Campoamor Stursberg, Otto-RudwigRausch de Traubenberg, Michel2023-06-212023-06-211742-658810.1088/1742-6596/597/1/012021https://hdl.handle.net/20.500.14352/65297The unitary representations of the three dimensional simple Lie groups are reconsidered from the perspective of harmonic functions acting on certain manifolds related to differential realisations of the groups themselves. By means of contractions of Lie groups, the procedure is also applied to the group E2 of rotations-translations in two dimensions.engAtribución 3.0 Españahttps://creativecommons.org/licenses/by/3.0/es/journal articlehttps://doi.org/10.1088/1742-6596/597/1/012021open access512Álgebra1201 Álgebra