% SZS status Theorem for NEGATION__NORMAL__FORM_
% SZS output start Proof for NEGATION__NORMAL__FORM_
  file('i/f/Past_Temporal_Logic/NEGATION__NORMAL__FORM_c6',ch4s_Pastu_u_Temporalu_u_Logics_NEGATIONu_u_NORMALu_u_FORMu_c6)).
  file('i/f/Past_Temporal_Logic/NEGATION__NORMAL__FORM_c6',ah4s_Temporalu_u_Logics_NOTu_u_SWHEN)).
% SZS output end Proof for NEGATION__NORMAL__FORM_
