\brief Returns an expression of the tridiagonal matrix T in the decomposition * * \returns expression object representing the matrix T

\returns the value of the matrix at position \a i, \a j * This function returns Scalar(0) if the element is an explicit \em zero */

\returns a const pointer to the array of the starting positions of the inner vectors. * This function is aimed at interoperability with other li

\sa MatrixBase::setIdentity() */

FIXME here we could return an expression of the sum

Preallocates \a reserveSize non zeros. * * Precondition: the matrix must be in compressed mode. */

\returns a const pointer to the array of inner indices. * This function is aimed at interoperability with other libraries. * \sa valuePtr(

\returns a const pointer to the array of values. * This function is aimed at interoperability with other libraries. * \sa innerIndexPtr(),

To use for operations with the transpose of Q

\brief Retruns the z-translation by value. **/

\returns the number of jacobian evaluation */

\returns the number of functions evaluation */

Swaps the values of \c *this and \a other. * Overloaded for performance: this version performs a \em shallow swap by swaping pointers and attrib