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Introduce the subuniverse P (#828)
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EgbertRijke authored Oct 10, 2023
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Expand Up @@ -40,7 +40,8 @@ open import foundation.universe-levels

The **Regensburg extension** of the
[fundamental theorem of identity types](foundation.fundamental-theorem-of-identity-types.md)
asserts that for any [pointed](structured-types.pointed-types.md)
asserts that for any [subuniverse](foundation.subuniverses.md) `P`, and any
[pointed](structured-types.pointed-types.md)
[connected type](foundation.connected-types.md) `A` equipped with a type family
`B` over `A`, the following are
[logically equivalent](foundation.logical-equivalences.md):
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