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Foundation.Modal.Maximal

Maximality of 𝐓𝐫𝐢𝐯 and 𝐕𝐞𝐫 #

𝐓𝐫𝐢𝐯 and 𝐕𝐞𝐫 are maximal in normal modal Foundation.

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        @[simp]
        theorem LO.Modal.Formula.TrivTranslation.degree_zero :
        ∀ {α : Type u_1} {p : LO.Modal.Formula α}, p.degree = 0
        @[simp]
        theorem LO.Modal.Formula.TrivTranslation.back :
        ∀ {α : Type u_1} {p : LO.Modal.Formula α}, (p) = p
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          @[simp]
          theorem LO.Modal.Formula.VerTranslation.degree_zero :
          ∀ {α : Type u_1} {p : LO.Modal.Formula α}, p.degree = 0
          @[simp]
          theorem LO.Modal.Formula.VerTranslation.back :
          ∀ {α : Type u_1} {p : LO.Modal.Formula α}, (p) = p
          theorem LO.Modal.of_classical {α : Type u_1} [DecidableEq α] {mΛ : LO.Modal.Hilbert α} {p : LO.IntProp.Formula α} :
          𝐂𝐥 ⊢! p ⊢! p