Codimension-two transverse torsion principle

From papers

Let XX be a complex variety with a codimension-two stratum

ΣX\Sigma\subset X

whose transverse singularity is a normal surface singularity with local discriminant package (E,q)(E,q). Then the higher-dimensional carrier of this torsion is a finite local system E\mathcal E on Σ\Sigma, with fiber EE. Codimension-two transverse torsion principle. The global contribution of the transverse torsion package is governed by the cohomology groups

Hr(Σ,E),H^r(\Sigma,\mathcal E),

together with their support, Brauer, residue, and rationalization trajectories. This principle proposes the natural higher-dimensional continuation of the surface package through codimension-two strata rather than isolated higher-dimensional ordinary double points.

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Sources & referencesView supporting material

Primary source

Abdul Rahman, “Torsion Trajectories from Local Discriminants to Global Obstructions”, arXiv:2605.00355 (2026).

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