Matrices and Determinants

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Across
  1. 1. A matrix with a determinant equal to zero
  2. 5. Each number or function inside a matrix
  3. 6. A matrix obtained by interchanging rows and columns
  4. 10. A rectangular arrangement of numbers or functions
  5. 12. The determinant of a smaller matrix, used in cofactors
Down
  1. 2. The matrix which, when multiplied with the original, gives the identity matrix
  2. 3. A vertical line of elements in a matrix
  3. 4. A special number calculated from a square matrix
  4. 7. A horizontal line of elements in a matrix
  5. 8. A quantity used to multiply a matrix
  6. 9. The number of rows and columns in a matrix
  7. 11. A square matrix with 1’s on the diagonal and 0’s elsewhere