-The octonion matrix algebra is implemented separately, as a subclass
-of CombinatorialFreeModule, to work around that issue. The custom
-class supports a scalar field that is different than the entries of
-the matrices. However, this means that we actually have FOUR
-different types of "matrices" to support:
+In contrast to the algebra of real symmetric matrices, the complex,
+quaternion, and octonion matrix algebras are implemented separately,
+as a subclasses of CombinatorialFreeModule, to work around that
+issue. The custom class supports a scalar field that is different than
+the entries of the matrices. However, this means that we actually have
+FOUR different types of "matrices" to support: