2007-01-26から1日間の記事一覧
Infrared divergence is more important. Their appearance is always an indication of an incorrectly chosen reference ground state. For example, if electrons in a metal attract, it is wrong to approximate them as free particles; the real grou…
Mathai-Quillen's Thom form. を Euclidean vector bundle with connection, を curvature, を tautological section, を metric の誘導する interior product とすると,