Heroicjay: I have never met a more obstinate fool than you. Indeed you are duller than most and I see no point in carrying on any exchanges with you.  

 Wikipedia: 
 In addition to the nonsense you write in this article, there is more nonsense in other math articles. Actually your math articles are referred to as the WikiMath joke articles. 
 Your infinitesimal article states: "...an infinitesimal, or infinitely small number, is a number that is greater in absolute value than zero yet smaller than any positive real number.." - This is such incoherent and illogical garbage for the first part implies it is a positive real number and the second part that it is zero. How can it be both zero and a small positive real number? I leave you to break your stupid heads over this.