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Questions that are about research in mathematics, or about the job of a research mathematician, without being mathematical problems or statements in the strictest sense. Do not use this tag for easy or supposedly easy mathematical questions.

13 votes

What are some important but still unsolved problems in mathematical logic?

One of the very interesting open problems in Logic (and CS) I think: Is the field of constructible numbers known to be decidable?
Saeed Salehi's user avatar