a:=matrix[[i+j for i in 1..4] for j in 1..4]   
      
   One can access the element i,j with   
      
   a(i,j)   
      
   But if i want a matrix of lists as   
   a:=matrix[[[i,j] for i in 1..4] for j in 1..4]   
      
   a(i,j) result to me can not return [i,j]   
      
   Where is the error? What does it mean "SUB"?   
      
   What about use as nxn matrix, list of list?   
      
   Here   
   b:=[[[i,j] for i in 1..4] for j in 1..4]   
      
   here b.i.j return [i,j]   
      
   But if with list of list one can have matrix types, why define a new type   
   Matrix?   
      
   Then i have the doubt it is better array start from 0 and not from 1   
   (but this can be always easy to solve)   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)