REDUCTION THEOREMS FOR DISCRETE HARDY OPERATOR ON MONOTONE SEQUENCE CONES (0. Journal of Mathematics Mechanics and Computer Science, [S. l.], v. 128, n. 4, p. 12–24, 2025. DOI: 10.26577/JMMCS202512842. Disponível em: https://bm.kaznu.kz/index.php/kaznu/article/view/1750. Acesso em: 5 jul. 2026.