BROWER, Cole Rubin; PONOMARENKO, Vadim. On the Monotonicity of the Number of Positive Entries in Nonnegative Four Element Matrix Powers. The PUMP Journal of Undergraduate Research, [S. l.], v. 3, p. 26–36, 2020. DOI: 10.46787/pump.v3i0.2233. Disponível em: https://journals.calstate.edu/pump/article/view/2233. Acesso em: 3 jul. 2024.