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math.AT2009★ 8 cited
Quaternionic structures
Martin Cadek, Michael Crabb, Jiri Vanzura
Any oriented 4-dimensional real vector bundle is naturally a line bundle over a bundle of quaternion algebras. In this paper we give an account of modules over bundles of quaternio…
math.AT2007★ 17 cited
Obstruction theory on 8-manifolds
Martin Cadek, Michael Crabb, Jiri Vanzura
This note gives a uniform, self-contained, and fairly direct approach to a variety of obstruction-theoretic problems on 8-manifolds. We give necessary and sufficient cohomological…