`ord'
-----

ord([VARLIST])
     :: It sets the ordering of indeterminates (variables).

RETURN
     list of indeterminates

VARLIST
     list of indeterminates

   * When an argument is given, this function rearranges the ordering
     of variables (indeterminates) so that the indeterminates in the
     argument VARLIST precede and the other indeterminates follow in
     the system's variable ordering.  Regardless of the existence of an
     argument, it always returns the final variable ordering.

   * Note that no change will be made to the variable ordering of
     internal forms of objects which already exists in the system, no
     matter what reordering you specify.  Therefore, the reordering
     should be limited to the time just after starting Asir, or to the
     time when one has decided himself to start a totally new
     computation which has no relation with the previous results.  Note
     that unexpected results may be obtained from operations between
     objects which are created under different variable ordering.

     [0] ord();
     [x,y,z,u,v,w,p,q,r,s,t,a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,_x,_y,_z,_u,_v,
     _w,_p,_q,_r,_s,_t,_a,_b,_c,_d,_e,_f,_g,_h,_i,_j,_k,_l,_m,_n,_o,
     exp(_x),(_x)^(_y),log(_x),(_x)^(_y-1),cos(_x),sin(_x),tan(_x),
     (-_x^2+1)^(-1/2),cosh(_x),sinh(_x),tanh(_x),
     (_x^2+1)^(-1/2),(_x^2-1)^(-1/2)]
     [1] ord([dx,dy,dz,a,b,c]);
     [dx,dy,dz,a,b,c,x,y,z,u,v,w,p,q,r,s,t,d,e,f,g,h,i,j,k,l,m,n,o,_x,_y,
     _z,_u,_v,_w,_p,_q,_r,_s,_t,_a,_b,_c,_d,_e,_f,_g,_h,_i,_j,_k,_l,_m,_n,
     _o,exp(_x),(_x)^(_y),log(_x),(_x)^(_y-1),cos(_x),sin(_x),tan(_x),
     (-_x^2+1)^(-1/2),cosh(_x),sinh(_x),tanh(_x),
     (_x^2+1)^(-1/2),(_x^2-1)^(-1/2)]

