def plot_continuation_lines(
    ax, lmbda, u_stable_reg, u_stable_osc, u_unstable_reg, u_unstable_osc
):
    """
    Plot the stable/unstable and regular/oscillatory solutions for the contiuation
    INPUT:
    ax: matplotlib axes
    lmbda: array containing the bifurcation parameter values
    u_stable_reg: infinite norm of the variable for stable and regular solutions
    u_stable_osc: infinite norm of the variable for stable and oscillatory solutions
    u_unstable_reg: infinite norm of the variable for unstable and regular solutions
    u_unstable_osc: infinite norm of the variable for unstable and oscillatory solutions"""
    ax.plot(lmbda, u_stable_reg, "-", color="blue")
    ax.plot(lmbda, u_unstable_reg, "--", color="blue")
    ax.plot(lmbda, u_stable_osc, "-", color="red")
    ax.plot(lmbda, u_unstable_osc, "--", color="red")

    return None