A block upper triangular splitting method for solving block three-by-three linear systems arising from the large indefinite least squares problem. - Jun Li; Kailiang Xin; Lingsheng Meng (Appl. Math. Comput., 2025)

Alternating direction implicit iterative method for solving indefinite least squares problem. - Lingsheng Meng; Peizhe Li; Kailiang Xin (Appl. Math. Lett., 2025)

Block-splitting preconditioners for indefinite least squares problem. - Kailiang Xin; Lingsheng Meng (Comput. Appl. Math., 2025)

Variable parameter Uzawa method for solving the indefinite least squares problem. - Lingsheng Meng; Kailiang Xin; Jun Li 054 (Numer. Algorithms, 2025)