 |
| |||
| in the ... unknowns (system of n linear algebraic equations in the n unknowns); in ... unknown functions (this a system of two second-order elliptic equations in two unknown functions) | |||
|
относительно ... неизвестных : 4 a las frases, 2 temas |
| Electrónica | 1 |
| Matemáticas | 3 |