Ring of real numbers #1586
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Ring of real numbers #1586
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Co-authored-by: Fredrik Bakke <[email protected]>
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FYI. I've noticed that you usually write proofs using the additive unit element at universe level zero. The large structure of a ring should probably have an additive unit element at each universe level so it is still possible to extract the ring at universe level |
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My best attempt to deal with this is in #1587 ; we can postpone this one until afterwards. |
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Marking this as a draft; I think we'll probably go ahead and build all the way to large fields here, with fields needing an additional apartness relation to describe nonzero/invertible elements. |
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Just at universe level 0 for now; still working up to large rings.