From 21b2e3dd981072dceba18cdaa5d950f2ae31b470 Mon Sep 17 00:00:00 2001
From: Danila Fedorin <danila.fedorin@gmail.com>
Date: Tue, 23 Jun 2026 11:49:45 -0500
Subject: [PATCH] Rename longest_chain to longestChain for convention

---
 lean/Spa/Isomorphism.lean        | 10 +++++-----
 lean/Spa/Lattice.lean            |  4 ++--
 lean/Spa/Lattice/AboveBelow.lean |  2 +-
 lean/Spa/Lattice/Prod.lean       | 16 ++++++++--------
 lean/Spa/Lattice/Unit.lean       |  2 +-
 5 files changed, 17 insertions(+), 17 deletions(-)

diff --git a/lean/Spa/Isomorphism.lean b/lean/Spa/Isomorphism.lean
index 161a8bd..ed15ba8 100644
--- a/lean/Spa/Isomorphism.lean
+++ b/lean/Spa/Isomorphism.lean
@@ -13,13 +13,13 @@ def FiniteHeightLattice.transport {α β : Type*} [Lattice α] [Lattice β]
   bot := f ⊥
   top := f ⊤
   height := I.height
-  longest_chain :=
+  longestChain :=
     { series :=
-        I.longest_chain.series.map f
+        I.longestChain.series.map f
           (hf.strictMono_of_injective (Function.LeftInverse.injective hgf))
-      head_series := congrArg f I.longest_chain.head_series
-      last_series := congrArg f I.longest_chain.last_series
-      length_series := I.longest_chain.length_series }
+      head_series := congrArg f I.longestChain.head_series
+      last_series := congrArg f I.longestChain.last_series
+      length_series := I.longestChain.length_series }
   chains_bounded := fun c =>
     I.chains_bounded
       (c.map g (hg.strictMono_of_injective (Function.LeftInverse.injective hfg)))
diff --git a/lean/Spa/Lattice.lean b/lean/Spa/Lattice.lean
index d3d67d3..1ed2cdf 100644
--- a/lean/Spa/Lattice.lean
+++ b/lean/Spa/Lattice.lean
@@ -58,7 +58,7 @@ structure PointedLTSeries (α : Type*) (f t : α)(n : ℕ) [Preorder α] where
 
 class FiniteHeightLattice (α : Type*) [Lattice α] extends Bot α, Top α where
   height : ℕ
-  longest_chain : PointedLTSeries α ⊥ ⊤ height
+  longestChain : PointedLTSeries α ⊥ ⊤ height
   chains_bounded : BoundedChains α height
 
 namespace FixedHeight
@@ -70,7 +70,7 @@ theorem bot_le [FiniteHeightLattice α] : ∀ (a : α), ⊥ ≤ a := by
   by_cases heq : ⊥ ⊓ a = ⊥
   · exact inf_eq_left.mp heq
   · exfalso
-    have lc := FiniteHeightLattice.longest_chain (α := α)
+    have lc := FiniteHeightLattice.longestChain (α := α)
     have hlt : ⊥ ⊓ a < lc.series.head := by
       rw [lc.head_series]
       exact lt_of_le_of_ne inf_le_left heq
diff --git a/lean/Spa/Lattice/AboveBelow.lean b/lean/Spa/Lattice/AboveBelow.lean
index ca425ed..737bfd8 100644
--- a/lean/Spa/Lattice/AboveBelow.lean
+++ b/lean/Spa/Lattice/AboveBelow.lean
@@ -273,7 +273,7 @@ instance [Inhabited α] : FiniteHeightLattice (AboveBelow α) where
   bot := bot
   top := top
   height := 2
-  longest_chain :=
+  longestChain :=
     { series :=
         ((RelSeries.singleton _ bot).snoc (mk default)
             (by rw [RelSeries.last_singleton]; exact bot_lt_mk default)).snoc top
diff --git a/lean/Spa/Lattice/Prod.lean b/lean/Spa/Lattice/Prod.lean
index f4f2ba6..454f2f9 100644
--- a/lean/Spa/Lattice/Prod.lean
+++ b/lean/Spa/Lattice/Prod.lean
@@ -68,25 +68,25 @@ instance prod [A : FiniteHeightLattice α] [B : FiniteHeightLattice β] :
   bot := ((⊥ : α), (⊥ : β))
   top := ((⊤ : α), (⊤ : β))
   height := A.height + B.height
-  longest_chain :=
+  longestChain :=
     { series :=
         RelSeries.smash
-          (A.longest_chain.series.map (fun a => (a, (⊥ : β)))
+          (A.longestChain.series.map (fun a => (a, (⊥ : β)))
             (fun _ _ h => Prod.mk_lt_mk_iff_left.mpr h))
-          (B.longest_chain.series.map (fun b => ((⊤ : α), b))
+          (B.longestChain.series.map (fun b => ((⊤ : α), b))
             (fun _ _ h => Prod.mk_lt_mk_iff_right.mpr h))
-          (by simp [A.longest_chain.last_series, B.longest_chain.head_series])
+          (by simp [A.longestChain.last_series, B.longestChain.head_series])
       head_series :=
         (RelSeries.head_smash _).trans
           ((LTSeries.head_map _ _ _).trans
-            (congrArg (·, (⊥ : β)) A.longest_chain.head_series))
+            (congrArg (·, (⊥ : β)) A.longestChain.head_series))
       last_series :=
         (RelSeries.last_smash _).trans
           ((LTSeries.last_map _ _ _).trans
-            (congrArg ((⊤ : α), ·) B.longest_chain.last_series))
+            (congrArg ((⊤ : α), ·) B.longestChain.last_series))
       length_series := by
-        show A.longest_chain.series.length + B.longest_chain.series.length = _
-        rw [A.longest_chain.length_series, B.longest_chain.length_series] }
+        show A.longestChain.series.length + B.longestChain.series.length = _
+        rw [A.longestChain.length_series, B.longestChain.length_series] }
   chains_bounded := fun c => by
     obtain ⟨c₁, c₂, -, -, -, -, hlen⟩ := LTSeries.exists_unzip c
     have h₁ := A.chains_bounded c₁
diff --git a/lean/Spa/Lattice/Unit.lean b/lean/Spa/Lattice/Unit.lean
index 7aa48cf..8567c2f 100644
--- a/lean/Spa/Lattice/Unit.lean
+++ b/lean/Spa/Lattice/Unit.lean
@@ -22,7 +22,7 @@ instance : FiniteHeightLattice PUnit where
   bot := PUnit.unit
   top := PUnit.unit
   height := 0
-  longest_chain := { series := RelSeries.singleton _ PUnit.unit, head_series := refl _, last_series := refl _, length_series := refl _ }
+  longestChain := { series := RelSeries.singleton _ PUnit.unit, head_series := refl _, last_series := refl _, length_series := refl _ }
   chains_bounded := boundedChains_of_subsingleton PUnit 0
 
 end Spa