LCO

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LCO（Large Cantor's Ordinal）

记号	表达式
序数	${\eta }_0$
veblen函数	$\phi (3,0)$
BOCF	$\psi ({\mathrm{\Omega }}^3)/\psi ({\psi }_1({\psi }_1(0)\times 2))$
MOCF	$\psi ({\mathrm{\Omega }}^2)$
BMS	$\left(\begin{array}{cccc}0& 1& 2& 2\\ 0& 1& 1& 1\end{array}\right)=(0,0)(1,1)(2,1)(2,1)$
LPrSS	$1,5$
HPrSS	$1,3,5,7$
0-Y	$1,3,5,7$
Y序列	$1,2,4,4,4$
PSS Hydra	${\psi }_1^H({\psi }_2^H({\psi }_2^H(0)+{\psi }_2^H(0)))$
weak veblen函数	$\phi (1,0,0,0,0)$
BHM	$\left(\begin{array}{ccccccc}0& 1& 2& 1& 2& 1& 2\end{array}\right)$
BSM	$\left(\begin{array}{cccccccc}0& 1& 1& 2& 1& 2& 1& 2\end{array}\right)$
NOCF	$\psi ({\mathrm{\Omega }}_{{\omega }^3})/\psi ({\mathrm{\Omega }}_{\psi ({\psi }_1({\psi }_1({\psi }_1(0))))})$
M记号	$\psi (\psi (M+\psi (M)\times 2))$