Description: In the practical use of conjugate gradient method, the negative ladder is usually taken after the iteration step or + 1 step
The degree direction is used as the search direction, and we call it the re starting conjugate gradient method. This is because of the general non two times
In terms of function, the search direction produced by conjugate gradient method is no longer conjugate after step iteration
Large scale problems, often each (< or the) step re start. In addition, when the search direction
The direction of descent is also inserted into the negative gradient direction as the search direction
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