Matrix ^ List -- select rows

• Operator: ^

• Usage:

  f_rows

• Inputs:
  • f, a matrix, a matrix between free modules
  • rows, a list, a list of integers denoting the choice of rows
• Outputs:
  • a matrix, the submatrix of f corresponding to the rows in the list rows.

i1 : R = QQ[a..f];

i2 : p = matrix {{a,b,c},{d,e,f}}

o2 = | a b c |
     | d e f |

             2      3
o2 : Matrix R  <-- R

i3 : p^{1}

o3 = | d e f |

             1      3
o3 : Matrix R  <-- R

i4 : p^{1,0}

o4 = | d e f |
     | a b c |

             2      3
o4 : Matrix R  <-- R