20 lines
499 B
Text
20 lines
499 B
Text
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definition [inline] Bool : Type.{1} := Type.{0}
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variable N : Type.{1}
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variable and : Bool → Bool → Bool
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infixr `∧` 35 := and
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variable le : N → N → Bool
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variable lt : N → N → Bool
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precedence `≤`:50
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precedence `<`:50
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infixl ≤ := le
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infixl < := lt
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notation A ≤ B ≤ C := A ≤ B ∧ B ≤ C
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notation A ≤ B < C := A ≤ B ∧ B < C
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notation A < B ≤ C := A < B ∧ B ≤ C
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variables a b c d e : N
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check a ≤ b ≤ c
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check a ≤ d
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check a < b ≤ c
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check a ≤ b < c
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check a < b
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