Weiss tower obstruction conjecture for embedding immersions

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Let PP and NN be manifolds of dimensions pp and nn, respectively, and let f ⁣:P→Nf\colon P\to N be an immersion equipped with a lift fj−1∈Ej−1(P,N)f_{j-1}\in E_{j-1}(P,N). For j≥2j\geq 2, let Cj−1C_{j-1} be the relevant coefficient spectrum, let Ej′(f)E'_j(f) be the complement of the fat-diagonal pullback, and let ξ=(j−1)τN−jτP\xi=(j-1)\tau_N-j\tau_P be the induced virtual bundle. Weiss tower obstruction conjecture. There is an obstruction

μ(fj−1)∈πj−1(Cj−1∧hΣjEj′(f)ξ)\mu(f_{j-1})\in\pi_{j-1}\left(C_{j-1}\wedge_{h\Sigma_j}E'_j(f)^\xi\right)

that vanishes when fj−1f_{j-1} lifts to Ej(P,N)E_j(P,N). Conversely, if

(j+1)p+2j−1≤jnandp≤n−3,(j+1)p+2j-1\leq jn\qquad\text{and}\qquad p\leq n-3,

then vanishing of μ(fj−1)\mu(f_{j-1}) implies that fj−1f_{j-1} lifts to an embedding of PP in NN. This conjecture seeks to extend the complete obstruction theory for deforming immersions to embeddings beyond the metastable range, using the Weiss embedding tower; the stated dimension inequalities are the range in which the converse is proposed.

References

Primary source

John R. Klein and Bruce Williams, “Homotopical Intersection Theory, III: multi-relative intersection problems”, arXiv:1212.4420 (2019).

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