}{{a}}$]{};      (0,-0.0) node [${c}_{0}$]{}; (0,-0.0) node [${c}_{0}$]{}; (0.0,-0.0) node [${c}_{0}$]{}; (0.00,-0.0) node [${c}_{0}$]{};  -   Case 0(i): ${\pazocal{C}}_{\gamma}$ is a hyperbola and $\gamma 