Math 2.0

Mathematical logic and foundations Model theory: basic notions Concept

Elementary embedding

Summary

An elementary embedding is a map between two structures of the same signature that preserves and reflects the truth of every first-order formula. Its image is an elementary substructure of the target, isomorphic to the source. Elementary embeddings are the natural maps of model theory, and in set theory they are used to define large cardinals.

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Further reading

  1. Web https://en.wikipedia.org/wiki/Elementary_equivalence
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Changed2 November 2026

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