`dp_ptod'
---------

dp_ptod(POLY,VLIST)
     :: Converts an ordinary polynomial into a distributed polynomial.

RETURN
     distributed polynomial

POLY
     polynomial

VLIST
     list

   * According to the variable ordering VLIST and current type of term
     ordering, this function converts an ordinary polynomial into a
     distributed polynomial.

   * Indeterminates not included in VLIST are regarded to belong to the
     coefficient field.

     [50] dp_ord(0);
     1
     [51] dp_ptod((x+y+z)^2,[x,y,z]);
     (1)*<<2,0,0>>+(2)*<<1,1,0>>+(1)*<<0,2,0>>+(2)*<<1,0,1>>+(2)*<<0,1,1>>
     +(1)*<<0,0,2>>
     [52] dp_ptod((x+y+z)^2,[x,y]);
     (1)*<<2,0>>+(2)*<<1,1>>+(1)*<<0,2>>+(2*z)*<<1,0>>+(2*z)*<<0,1>>
     +(z^2)*<<0,0>>

References
     *Note `dp_dtop': dp_dtop, *Note `dp_ord': dp_ord.

