@@ -166,15 +166,11 @@ total
166166vectInjective2 : {xs, ys : Vect n a} -> {x, y : a} -> x :: xs = y :: ys -> xs = ys
167167vectInjective2 {x=x} {y=x} {xs=xs} {ys=xs} refl = refl
168168
169−total
170−vectLemma : {xs, ys : Vect n a} -> {x, y : a} -> x = y -> xs = ys -> x :: xs = y :: ys
171−vectLemma {xs=xs} {ys=xs} {x=x} {y=x} refl refl = refl
172−
173169total
174170vectDecEq : DecEq a => (x1 : Vect n a) -> (x2 : Vect n a) -> Dec (x1 = x2)
175171vectDecEq [] [] = Yes refl
176172vectDecEq (x :: xs) (y :: ys) with (decEq x y, vectDecEq xs ys)
177− vectDecEq (x :: xs) (x :: xs) | (Yes eqHd, Yes eqTl) = Yes (vectLemma eqHd eqTl)
173+ vectDecEq (x :: xs) (x :: xs) | (Yes refl, Yes refl) = Yes refl
178174 vectDecEq (x :: xs) (y :: ys) | (_, No nEqTl) = No (\p => nEqTl (vectInjective2 p))
179175 vectDecEq (x :: xs) (y :: ys) | (No nEqHd, _) = No (\p => nEqHd (vectInjective1 p))
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