@article{oai:soar-ir.repo.nii.ac.jp:00011902, author = {Kawamura, Y}, issue = {5}, journal = {PROGRESS OF THEORETICAL PHYSICS}, month = {}, note = {2013/12/9 ファイル差し替え(著者最終稿→出版社版), We construct grand unified models on an orbifold based on unphysical grand unification. The reduction to the standard model or its supersymmetric one is carried out using a variant of Parisi-Sourlas mechanism and nontrivial Z2 parity assignment., Article, PROGRESS OF THEORETICAL PHYSICS. 121(5):1049-1058 (2009)}, pages = {1049--1058}, title = {Temporary Grand Unified Theory in Unphysical World}, volume = {121}, year = {2009} }