Cardinality of the set of decimal numerals

Full screen read https://drive.google.com/open?id=0B3YDEaOyRUwcUjljS0ZTWllCaFU

Prime numbers and irrational numbers

Full screen read
https://drive.google.com/open?id=0B3YDEaOyRUwcOW9WeGhsZU1OVjQ

On Cantor's first proof of uncountability

Full screen  https://drive.google.com/file/d/0B3YDEaOyRUwcRnZQRFpPdU44V2M/view

On the uncountability of the power set of ℕ

Hidden assumption of the diagonal argument

Which infinity for irrational numbers?

Continuous set and continuum hypothesis