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Commit 2021-08-13 18:20 7f5d5b9a

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feat(ring_theory): ideals in a Dedekind domain have unique factorization (#8530)

Estimated changes

Modified src/ring_theory/dedekind_domain.lean

deleted theorem fractional_ideal.mul_inv_cancel

added theorem ideal.dvd_iff_le

added theorem ideal.dvd_not_unit_iff_lt

Modified src/ring_theory/ideal/operations.lean

added theorem ideal.is_unit_iff

added theorem ideal.le_of_dvd