# Talk:Tangent bundle

Not clear, what is "/xi-notation" and "/xi and dxi notation" in the original form of this article (in Comments). Maybe, "$x_i$-notation" and "$x_i$ and $dx_i$ notation"? Boris Tsirelson (talk) 13:27, 20 May 2017 (CEST)
Now I know. "Google books" asked for "Tangent bundle Voitsekhovskii"shows page 127 of the corresponding book, containing this article. These are: '$\partial/\partial x_i$-notation' and '$\partial/\partial x_i$ and $dx_i$' notation. Boris Tsirelson (talk) 13:41, 20 May 2017 (CEST)