2007-10-25 Gendron, The External Fundamental Group of an Algebraic Number Field math http://jp.arxiv.org/abs/0710.4514 他には, http://jp.arxiv.org/abs/math/0506519 http://jp.arxiv.org/abs/math/0506509 http://jp.arxiv.org/abs/math/0506275 http://jp.arxiv.org/abs/math/0506270