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-rw-r--r--mathcomp/algebra/mxalgebra.v2
1 files changed, 1 insertions, 1 deletions
diff --git a/mathcomp/algebra/mxalgebra.v b/mathcomp/algebra/mxalgebra.v
index e65bc3c..7aa89b8 100644
--- a/mathcomp/algebra/mxalgebra.v
+++ b/mathcomp/algebra/mxalgebra.v
@@ -2291,7 +2291,7 @@ Lemma comm_mx_stable_eigenspace (f g : 'M[F]_n) a :
comm_mx f g -> stablemx (eigenspace f a) g.
Proof.
move=> cfg; rewrite comm_mx_stable_ker//.
-by apply/comm_mx_sym/comm_mxB => //; apply:comm_mxC.
+by apply/comm_mx_sym/comm_mxB => //; apply:comm_mx_scalar.
Qed.
End Commutation.