Counterexamples to disk embedding and Wall’s manifold conjecture
The catalogue treats two four-dimensional disk obstructions: one fixing only the boundary circles, and another also retaining induced normal framings. The latter paper's marked geometry, algebraic potentials, and finite tensor theorem feed directly into the realization problem for finitely presented integral PD4 groups as groups of closed aspherical topological four-manifolds. This guide follows the manuscripts' claims and the connections between their proofs.
All 3 overviews availableThe catalogue synthesis connects the results, proof strategies, and theorems used across these manuscripts.
Explore the synthesis and connections