Omega 0 (${\displaystyle \omega_0}$) is the first ordinal.

Infinities Infinity,Actual Infinity Omega Omega 0,Omega 0 * 2,Omega^2,Omega^^2 Greek Epsilon 0,Zeta 0,Eta 0 Bieban hierarchy Bieban hiearchy,Feferman-Schute,Ackermann Number,Small Veblen

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