Vector _ ZZ -- get a component

Vector _ ZZ -- get a component

Synopsis:

Operator: _

Input:

an instance of class Vector.

an instance of class ZZ.

v_i -- produce the i-th entry of a vector or module element v.

i1 : R = ZZ/101[a..f]



o1 = R



o1 : PolynomialRing

i2 : v = vector {a,b,c}



o2 = a*<0> + b*<1> + c*<2>



      3

o2 : R

i3 : v_1



o3 = b



o3 : R

See also:

Code:

     -- ../../../Macaulay2/m2/modules.m2:259-265
     Vector _ ZZ := (v,i) -> (
          M := class v;
          R := ring M;
          n := numgens ambient M;
          if i < 0 or i >= n then error "subscript out of range for vector";
          sendgg( ggPush v, ggINT, gg i, ggelem);
          new R)