11:32

Real Analysis | ℝ and P(ℕ)

21:16

Real Analysis | The countability of the rational numbers.

18:34

Real Analysis | Open subsets of ℝ.

19:14

The strange cousin of the complex numbers -- the dual numbers.

16:30

Real Analysis | The density of Q and other consequences of the Axiom of Completeness.

16:14

Real Analysis | The limit point of a set A⊆ℝ

22:48

Cardinality of the Continuum

19:22

Using topology for discrete problems | The Borsuk-Ulam theorem and stolen necklaces