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Hironaka.Scheme.BlowUp.BlowUpAlong

The Mathlib-only effective Cartier ideal sheaves and blow-ups are the library's #

Scheme.IdealSheafData.IsEffectiveCartier and Scheme.Hom.IsBlowUpAlong (Hironaka.Scheme.BlowUp.BlowUpAlong.Defs), defined from Mathlib's notions alone, are the library's Scheme.IdealSheafData.IsInvertible and IsBlowUp: Scheme.IdealSheafData.isEffectiveCartier_iff_isInvertible and Scheme.Hom.isBlowUpAlong_iff_isBlowUp.

An effective Cartier ideal sheaf is an invertible one, in the library's sense.

π.IsBlowUpAlong I is the library's IsBlowUp I π.