O\ {\rm is\ open}\stackrel{def}{\Leftrightarrow} \tilde{\varphi}_{\alpha}(O\cap \pi^{-1}(U_{\alpha})) {\ \rm is\ open\ in\ } \mathbf{R}^n\times GL(r;\mathbf{R})\ \forall{\alpha}
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Recent Referers:
  1. http://formula.s21g.com/?O%5C%20%7B%5Crm%20is%5C%20open%7...
  2. https://mkprob.hatenablog.com/entry/20120517/1337244082
  3. https://mkprob.hatenablog.com/
  4. http://formula.s21g.com/
  5. http://d.hatena.ne.jp/