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math.AP2026
Harmonic, radial, and shell stability of the weighted Einstein constraints on the sphere at infinity
Bruno Le Floch, Philippe G. LeFloch
We consider fourth-order and second-order partial differential operators localized on domains of the sphere in arbitrary dimension. These operators arise as weighted compositions o…
hep-th2026
Convergence of Nekrasov instanton sum for unitary quivers
Bruno Le Floch
The convergence radius of Nekrasov partition functions (as a function of instanton counting parameters) is shown to be positive for 4d quiver gauge theories with un…