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Results tagged with set-theory
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user 169902
forcing, large cardinals, descriptive set theory, infinite combinatorics, cardinal characteristics, forcing axioms, ultrapowers, measures, reflection, pcf theory, models of set theory, axioms of set theory, independence, axiom of choice, continuum hypothesis, determinacy, Borel equivalence relations, Boolean-valued models, embeddings, orders, relations, transfinite recursion, set theory as a foundation of mathematics, the philosophy of set theory.
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Can you define the absolute Galois groupoid in von Neumann–Bernays–Gödel set theory?
One difference between the absolute Galois groupoid of a field and the fundamental groupoid of a topological space is that for the former the set of objects you want to range over is not actually a se …
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