Spectral analysis and optimization of the condition number problem. - Halisson Alberdan Cavalcanti Cardoso; Sílvio de Barros Melo; Ricardo Martins de Abreu Silva; Sidartha Azevedo Lobo de Carvalho; Silas Garrido Teixeira de Carvalho Santos; Carlos Costa Dantas (Comput. Phys. Commun., 2021)