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Results tagged with internal-set-theory
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user 28128
5
votes
1
answer
411
views
Constructive compactness for countable models?
The compactness theorem for countable (Tarski?) models is equivalent to the weak König's lemma by a result of H. Friedman and others as noted here, in the context of classical logic. The weak König's …
- 16.6k
2
votes
0
answers
264
views
Comparison of model-theoretic and axiomatic approaches to NSA
This question is motivated by the discussion in the comments to this
post. The question concerns
a comparison of model-theoretic (extension) approaches to nonstandard
analysis, and axiomatic (syntact …
- 16.6k