% SZS status Theorem for union__LN_
% SZS output start Proof for union__LN_
  file('i/f/sptree/union__LN_c1',ch4s_sptrees_unionu_u_LNu_c1)).
  file('i/f/sptree/union__LN_c1',ah4s_sptrees_LN0)).
  file('i/f/sptree/union__LN_c1',ah4s_sptrees_unionu_u_defu_c0)).
% SZS output end Proof for union__LN_
