出典:Wikipedia
出典:『Wikipedia』 (2011/02/19 06:19 UTC 版)
The article should some give some historical context. For example Chern who contributed hugely to the subject, is not mentioned in the article at all, only the Chern class is mentioned once. The first useful construction was in fact the sphere bundle, in the early 40's. Chern was able to give a purely intrinsic proof of Gauss-Bonnet Formula in Integral Formulas for the Characteristic Classes of Sphere Bundles, Shiing-Shen Chern, Proceedings of the National Academy of Sciences of the United States of America, Vol. 30, No. 9 (Sep. 15, 1944), pp. 269-273, [1] —Preceding unsigned comment added by Kotika98 (talk • contribs) 03:09, 8 November 2009 (UTC)