MultidimensionalMatrix _ Sequence -- get entry of multidimensional matrix

Synopsis

Operator: _
Usage:

M_l
Inputs:
- M, a multidimensional matrix, an $n$-dimensional matrix.
- l, a sequence, a sequence of $n$ nonnegative integers.
Outputs:
- a ring element, the $l$-th entry of the matrix $M$ (note that indexes start from 0).

Description

i1 : M = genericMultidimensionalMatrix {2,3,2}

o1 = {{{a     , a     }, {a     , a     }, {a     , a     }}, {{a     ,
         0,0,0   0,0,1     0,1,0   0,1,1     0,2,0   0,2,1       1,0,0 
     ------------------------------------------------------------------------
     a     }, {a     , a     }, {a     , a     }}}
      1,0,1     1,1,0   1,1,1     1,2,0   1,2,1

o1 : 3-dimensional matrix of shape 2 x 3 x 2 over ZZ[a     ..a     ]
                                                      0,0,0   1,2,1

i2 : M_(1,2,0)

o2 = a
      1,2,0

o2 : ZZ[a     ..a     ]
         0,0,0   1,2,1