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A continuously varying family of vector spaces of the same dimension over a topological space. If the vector spaces are one-dimensional, the term line bundle is used and has the associated tag line-bundles.

8 votes
Accepted

Does it make sense to define a holomorphic structure on $\mathbb{C}P^\infty$ and vector bund...

Yes, there is lots of literature on this subject. However, Tyurin proved that all vector bundles on $CP^\infty$ are direct sum of line bundles. There are several more recent papers by Penkov and Tikho …
Misha Verbitsky's user avatar
2 votes

Projectively flat Hermitian curvature proportional to Kähler form?

The curvature form of any bundle is closed by Bianchi identity, hence your form $s\omega$ is necessarily closed. This implies that $s=const$, unless $dim_C M=1$, because $ds\wedge \omega=0$ implies $ …
Misha Verbitsky's user avatar
5 votes

Extending vector bundles from subvarieties

An obvious obstruction comes from topology: the Chern classes of your bundle should be obtained from restriction of Hodge classes on an ambient variety. This is (more or less) enough to extend a smoo …
Misha Verbitsky's user avatar
3 votes

top chern class

Take a Hopf surface $H$, projected to ${\Bbb C}P^1$ with fibers elliptic curves, and let $L=\pi^* O(1)$ be a pullback of $O(1)$ from ${\Bbb C}P^1$ to $H$. Since $H=S^3\times S^1$, all line bundles are …
Misha Verbitsky's user avatar