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Results tagged with lo.logic
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user 184
first-order and higher-order logic, model theory, set theory, proof theory, computability theory, formal languages, definability, interplay of syntax and semantics, constructive logic, intuitionism, philosophical logic, modal logic, completeness, Gödel incompleteness, decidability, undecidability, theories of truth, truth revision, consistency.
8
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1
answer
635
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Explicit counter example to Vopěnka's principle in the constructible universe?
Vopěnka's principle is a large cardinal axiom which has many equivalent formulations. One of them, which I find especially appealing, is the following: if the universe is satisfies Vopěnka's principle …
- 27.5k
18
votes
Concrete example of $\infty$-categories
As per Todd's suggestion I am posting this as an answer.
The $(\infty, n)$-category of bordisms is an important example for many reasons, the most imporant of which is its role in the Baez-Dolan cob …
- 27.5k