Compatibility and limiting local cohomology conjectures for arc algebras

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Let J[0N,(1)N′]J[0^N,(1)^{N'}] and A[0N,(1)N′]A[0^N,(1)^{N'}] be the finite arc algebras, let a\mathfrak{a} be the local-cohomology support ideal, and let th\mathsf{th} denote the homomorphisms induced by the conjectural constructions in the source. Semi-infinite local-cohomology conjecture. The groups Hai(J[0N,(1)N′])H_{\mathfrak{a}}^i(J[0^N,(1)^{N'}]) for different N,N′N,N' are related by homomorphisms th\mathsf{th} as specified in the source; they satisfy the corresponding compatibility relation needed to define the limiting groups Hai+∞2(Af)H_{\mathfrak{a}}^{i+\frac{\infty}{2}}(A_f); and the map

Hai+∞2(A)→Hai+∞2(Af)H_{\mathfrak{a}}^{i+\frac{\infty}{2}}(A)\to H_{\mathfrak{a}}^{i+\frac{\infty}{2}}(A_f)

extends the finite-level map. These assertions are intended to construct a well-defined semi-infinite local-cohomology theory from the finite approximations.

References

Primary source

M. V. Movshev, “Local algebra and string theory”, arXiv:1511.04743 (2016).

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