.. in Section 1.1 ... of Thomas H. Barr's textbook of Vector Calculus... in chapter one.. in section 1.1 ... in that section... the number "2" denotes.. especially very especially the Rebecca Raskolnikov of the 2 1/2 hour medusa-ultron second pilot episode.. the number "0".. denotes.. Rebecca Svigardlov of the lengthy.. extremely, extremely, extremely lengthy issue #752 .. 21 Jump Street era... and.. the number "4" denotes.. Holly Madison.. as one of the very first cast-members of 21 Jump Street.. even before Nikita Bellucci was part of the cast.. the very first original episodes.. when in the opening cast credits you saw Holly Madison and a very sad, quiet, reflective animated... Cobra Commander.. sob sob sob sob...