Table 2.

Definition of hypersurfaces in Table 1

${\mathbb{S}}_t^m(c)$ =$\{x=(x_1,\dots ,x_{m+2})\in N:x_{m+2}=\sqrt{1-(1/c)}\}$	$1\le c$
${\mathbb{S}}_{t-1}^m(c)$=$\{x\in N:x_1=\sqrt{(1/c)-1}\}$	$0<c\le 1$
${\mathbb{R}}_{t-1}^m$=$\{x\in N:x_1=x_{m+2}+a\}$	$a>0$
${\mathbb{H}}_{t-1}^m(c)$=$\{x\in N:x_{m+2}=\sqrt{1-(1/c)}\}$	$c<0$