Sparse Representation, Convex Optimization, and Low-Rank Representation for Clustering Analysis

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Sparse Representation, Convex Optimization, and Low-Rank Representation for Clustering Analysis

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Sparse representation, convex optimization, and low-rank representation are widely used methods in clustering analysis. Sparse representation helps identify key features within data, typically implemented through L1-norm minimization techniques such as LASSO or orthogonal matching pursuit (OMP) algorithms. Convex optimization enables finding globally optimal solutions efficiently using methods like interior-point algorithms or alternating direction method of multipliers (ADMM), which are crucial for solving large-scale clustering problems. Low-rank representation aids in dimensionality reduction by capturing the inherent structure of data through techniques like singular value decomposition (SVD) or nuclear norm minimization, effectively reducing computational complexity while preserving essential patterns. These methods play vital roles in clustering analysis by enhancing feature selection, optimization stability, and computational efficiency.