Large-Cardinal Catalogue
This is a comprehensive map of the infinite, ranked by size and "consistency strength," going from the smallest infinite sets to the absolute largest limits of mathematical thought.
- ω, the smallest infinity
- Hilbert's hotel and other toys in the playroom
- The small countable ordinals, such as ω, ω+1, …, ω·2, …, ω², …, ω^ω, …, ω^ω^ω, … up to ε₀
- Indecomposable ordinal
- ε₀ and the hierarchy of ε_α numbers
- The Feferman-Schütte ordinal Γ₀
- The Extended Veblen function
- The small Veblen ordinal
- The large Veblen ordinal
- The Bachmann-Howard ordinal
- The Takeuti-Feferman-Buchholz ordinal
- ω₁ᶜʰ = the supremum of the game values for white of the finite positions in infinite chess
- ω₁ᶜʰ,ᶜ = the supremum of the game values for white of the computable positions in infinite chess
- ω₁ᶜʰ ≅ the supremum of the game values for white of all positions in infinite chess
- The omega one of chess
- Church-Kleene ω₁ᶜᵏ, the supremum of the computable ordinals
- Admissible ordinals and relativized Church-Kleene ω₁ˣ
- λ = the supremum of the writable ordinals
- ζ = the supremum of the eventually writable ordinals
- Σ = the supremum of the accidentally writable ordinals
- The ordinals of infinite time Turing machines
- Stable ordinals
- ω₁, the first uncountable ordinal
- ℵ₀ and everything mentioned above ^
- Cardinals, infinite cardinals
- ℵ₁, the first uncountable cardinal
- Uncountable, regular and successor cardinals
- ℵ₂, the second uncountable cardinal
- ℵ_ω and singular cardinals
- Buchholz's ψ functions
- The aleph numbers and the ℵ_α hierarchy
- ℵ-fixed point
- The descriptive set-theoretic cardinals
- The bounding number b, the dominating number d, the covering numbers, additivity numbers and many more
- Cardinal characteristics of the continuum
- The continuum
- Θ
- ℶ_ω and the strong limit cardinals
- The beth numbers and the ℶ_α hierarchy
- ℶ-fixed point
- Σ_n-extendible cardinal
- 0-extendible cardinal
- Σ₂ correct and Σ_n-correct cardinals
- Correct cardinals, V_δ ≺ V and the Feferman theory
- Zermelo-Fraenkel set theory
- Con(ZFC) and Conα(ZFC), the iterated consistency hierarchy
- The minimal transitive model
- Transitive model of ZFC
- The transitive model universe axiom
- Worldly cardinal and the α-worldly hierarchy, hyper-worldly cardinal
- Morse-Kelley set theory
- Weakly inaccessible cardinal, (strongly) inaccessible cardinal
- Grothendieck universe axiom (the existence of a proper class of inaccessible cardinals)
- 1-inaccessible, the α-inaccessible hierarchy, hyper-inaccessible cardinals, Ωα-inaccessible cardinals
- Jäger's collapsing functions and ρ-inaccessible ordinals
- Σ2-reflecting, Σn-reflecting and reflecting cardinals
- Ord is Mahlo
- Pseudo uplifting cardinal, uplifting cardinal
- Σn-Mahlo cardinals, Σω-Mahlo cardinal, weakly Mahlo cardinal, (strongly) Mahlo cardinal, 1-Mahlo, the α-Mahlo hierarchy, hyper-Mahlo cardinals, Ωα-Mahlo cardinals
- The positive set theory GPK∞+
- Σn-weakly compact cardinals, Σω-weakly compact cardinal, weakly compact (=Π11-indescribable=0-Ramsey) cardinal
- Σnm- and Πnm-indescribable, totally indescribable, η-indescribable cardinals
- η-shrewd, shrewd, A-η-shrewd, A-shrewd cardinals
- Unfoldable cardinal, strongly unfoldable cardinal
- Weakly superstrong cardinal
- Strongly uplifting (=superstrongly unfoldable) cardinal
- Ethereal cardinal
- Subtle cardinal
- Weakly ineffable (=almost ineffable=genuine 0-Ramsey) cardinal, ineffable (=normal 0-Ramsey) cardinal
- n-Ramsey, genuine n-Ramsey, normal n-Ramsey, <ω-Ramsey cardinals
- The n-subtle, n-almost ineffable, n-ineffable cardinals' hierarchy
- Completely ineffable cardinal (=ω-filter property)
- Weakly Ramsey (=1-iterable) cardinal, super weakly Ramsey cardinals, ω-Ramsey cardinal
- (1-)remarkable (=virtually supercompact), virtually measurable, strategic ω-Ramsey cardinals, weak Proper Forcing Axiom
- Virtually extendible (=2-remarkable), virtually C(n)-extendible (=n+1-remarkable) cardinals, completely remarkable cardinal, Generic Vopěnka's Principle
- Virtually Shelah for supercompactness cardinal
- The n-iterable and virtually n-huge* hierarchy
- Virtually rank-into-rank cardinal
- ω-Erdős cardinal, weakly remarkable cardinal that is not remarkable
- The α-Erdős, α-iterable and (ω,α)-Ramsey hierarchy for countable infinite α
- Silver cardinal
- 0♯ (zero-sharp), existence of Silver indiscernibles
- ω1-iterable cardinal, (ω,ω1)-Ramsey cardinal
- ω1-Erdős cardinal and γ-Erdős cardinals for uncountable γ, Chang's conjecture
- Almost Ramsey cardinal
- α-weakly Erdős cardinals, greatly Erdős cardinal
- Virtually Ramsey cardinal, Jónsson cardinal, Rowbottom cardinal, Ramsey cardinal
- Ramsey M-rank
- α-Mahlo–Ramsey hierarchy
- Πα-Romsey, completely Romsey (=ω-very Ramsey), α-hyper completely Romsey, super completely Romsey cardinals
- α-filter property, α-Ramsey cardinal (for ω<α<κ), almost fully Ramsey (=<κ-Ramsey) cardinal
- Strongly Ramsey cardinal, strongly Ramsey M-rank, super Ramsey cardinal, super Ramsey M-rank
- κ-filter property, fully Ramsey (=κ-Ramsey) cardinal
- κ+-filter property, strategic (ω+1)-Ramsey cardinal, strategic fully Ramsey cardinal, ω1-very Ramsey cardinal, κ-very Ramsey cardinal
- Singular Jónsson cardinal
- Weakly measurable cardinal, measurable cardinal
- 0† (zero-dagger)
- Nontrivial Mitchell rank, o(κ)=1, o(κ)=κ++
- The θ-strong, hypermeasurability and θ-tall hierarchies, tall and strong cardinals
- Strongly tall cardinal
- Woodin cardinal
- The axiom of determinacy and its projective counterpart
- Shelah cardinal
- Superstrong cardinal, C(n)-superstrong hierarchy
- Subcompact cardinal
- The proper forcing axiom and Martin's maximum
- Indestructible weakly compact cardinal
- Nearly supercompact and nearly strongly compact cardinals
- λ-strongly compact cardinals, strongly compact cardinal
- λ-supercompact cardinals, supercompact cardinal, C(n)-supercompact cardinals
- Enhanced λ-supercompact cardinals, enhanced supercompact cardinal, λ-hypercompact cardinals, hypercompact cardinal
- Woodin for strong compactness
- α-extendible hierarchy, extendible cardinal, C(n)-extendible hierarchy
- Vopěnka scheme, Vopěnka principle, Vopěnka-scheme cardinal, Vopěnka (=Woodin for supercompactness) cardinal
- Shelah for supercompactness
- High-jump cardinal, almost high-jump cardinal, super high-jump cardinal, high-jump with unbounded excess closure cardinal
- Almost huge, huge, huge*, super almost huge, superhuge, ultrahuge, 2-superstrong cardinal
- n-fold variants of hugeness (plus C(n) variants), extendibility, supercompactness, strongness, etc…
- The wholeness axioms, axioms I4
- Rank into rank axioms (I3=E0, IEω, IE, I2=E1, Ei, I1=Eω plus m-C(n)-Ei), ω-fold variants, I0 axiom and strengthenings
- The Kunen inconsistency
- Weakly Reinhardt, Reinhardt, super Reinhardt, A-Super Reinhardt, totally Reinhardt cardinal
- Berkeley cardinal, club Berkeley, limit club Berkeley cardinal
Also see: Kunen Inconsistency, Berkeley Cardinal Hierarchy, The Expanded Large Cardinal Catalogue,