Adjust latex documentation

Author: Q-Minh

source/pbat/fem/LaplacianMatrix.h

@@ -132,7 +132,7 @@ struct SymmetricLaplacianMatrix
     MatrixX deltag; ///< `|# element nodes| x |# element nodes * # quad.pts.|` matrix of element
                     ///< laplacians at quadrature points
     int dims; ///< Dimensionality of image of FEM function space, i.e. this Laplacian matrix is
-              ///< actually \f$ L \kronecker I_{dims \times dims} \f$. Must have `dims >= 1`.
+              ///< actually \f$ L \otimes I_{d} \f$. Must have `dims >= 1`.
 };
 
 template <CMesh TMesh>

source/pbat/fem/LoadVector.h

@@ -91,9 +91,7 @@ struct LoadVector
                ///< (IntegratedShapeFunctions()).
     Eigen::Ref<MatrixX const> detJe; ///< `|# element quadrature points|x|# elements|` matrix of
                                      ///< jacobian determinants at element quadrature points
-    int dims; ///< Dimensionality of image of FEM function space, i.e. this load vector is
-              ///< actually \f$ \mathbf{f} \kronecker 1_{dims \times dims} \f$. Should have `dims >=
-              ///< 1`.
+    int dims; ///< Dimensionality of external loading. Should have `dims >= 1`.
 };
 
 template <CMesh TMesh, int QuadratureOrder>