`alg'
-----

alg(I)
     :: Returns a root which correspond to the index I.

RETURN
     algebraic number (`root')

I
     integer

   * Returns `#I', a root.

   * Because `#I' cannot be input directly, this function provides an
     alternative way: input `alg(I)'.

     [2] x+#0;
     syntax error
     0
     [3] alg(0);
     (#0)

Reference
     *Note `newalg': newalg, *Note `algv': algv

