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Unfoldable cardinal

Index Unfoldable cardinal

In mathematics, an unfoldable cardinal is a certain kind of large cardinal number. [1]

19 relations: Axiom of constructibility, Cardinal number, Critical point (set theory), Elementary equivalence, Equiconsistency, Indescribable cardinal, Inner model, Joel David Hamkins, Journal of Symbolic Logic, Large cardinal, Mathematics, Ordinal number, Power set, Proper forcing axiom, Ramsey cardinal, Strong cardinal, Supercompact cardinal, Weakly compact cardinal, Zermelo–Fraenkel set theory.

Axiom of constructibility

The axiom of constructibility is a possible axiom for set theory in mathematics that asserts that every set is constructible.

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Cardinal number

In mathematics, cardinal numbers, or cardinals for short, are a generalization of the natural numbers used to measure the cardinality (size) of sets.

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Critical point (set theory)

In set theory, the critical point of an elementary embedding of a transitive class into another transitive class is the smallest ordinal which is not mapped to itself.

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Elementary equivalence

In model theory, a branch of mathematical logic, two structures M and N of the same signature σ are called elementarily equivalent if they satisfy the same first-order σ-sentences.

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Equiconsistency

In mathematical logic, two theories are equiconsistent if the consistency of one theory implies the consistency of the other theory, and vice versa.

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Indescribable cardinal

In mathematics, a Q-indescribable cardinal is a certain kind of large cardinal number that is hard to describe in some language Q. There are many different types of indescribable cardinals corresponding to different choices of languages Q. They were introduced by.

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Inner model

In set theory, a branch of mathematical logic, an inner model for a theory T is a substructure of a model M of a set theory that is both a model for T and contains all the ordinals of M.

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Joel David Hamkins

Joel David Hamkins is an American mathematician and philosopher based at the City University of New York.

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Journal of Symbolic Logic

The Journal of Symbolic Logic is a peer-reviewed mathematics journal published quarterly by Association for Symbolic Logic.

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Large cardinal

In the mathematical field of set theory, a large cardinal property is a certain kind of property of transfinite cardinal numbers.

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Mathematics

Mathematics (from Greek μάθημα máthēma, "knowledge, study, learning") is the study of such topics as quantity, structure, space, and change.

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Ordinal number

In set theory, an ordinal number, or ordinal, is one generalization of the concept of a natural number that is used to describe a way to arrange a collection of objects in order, one after another.

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Power set

In mathematics, the power set (or powerset) of any set is the set of all subsets of, including the empty set and itself, variously denoted as, 𝒫(), ℘() (using the "Weierstrass p"),,, or, identifying the powerset of with the set of all functions from to a given set of two elements,.

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Proper forcing axiom

In the mathematical field of set theory, the proper forcing axiom (PFA) is a significant strengthening of Martin's axiom, where forcings with the countable chain condition (ccc) are replaced by proper forcings.

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Ramsey cardinal

In mathematics, a Ramsey cardinal is a certain kind of large cardinal number introduced by and named after Frank P. Ramsey.

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Strong cardinal

In set theory, a strong cardinal is a type of large cardinal.

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Supercompact cardinal

In set theory, a supercompact cardinal is a type of large cardinal.

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Weakly compact cardinal

In mathematics, a weakly compact cardinal is a certain kind of cardinal number introduced by; weakly compact cardinals are large cardinals, meaning that their existence cannot be proven from the standard axioms of set theory.

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Zermelo–Fraenkel set theory

In mathematics, Zermelo–Fraenkel set theory, named after mathematicians Ernst Zermelo and Abraham Fraenkel, is an axiomatic system that was proposed in the early twentieth century in order to formulate a theory of sets free of paradoxes such as Russell's paradox.

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References

[1] https://en.wikipedia.org/wiki/Unfoldable_cardinal

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