  We consider the solution of complex symmetric shifted linear systems. Such
systems arise in large-scale electronic structure simulations and there is a
strong need for the fast solution of the systems. With the aim of solving the
systems efficiently, we consider a special case of the QMR method for
non-Hermitian shifted linear systems and propose its weighted quasi-minimal
residual approach. A numerical algorithm, referred to as shifted QMR\_SYM($B$),
is given by the choice of a particularly cost-effective weight. Numerical
examples are presented to show the performance of the shifted QMR\_SYM($B$)
method.
