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Topology and its Applications
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Topology and its Applications
Article . 1995
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Topology and its Applications
Article . 1995 . Peer-reviewed
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Complex projective spaces as PL fibrators

Authors: Robert J. Daverman;

Complex projective spaces as PL fibrators

Abstract

This eloquently written paper presents further investigation of the problem when a given PL map is an approximate fibration. Let \(M\) be a connected, orientable, PL \((n + k)\)-manifold, \(B\) a polyhedron. A PL map \(p : M \to B\) is said to be \(N\)-like, where \(N\) is a fixed orientable \(n\)-manifold, if each \(p^{-1} b\) collapses to an \(n\)-complex homotopy equivalent to \(N\). \(N\) is called a codimension \(k\) PL fibrator, if for every orientable \((n + k)\)-manifold \(M\) and \(N\)-like \(p : M \to B\), \(p\) is an approximate fibration. \(N\) is a PL fibrator if it has this property for all \(k > 0\). E.g. previous results say that 2-manifolds, all but the 2-sphere and the torus are PL fibrators, and that also \((k - 1)\)-connected manifolds \((k > 1)\) are codimension \(k\) fibrators. The main result is that the complex projective \(n\)-space \(\mathbb{C} P^n\) is a codimension \(2n + 2\) PL fibrator. Concerning the proof one should point out that it employs quite a lot of algebraically topological arguments and in part depends on some previous results of the same author.

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Keywords

Approximations in PL-topology, Complex projective space, hopfian manifold, Hopfian manifold, Approximate fibration, Cohomology ring, Algebraic topology of manifolds, approximate fibration, complex projective space, hopfian group, Fibrator, Hopfian group, fibrator, cohomology cup product, Geometry and Topology, Cohomology cup product

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
3
Average
Average
Average
hybrid