PROBLEMS LEADING TO THE CONCEPT OF A MATRIX AND METHODS OF THEIR SOLUTION. European Journal of Pedagogical Initiatives and Educational Practices, [S. l.], v. 3, n. 2, p. 32–36, 2025. Disponível em: https://europeanscience.org/index.php/4/article/view/1205. Acesso em: 7 nov. 2025.