  If $\P^\infty$ is the projective ind-space, i.e. $\P^\infty$ is the inductive
limit of linear embeddings of complex projective spaces, the Barth-Van de
Ven-Tyurin (BVT) Theorem claims that every finite rank vector bundle on
$\P^\infty$ is isomorphic to a direct sum of line bundles. We extend this
theorem to general sequences of morphisms between projective spaces by proving
that, if there are infinitely many morphisms of degree higher than one, every
vector bundle of finite rank on the inductive limit is trivial. We then
establish a relative version of these results, and apply it to the study of
vector bundles on inductive limits of grassmannians. In particular we show that
the BVT Theorem extends to the ind-grassmannian of subspaces commensurable with
a fixed infinite dimensional and infinite codimensional subspace in
$\C^\infty$. We also show that for a class of twisted ind-grassmannians, every
finite rank vector bundle is trivial.
