
What Does It Mean to Be a Number? (The Peano Axioms)
If you needed to tell someone what numbers are and how they work, without using the notion of number in your answer, could you do it?
If you needed to tell someone what numbers are and how they work, without using the notion of number in your answer, could you do it?
Can you save the target from his assassin in a square room with bouncy walls?
Can you stack four colored cubes so that each color only shows once on each side?
Set theory is the foundation of all of mathematics. How does it handle infinity?