2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/192669We review the properties of quantum groups occurring as Kazhdan--Lusztig dual to logarithmic conformal field theory models. These quantum groups at even roots of unity are not quasitriangular but are factorizable and have a ribbon structure; the modular group representation on their center coincides with the representation on generalized characters of the chiral algebra in logarithmic conformal field models.27pp., amsart++, xy. v2: references added, some other minor additionsHigh Energy Physics - TheoryQuantum Algebratext