Overview: Reinforces basic principles with new research, techniques, and applications.Simplifies advanced theories and problems.Features insight into a broad domain of research.New applications, research, and fundamental theories in nonlinear analysis are presented in this book. Each chapter provides a unique insight into a large domain of research focusing on functional equations, stability theory, approximation theory, inequalities, nonlinear functional analysis, and calculus of variations with applications to optimization theory. ..Topics include: .Fixed point theory.Fixed-circle theory.Cou
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