It's all very well to show off your superior knowledge of mathematical subtleties but you'd need to explain how they are relevant. Something you don't do at all.
EB
And here I was, thinking that my previously posted explanation and two linked wikipedia pages would be sufficient. Apparently not, so here we go again:
Untermensche holds the position that 'in the real world' a movement cannot be of zero length. He is also of the opinion that mathematics says that because there is a smaller movement than every possible positive movement that that means that math concludes that the smallest possible movement has zero length, thus 'deriving' a contradiction between math and the real world.
I pointed out that this is wrong because, even if we accept that real movements are positive and that for every positive movement there is a smaller movement, it does not follow that the smallest possible movement has zero length.
That is because untermensche is mixing up the idea of a minimum (the smallest possible thing) with the infimum (the greatest lower bound). The infimum of all positive movements might have zero length, but that does not mean that is a movement, and we cannot say that it is the minimum movement.