matrix

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Across
  1. 5. a subset of a vector space which is itself a vector space
  2. 6. a single number figured with values of a matrix
  3. 7. a straight line segment whose length is magnitude and whose orientation in space is direction
  4. 8. size of matrix row by column
Down
  1. 1. 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
  2. 2. a set of certain rows and columns of a given matrix.
  3. 3. a matrix with same number of rows and columns
  4. 4. a matrix with all zeros