Normal bundle to $Z$ in $Y$ is a manifold with same dimension as $Y$ (Exercise 2.3.12 of Guillemin-Pollack)











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Here we have $l > k$. I let $phi : U times mathbb R^l longrightarrow N(Z;mathbb R^M)$ be the associated parametrization. I thought that to restrict $U times mathbb R^l$ to $U times mathbb R^k$ one should consider the projection map $pi : U times mathbb R^l longrightarrow U times mathbb R^k$. I'm not sure how that helps though, because I thought I needed to prove that the restricted parametrization $pivert_{U times mathbb R^k}$ maps $U times mathbb R^k$ onto $N(Z;Y)$.










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    enter image description here



    Here we have $l > k$. I let $phi : U times mathbb R^l longrightarrow N(Z;mathbb R^M)$ be the associated parametrization. I thought that to restrict $U times mathbb R^l$ to $U times mathbb R^k$ one should consider the projection map $pi : U times mathbb R^l longrightarrow U times mathbb R^k$. I'm not sure how that helps though, because I thought I needed to prove that the restricted parametrization $pivert_{U times mathbb R^k}$ maps $U times mathbb R^k$ onto $N(Z;Y)$.










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      favorite









      up vote
      1
      down vote

      favorite











      enter image description here



      Here we have $l > k$. I let $phi : U times mathbb R^l longrightarrow N(Z;mathbb R^M)$ be the associated parametrization. I thought that to restrict $U times mathbb R^l$ to $U times mathbb R^k$ one should consider the projection map $pi : U times mathbb R^l longrightarrow U times mathbb R^k$. I'm not sure how that helps though, because I thought I needed to prove that the restricted parametrization $pivert_{U times mathbb R^k}$ maps $U times mathbb R^k$ onto $N(Z;Y)$.










      share|cite|improve this question













      enter image description here



      Here we have $l > k$. I let $phi : U times mathbb R^l longrightarrow N(Z;mathbb R^M)$ be the associated parametrization. I thought that to restrict $U times mathbb R^l$ to $U times mathbb R^k$ one should consider the projection map $pi : U times mathbb R^l longrightarrow U times mathbb R^k$. I'm not sure how that helps though, because I thought I needed to prove that the restricted parametrization $pivert_{U times mathbb R^k}$ maps $U times mathbb R^k$ onto $N(Z;Y)$.







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