Matrices

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Across
  1. 3. A square matrix whose elements above or below the main diagonal are all zero.
  2. 5. A diagonal matrix with ones on the main diagonal and every other element is a 0.
  3. 6. Rectangular array of numbers, arranged in rows and columns.
  4. 7. A square matrix where all the elements are zero except those on the main diagonal.
Down
  1. 1. All elements in this matrix are zero.
  2. 2. A matrix whose number of rows is equal to the number of columns.
  3. 4. The numbers that make up the matrix.