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Commit 2022-09-08 20:32 00ab7761

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feat(ring_theory/dedekind_domain/integer_unit): define S-integers and S-units (#15646)

Estimated changes

Created src/ring_theory/dedekind_domain/S_integer.lean

added def set.integer

added theorem set.integer_eq

added theorem set.integer_valuation_le_one

added def set.unit

added theorem set.unit_eq

added def set.unit_equiv_units_integer

added theorem set.unit_valuation_eq_one

Modified src/ring_theory/subring/basic.lean

added theorem subring.coe_infi

added theorem subring.mem_infi

Modified src/ring_theory/valuation/valuation_subring.lean

added theorem valuation.mem_unit_group_iff

modified theorem valuation_subring.mem_unit_group_iff