Fun Mathematics

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Across
  1. 2. A number in the matrix
  2. 6. The elements on the diagonal of this matrix are 1, and the rest are zero.
  3. 7. The element in this square matrix are all zero except the main diagonal
Down
  1. 1. Name for matrix with equal number rows and columns
  2. 3. A rectangular array of numbers within brackets
  3. 4. In this square matrix, all the elements either above or below the main diagonal elements are zero
  4. 5. Number of rows x number of columns