equation icon  ( )3w-1 a = b -a- , (330) m m a0 ( )3w- 1 [ ( )2(3w- 1) ( ) -4] b = c -a- + b 8rE-0 a-- + 2(1 + w)r0- a-- , (331) m m a0 m 3r0 a0 c a0