Max Cooper - Aleph 2 (Official Video by Martin Krzywinski)

Some light, coffee reading "Cardinality of the continuum" [1]: in short, the cardinality of real numbers (ℝ) is often called the cardinality of the continuum, and denoted by 𝔠 or 2^ℵ_0 or ℶ_1 (beth-one [2); whereas, interestingly [3], the cardinality of the integers (ℤ) is the same as the cardinality of the natural numbers (ℕ) and is ℵ_0 (aleph-null) [perhaps what was meant initially?]. Related: the Schröder–Bernstein theorem [4], "if there exist injective functions f : A → B and g : B → A between the sets A and B, then there exists a bijective function h : A → B.". Not related, but great: Max Cooper (sound) and Martin Krzywinski (visuals) did a splendid job visualising "ℵ_2" [5]. [1] link [2] link [3] "Cardinalities and Bijections - Showing the Natural Numbers and the Integers are the same size", link [4] link [5] "Max Cooper - Aleph 2 (Official Video by Martin Krzywinski)", ▶ this video