2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/52415We study deformations of four-dimensional N=(1,1)Euclidean superspace induced by non-anticommuting fermionic coordinates. We essentially use the harmonic superspace approach and consider nilpotent bi-differential Poisson operators only, which generalizes the recently studied chiral deformation of N=(1/2,1/2) superspace. We present non-anticommutative Euclidean analogs of N=2 Maxwell and hypermultiplet off-shell actions. The talk is based on the paper hep-th/0308012.LATEX file, 10 pages, Contribution to Proceedings of the International workshop "Supersymmetries and quantum symmetries", 24-29 July, Dubna, 2003High Energy Physics - Theorytext