
Originally Posted by
enkoujin
Basic calculus from what I believe.
f(x) is the original function or maths equation. f'(x) is the derivative or transformation of f(x). f''(x) is the derivative or transformation of f'(x). Basically, each transformation with regards to differentiation changes the way the preceding equation appears on a graph. With each transformation, the graph becomes "more linear" while its predecessors are more "curvilinear". In this case, with each differentiation to the original fat man (with lots of body curves), he becomes skinnier; i.e., more linear and ripped.
The knowledge you need to know here is that e^(x) is a special equation/function because if you differentiate the function (turning it into f'(x), f''(x), f'''(x), ...), it always stays the same; i.e., f(x) = f'(x) = f''(x) = e^(x). In this case, the fat man represents e^(x) and differentiating him continuously does not change the "curves" of his physique.