Matrix Crossword By:Ramzi Karimli

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Across
  1. 2. A matrix is a rectangular array of numbers (or other mathematical objects) for which operations such as addition and multiplication are defined.
  2. 3. A submatrix of a matrix is obtained by deleting any collection of rows and/or columns.
  3. 8. A scalar is an element of a field which is used to define a vector space. A quantity described by multiple scalars, such as having both direction and magnitude, is called a vector.
  4. 9. multiplication of two matrices is defined if and only if the number of columns of the left matrix is the same as the number of rows of the right matrix.
Down
  1. 1. In the mathematical discipline of linear algebra, a triangular matrix is a special kind of square matrix. A square matrix is called lower triangular if all the entries above the main diagonal are zero.
  2. 4. The transpose of a matrix is an operator which flips a matrix over its diagonal; that is, it switches the row and column indices of the matrix A by producing another matrix, often denoted by AT (among other notations).
  3. 5. a diagonal matrix is a matrix in which the entries outside the main diagonal are all zero; the term usually refers to square matrices. Elements of the main diagonal can either be zero or nonzero.
  4. 6. If a matrix has only one row or only one column it is called a vector.
  5. 7. matrix addition is the operation of adding two matrices by adding the corresponding entries together. However, there are other operations which could also be considered addition for matrices, such as the direct sum and the Kronecker sum.
  6. 8. A square matrix is a matrix with the same number of rows and columns.