Terms containing negative eigenvalue

Subject	English	Russian
math.	if all the eigenvalues of a symmetric matrix are negative, then this matrix is said to be negative definite	отрицательно определённая матрица
math.	negative eigenvalue	отрицательное собственное значение
math.	the inertia of a symmetric matrix is the triple whose elements are the number of positive, negative, and zero eigenvalues, counted with multiplicities	инерция матрицы
math.	the signature of a symmetric matrix is the difference between the number of positive eigenvalues and the number of negative eigenvalues	сигнатура матрицы