“…From the early 1970s, there has been serious attention paid to the issue of reducing the amount of storage required for the iterative methods. Several modifications of Broyden's method were given in order to reduce its computational cost; see, for example, [1,3,5,9,15,16,18,24] and references therein. The Broyden rank reduction method involves approaching the update matrix by a low-rank matrix.…”