The subtle definition of the ordered pair (x,y).
19:14
The strange cousin of the complex numbers -- the dual numbers.
15:17
The Kuratowski Construction of Ordered Pairs
11:31
A famous number and its logical dilemma.
25:10
What is the square root of two? | The Fundamental Theorem of Galois Theory
27:26
This open problem taught me what topology is
14:48
7. Set Theory. Order Pairs in set theory
23:43
The Most Useful Curve in Mathematics [Logarithms]
17:58