Several Modified DY Conjugate Gradient Methods
CHEN En
Abstract：Conjugate gradient method is a very useful method for solving unconstrained optimization prob-lems,especially for solving large-scale problems.The classical DY method can guarantee the descent and global convergence under the Wolfe line search.This paper presents four modified DY methods:Two search methods have the descent property and global convergence in the Wolfe line;the other two methods satisfy the sufficient descent without depending on the line search and have global convergence under the Wolfe line search.
Keywords：unconstrained optimizationconjugate gradient methodWolfe line searchglobal convergence
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：3( 169-171 )