-- -*- M2-comint -*- {* hash: -1467775396 *}

i1 : A=matrix {{1, 0}, {0, 1}, {-1, -1}}

o1 = | 1  0  |
     | 0  1  |
     | -1 -1 |

              3        2
o1 : Matrix ZZ  <--- ZZ

i2 : b=vector {2,0,0}

o2 = | 2 |
     | 0 |
     | 0 |

       3
o2 : ZZ

i3 : globalSections(A,b)

o3 = {| -2 |, | -2 |, | -2 |, | -1 |, | -1 |, 0}
      | 0  |  | 1  |  | 2  |  | 0  |  | 1  |
      | 2  |  | 1  |  | 0  |  | 1  |  | 0  |

o3 : List

i4 : A=matrix {{1, 0}, {0, 1}, {-1, -1},{1,1}}

o4 = | 1  0  |
     | 0  1  |
     | -1 -1 |
     | 1  1  |

              4        2
o4 : Matrix ZZ  <--- ZZ

i5 : b=vector {2,0,0,0}

o5 = | 2 |
     | 0 |
     | 0 |
     | 0 |

       4
o5 : ZZ

i6 : globalSections(A,b)

o6 = {| -2 |, | -1 |, 0}
      | 2  |  | 1  |
      | 0  |  | 0  |
      | 0  |  | 0  |

o6 : List

i7 : globalSections(A,b,{1})

o7 = {| -2 |}
      | 2  |
      | 0  |
      | 0  |

o7 : List

i8 :