✐‹creator "Kevin Kappelmann"› section ‹Alternating Zippers› theory ML_Alternating_Zippers imports ML_Linked_Zippers begin ML‹ val pfx_sfx_nargs = ML_Gen.pfx_sfx_nargs val succ_mod_nzippers = ML_Gen.succ_mod_nzippers' val pred_mod_nzippers = ML_Gen.pred_mod_nzippers' › ML_gen_file‹alternating_zipper_morphs.ML› ML_gen_file‹alternating_zipper.ML› ML_gen_file‹sub_alternating_zipper.ML› ML_gen_file‹pair_alternating_zipper.ML› ML_gen_file‹rotate_alternating_zipper.ML› end