Changes in Version 1.11

• Fixed some bugs.
• Changed the parameter lists of solvers in modules ITERSOLV and MLSOLV as well as of preconditions in modules PRECOND.
• Extended the structure of the type QMatrix for storage of null space information for singular matrices.
• Adopted the iterative solvers to systems of equations with a singular matrix.
• Corrected the implementation of the Chebyshev method.
• Extended the estimation of eigenvalues to preconditioned matrices.
• Revised the LASPack error handling.
• Introduced the symbolic names for variables of the types Vector, Matrix, and QMatrix.
• Thoroughly revised the manual.