# Is a holomorphic vector bundle on a projective variety locally trivial in the Zariski topology?

By the GAGA principle we know that a holomorphic vector bundle E->X is analitically isomorphic to an algebraic one, say F->X, and by definition F is locally trivial in the Zariski topology. But since the isomorphism between E and F is analytic, I fail to see if this implies that E is Zariski locally trivial too.

I hope the answer is not "trivially yes" for some stupid reason, but I cannot guarantee that.

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You get (analytic) trivializations of E over Zariski-open sets just by composing a trivialization of E with the isomorphism between E and F. Of course, you do not get algebraic trivializations, but for this you would need an algebraic structure on E in the first place.

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It seems to work, and it seems that my question was trivial, as I suspected. Thank you anyway, for your clarification :-) –  Andrea Ferretti Nov 5 '09 at 0:02