A new multi-step Tseng-type external gradient algorithm for inertial regularization is constructed by viscous iteration in Hilbert space. The algorithm is used to solve hierarchical variational inequality problems with fixed point problems of semi-contractive mappings. Under appropriate restrictions, the strong convergence theorem of the iterative sequence generated by the algorithm is proved, and two numerical examples are given to illustrate the effectiveness of the algorithm. The findings extand and refine the existing theory of hierarchical variational inequalities and fixed points.
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