*.environment *.cmi *.cmo *.cma *.cmx *.o *.a *.opt ring_tutor.ml fourier_tutor.ml reflexivity_tutor.ml symmetry_tutor.ml assumption_tutor.ml contradiction_tutor.ml exists_tutor.ml split_tutor.ml left_tutor.ml right_tutor.ml ring_tutor fourier_tutor reflexivity_tutor symmetry_tutor assumption_tutor contradiction_tutor exists_tutor split_tutor left_tutor right_tutor search_pattern_apply_tutor