December  UTC Evidently not so obvious as was seen by the example I provided Now you can add conditions to make your assertion true but questions remain Looking at this in the light of the article on infinitesimals is even more confusing If mathematicians dont agree which contrary to your claims of there being just a few constructivists it is hard to believe that a lay person would understand anything in this article Wikipedia  the world according to Rubin Hardy and their sidekicks Please dont try to refute this  it is undeniably true Once again that your nonnotable Wikipedia entry exists is proof of what I claim Now go ahead and just delete everything because you have the power to do so Just remember that you are turning more academics away by your intransigence and refusal to see the light