Answer: T is upper triangular and Q is unitary.
- A T is diagonal
- B T is lower triangular and Q is orthogonal
- C T is upper triangular and Q is unitary
- D Q = I
Correct answer: C. T is upper triangular and Q is unitary
Explanation: Schur: every complex square matrix can be unitarily upper-triangularized: A = QTQ* where Q is unitary and T is upper triangular.
Element aij of matrix A sits at the intersection of row i and column j.
Concept context
Matrix operations, determinants, inverses, and solving linear systems