fix

Mathlib/LinearAlgebra/Multilinear/Basic.lean

@@ -152,7 +152,7 @@ protected theorem map_smul [DecidableEq ι] (m : ∀ i, M₁ i) (i : ι) (c : R)
 theorem map_coord_zero {m : ∀ i, M₁ i} (i : ι) (h : m i = 0) : f m = 0 := by
   classical
     have : (0 : R) • (0 : M₁ i) = 0 := by simp
-    rw [← update_eq_self i m, h, ← this, f.map_smul, zero_smul R (M := M₂)]
+    rw [← update_eq_self i m, h, ← this, f.map_smul, zero_smul R (A := M₂)]
 
 @[simp]
 theorem map_update_zero [DecidableEq ι] (m : ∀ i, M₁ i) (i : ι) : f (update m i 0) = 0 :=