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Commit 2022-04-10 01:48 c2d870e2

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feat(set_theory/{ordinal_arithmetic, fixed_points}): Next fixed point of families (#12200) We define the next common fixed point of a family of normal ordinal functions. We prove these fixed points to be unbounded, and that their enumerator functions are normal.

Estimated changes

added theorem ordinal.le_nfp_bfamily
added theorem ordinal.lt_nfp_bfamily
added theorem ordinal.lt_nfp_family
added theorem ordinal.nfp_bfamily_fp
added theorem ordinal.nfp_bfamily_le
added theorem ordinal.nfp_family_fp
added theorem ordinal.nfp_family_le