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Questions
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What is an ideal-supporting algebra?

may 10 at 14:09 Pasha Zusmanovich 1,668●6●12

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Is there a conceptual reason why topological spaces have quotient structures while metric spaces don’t?

mar 7 at 3:25 Eric Wofsey 8,860●1●26●46

 
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The Surreal numbers satisfy all the field axioms except that its elements constitute a proper class. Is it safe to call it a field?

dec 8 at 1:57 Joel David Hamkins 74.8k●7●187●343