|  |  4.4.2 bigintvec expressions 
A bigintvec expression is:
 
an identifier of type bigintvec
a function returning bigintvec
a type cast to bigintvec (see  bigintvec type cast)
 
Example:
 See
 Type conversion and casting;
 bigintvec.|  |   bigintmat m1[2][2]=1, 2, 6, 3;
  bigintvec v=m1[1,1..2];
  v;
==> 1,2
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