nonPrincipals — Mathlib

English

Deprecated: nonPrincipals is an abbreviation for the set of nonprincipal ideals.

Русский

Устарело: nonPrincipals — сокращение множества неглавных идеалов.

LaTeX

$$@[deprecated Ideal.nonPrincipals (since := "2025-09-30")] def nonPrincipals := {I : Ideal R | ¬I.IsPrincipal}$$

Lean4

/-- `nonPrincipals R` is the set of all ideals of `R` that are not principal ideals. -/
@[deprecated Ideal.nonPrincipals (since := "2025-09-30")]
def nonPrincipals :=
  {I : Ideal R | ¬I.IsPrincipal}

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