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   Manić, S. B.; Notaros, B. M. (February 2019, ACES)
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   Totaro, Burt (January 2020, Forum of Mathematics, Sigma)

   null (Ed.)

   Abstract We show that if X is a smooth complex projective surface with torsion-free cohomology, then the Hilbert scheme $$X^{[n]}$$ has torsion-free cohomology for every natural number n . This extends earlier work by Markman on the case of Poisson surfaces. The proof uses Gholampour-Thomas’s reduced obstruction theory for nested Hilbert schemes of surfaces. 

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   https://doi.org/10.1109/LAWP.2024.3402749  

   Hu, Jin; Sideris, Constantine (January 2024, IEEE Antennas and Wireless Propagation Letters)

   This paper introduces an efficient approach for solving the Electric Field Integral Equation (EFIE) with highorder accuracy by explicitly enforcing the continuity of the impressed current densities across boundaries of the surface patch discretization. The integral operator involved is discretized via a Nystrom-collocation approach based on Chebyshev polynomial expansion within each patch and a closed quadrature rule is utilized such that the discretization points inside one patch coincide with those inside another patch on the shared boundary of those two patches. The continuity enforcement is achieved by constructing a mapping from those coninciding points to a vector containing unique discretization points used in the GMRES iterative solver. The proposed approach is applied to the scattering of several different geometries including a sphere, a cube, a NURBS model imported from CAD software, and a dipole structure and results are compared with the Magnetic Field Integral Equation (MFIE) and the EFIE without enforcing continuity to illustrate the effectiveness of the approach. 

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