Commit 2023-06-14 15:16 b5e74661

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feat: port Analysis.Complex.OpenMapping (#5050)

Estimated changes

Modified Mathlib.lean

Created Mathlib/Analysis/Complex/OpenMapping.lean

added theorem AnalyticAt.eventually_constant_or_nhds_le_map_nhds

added theorem AnalyticAt.eventually_constant_or_nhds_le_map_nhds_aux

added theorem AnalyticOn.is_constant_or_isOpen

added theorem DiffContOnCl.ball_subset_image_closedBall