compactness theorem

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African Americans demonstrating for voting rights in front of the White House as police and others watch, March 12, 1965. One sign reads, "We demand the right to vote everywhere." Voting Rights Act, civil rights.

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Queen Elizabeth II addresses at opening of Parliament. (Date unknown on photo, but may be 1958, the first time the opening of Parliament was filmed.)

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compactness theorem

model theory

Learn about this topic in these articles:

model theory

In metalogic: Characterizations of the first-order logic
…theorem, there is also a compactness theorem:
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