mention that array = matrix is fine too
diff --git a/doc/C03_TutorialArrayClass.dox b/doc/C03_TutorialArrayClass.dox
index e826318..0828bf3 100644
--- a/doc/C03_TutorialArrayClass.dox
+++ b/doc/C03_TutorialArrayClass.dox
@@ -129,7 +129,7 @@
it is easy to convert from one to the other with \link MatrixBase::array() .array() \endlink and
\link ArrayBase::matrix() .matrix() \endlink.
-On the other hand, assigning a matrix expression to an array expression is allowed.
+On the other hand, assigning a matrix (resp. array) expression to an array (resp. matrix) expression is allowed.
\subsection TutorialArrayClassInteropMatrix Matrix to array example
The following example shows how to use array operations on a Matrix object by employing