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序数表

来自Googology Wiki
Z留言 | 贡献2025年7月2日 (三) 22:45的版本

本条目列举出一些有名字的序数,它们大多在googology中具有重大意义

需要注意的是,它们的命名很多来自googology爱好者而非专业数学研究者。

序数表

缩写 英文全称 常规表示方法(BOCF等) BMS/Y
FTO First Transfinite Ordinal ω BMS(0)(1)
LAO Linar Array Ordinal[1] ω^ω BMS(0)(1)(2)
SCO Small Cantor Ordinal φ(1,0) BMS(0,0)(1,1)
CO Cantor Ordinal φ(2,0) BMS(0,0)(1,1)(2,1)
HCO Hyper Cantor Ordinal φ(ω,0) BMS(0,0)(1,1)(2,1)(3,0)
FSO Feferman-Schutte Ordinal φ(1,0,0) BMS(0,0)(1,1)(2,1)(3,1)
SVO Small Veblen Ordinal ψ(Ω^Ω^ω) BMS(0,0)(1,1)(2,1)(3,1)(4,0)
LVO Large Veblen Ordinal ψ(Ω^Ω^Ω) BMS(0,0)(1,1)(2,1)(3,1)(4,1)
BHO Bachmann-Howard Ordinal ψ(Ω_2) BMS(0,0)(1,1)(2,2)
BO Buchholz's Ordinal ψ(Ω_ω) BMS(0,0,0)(1,1,1)
TFBO Takeuti-Feferman-Buchholz Ordinal ψ(Ω_(ω+1)) BMS(0,0,0)(1,1,1)(2,1,0)(3,2,0)
BIO Bird's Ordinal[2] ψ(Ω_Ω) BMS(0,0,0)(1,1,1)(2,1,1)(3,1,0)
EBO Extended Buchholz Ordinal ψ(I) BMS(0,0,0)(1,1,1)(2,1,1)(3,1,0)(2,0,0)
JO Jager's Ordinal ψ(Ω_(I+1)) BMS(0,0,0)(1,1,1)(2,1,1)(3,1,0)(4,2,0)
SIO Small Inaccessible Ordinal ψ(I_ω) BMS(0,0,0)(1,1,1)(2,1,1)(3,1,1)
MBO Mutiply Buchholz Ordinal ψ(I(ω,0)) BMS(0,0,0)(1,1,1)(2,1,1)(3,1,1)(3,0,0)
SRO Small Rathjen Ordinal ψ(Ω_(M+1)) BMS(0,0,0)(1,1,1)(2,1,1)(3,1,1)(3,1,0)(4,2,0)
RO Rathjen's Ordinal ψ(Ω_(K+1)) BMS(0,0,0)(1,1,1)(2,1,1)(3,1,1)(4,1,0)(5,2,0)
SSO Small Stegert Ordinal ψ(Π_ω) BMS(0,0,0)(1,1,1)(2,2,0)
LSO Large Stegert Ordinal ψ(λα.(α×2)-Π0) BMS(0,0,0)(1,1,1)(2,2,0)(3,2,0)(4,1,0)(2,0,0)
BGO TSS 1st Back Gear Ordinal[3] ψ(Π1-λα.(Ωα+2)-Π1) BMS(0,0,0)(1,1,1)(2,2,1)
SDO Small Dropping Ordinal ψ(λα.(Ωα+ω)-Π0) BMS(0,0,0)(1,1,1)(2,2,1)(3,0,0)
LDO Large Dropping Ordinal ψ(λα.(OFP aft α)-Π0) BMS(0,0,0)(1,1,1)(2,2,1)(3,2,0)
pLRO p.f.e.c. Large Rathjen Ordinal ψ(ω-π-Π0) BMS(0,0,0)(1,1,1)(2,2,2)
TSSO Trio Sequence System Ordinal ψ(ω-projection) BMS(0,0,0,0)(1,1,1,1)
QSSO Quardo Sequence System Ordinal ψ(ψH(H^H^ω))? BMS(0,0,0,0,0)(1,1,1,1,1)
SHO Small Hydra Ordinal ψ(ψH(H^^ω))? Y(1,3)
ΩSSO Ω Sequence System Ordinal Y(1,3,4,2,5,8,10)
GHO No-Go Hydra Ordinal Y(1,3,4,3)
SYO Small Yukito Ordinal ω-Y(1,4)
MHO Medium Hydra Ordinal ω-Y极限
CKO Church-Kleene Ordinal ω1CK
FUO First Uncountable Ordinal ω1
  1. 因为在googology一度经典的线性数阵的极限是它,因此得名
  2. 鸟之数阵第四版的极限是它,因此得名
  3. Bashicu对BGO的原定义是BMS(0,0,0)(1,1,1)(2,2,0)。BGO指(0,0,0)(1,1,1)(2,2,1)是中文googology社区的重命名