ℵ₀

#aleph null #aleph naught #aleph zero symbol #cardinality #infinite set #countable infinity #cantor #transfinite number

🏨ℕ₀

#hilbert's hotel #aleph null #paradox #countable infinity #thought experiment #infinity paradox #set theory

∞₀

#aleph null #aleph zero #smallest infinity #countable infinity #cardinality #set theory #transfinite number

🏨♾️🔑

#hilbert's hotel #infinite hotel paradox #countable infinity #aleph zero #thought experiment #infinite rooms