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Inequalities related to liftings and applications
2008
Comptes rendus. Mathematique
We present two inequalities for liftings of smooth maps from the torus T d into the unit circle S 1 . Using these inequalities, we answer a question of J. Bourgain, H. Brezis, and P. Mironescu in [J. Bourgain, H. Brezis, P. Mironescu, Lifting, degree, and distributional Jacobian revisited, Comm. Pure Appl. Math. 58 (2005) 529-551] and establish an estimate of liftings in the spirit of R.R. Coifman and Y. Meyer [R.R. Coifman, Y. Meyer, Une généralisation du théorème de Calderon sur l'intégrale
doi:10.1016/j.crma.2008.07.026
fatcat:vdbinxb4urczrdlczioirvvs4e