DEGENERATE CASE IN INVESTIGATING CRITICAL POINTS IN TWOVARIABLE ECONOMIC OPTIMIZATION PROBLEMS. Innovations in Science and Technologies, [S. l.], v. 3, n. 6, p. 623–630, 2026. Disponível em: https://innoist.uz/index.php/ist/article/view/1654. Acesso em: 3 jul. 2026.