* encapsulation of individual linear operators into blocked linear
* operator variants.
*
- * @note The LinearOperator facility obsoletes some of the @ref Matrix2
- * "derived matrix" classes, such as BlockDiagonalMatrix, IterativeInverse,
- * ProductMatrix, ScaledMatrix, ProductSparseMatrix,
- * InverseMatrixRichardson, SchurMatrix, ShiftedMatrix,
- * ShiftedMatrixGeneralized, TransposeMatrix
- *
* @note As explained below, when using LinearOperator as <code>res = op_a*x</code>
* a PackagedOperation class instance is generated behind-the-curtains.
* Consequently, the user program has to include header files for both classes
* by default. Note that (P)Arpack supports other transformations, but currently
* this class implements only shift-and-invert mode.
*
- * The <code>OP</code> can be specified either using auxiliary Shift class together
- * with IterativeInverse or by using LinearOperator
+ * The <code>OP</code> can be specified by using a LinearOperator:
* @code
* const double shift = 5.0;
* const auto op_A = linear_operator<vector_t>(A);