Matrices - Puzzle crossword

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Across
  1. 4. Very simple consists of rows and columns
  2. 7. A matrix that is equal to its transpose.
  3. 8. A small determinant formed by deleting a row and column.
  4. 9. A single horizontal set of elements.
  5. 10. Matrix A matrix that, when multiplied by the original matrix, results in the identity matrix.
  6. 11. A quantity represented by a single number, used to multiply matrices.
  7. 12. Matrix Matrix where the main diagonal has 1s and other entries are 0s.
Down
  1. 1. A single vertical set of elements.
  2. 2. Flipping a matrix over its diagonal.
  3. 3. A scalar value that can be computed from the elements of a square matrix.
  4. 5. Number of rows and columns in a matrix.
  5. 6. Elements of a matrix that stretch from the top left to the bottom right.