These are some mathematical jokes. They are so un-funny that they need to be explained. Hover with your mouse over the spoiler box to read it.
Greater and Less Than Zero¶
is supposed to be so close to zero that dividing it by two makes it negative. Of course, this is impossible.
The interval is part of the real numbers. Using the default measure it has a certain volume. The number of numbers within this number is the same as the continuum, . The stated cardinality of is the one of the natural numbers which are countable. No matter how small the set from the real numbers is, the numbers contained within are always uncountable. Therefore here the is so small that the real numbers in the interval become countable.