GRIGORYAN, A. B. ALGEBRAIC MULTIGRID PRECONDITIONER FOR ELLIPTIC PROBLEMS WITH MIXED TYPE BOUNDARY CONDITIONS I. TWO-GRID PRECONDITIONERS. Proceedings of the YSU A: Physical and Mathematical Sciences, Yerevan, Armenia, v. 40, n. 1 (209), p. 37–48, 2006. DOI: 10.46991/PYSU:A/2006.40.1.037. Disponível em: https://pub.ysu.am/index.php/proceedings-phys-math/article/view/vol40_no1_2006_pp037-048. Acesso em: 23 nov. 2024.