25 lines
589 B
Text
25 lines
589 B
Text
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import data.finset data.set
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open set
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example (A : Type) (x : A) (S H : set A) (Pin : x ∈ S)
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(Psub : S ⊆ H) : x ∈ H := Psub Pin
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open finset
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section
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override set -- set notation overrides existing one
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example (A : Type) (x : A) (S H : set A) (Pin : x ∈ S)
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(Psub : S ⊆ H) : x ∈ H := Psub Pin
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end
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-- ⊆ is now overloaded
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example (A : Type) (x : A) (S H : set A) (Pin : x ∈ S)
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(Psub : S ⊆ H) : x ∈ H := Psub _ Pin
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override set -- overrides existing notation
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example (A : Type) (x : A) (S H : set A) (Pin : x ∈ S) (Psub : S ⊆ H) : x ∈ H := Psub Pin
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