1.0.2 `plucker_relation'
------------------------

plucker_relation(L,M)
     ::  Returns the plucker relation defined by the index sets L
     and M.

RETURN
     quote

L
     List

M
     List

   * L is the index set of the plucker relations and M is the index set
     of the plucker relations.

     [297] A = plucker_relation([1,2],[3,4,5,6]);
     quote(y_1_2_3*y_4_5_6-y_1_2_4*y_3_5_6+y_1_2_5*y_3_4_6-y_1_2_6*y_3_4_5)
     [298] eval_str(print_terminal_form(A));
     y_4_5_6*y_1_2_3-y_3_5_6*y_1_2_4+y_3_4_6*y_1_2_5-y_3_4_5*y_1_2_6

