Conditions suffisantes d'équirépartition modulo 1 . Problème de Waring-Golbach pour f (x) == Xc , c non entier.
We establish the non-singular Hasse principle for pairs of diagonal quartic equations in 22 or more variables. Our methods involve the estimation of a certain entangled two-dimensional 21st moment of quartic smooth Weyl sums via a novel cubic moment of Fourier coefficients.