% SZS status Theorem for NULL0_
% SZS output start Proof for NULL0_
  file('i/f/list/NULL0_c0',ch4s_lists_NULL0u_c0)).
  file('i/f/list/NULL0_c0',ah4s_lists_NULLu_u_DEFu_c0)).
  file('i/f/list/NULL0_c0',ah4s_bools_TRUTH)).
% SZS output end Proof for NULL0_
