[996] The extension problem for certain function spaces involving fractional orders of differentiability

[997] $K$-divisibility of the$K$-functional and Calderón couples

[998] An interpolation theorem

[999] Criteria for absolute convergence of multiple fourier series

[1000] The local$Π$_{1}of the complement of a hypersurface with normal crossings in codimension 1 is abelianof the complement of a hypersurface with normal crossings in codimension 1 is abelian