Update Gram matrix parameterization

Gram-matrix-parameterization.md

@@ -60,7 +60,7 @@ It follows that
    d\mathcal{P}(X) & = \sum_{(i, j) \in \mathcal{C}} E_{ij}\,dX^\top E_{ij} \\
                                & = \mathcal{P}(dX).
 \end{align*}
-\]
+```
 Since the subspace $C$ is transpose-invariant, we also have
 \[ \mathcal{P}(X^\top) = \mathcal{P}(X)^\top. \]
 We can now see that