EntityQ12609547· pop 5· linked from 28 articlesWigner's classificationSign in to saveclassification of irreducible representations of the Poincaré groupConnectionsMinkowski spacetimeEntitygroup actionEntityeigenvectors and eigenvaluesEntityirreducible representationEntitycausal structureEntitymathematicsEntityenergyEntityInternational Standard Book NumberEntityvacuumEntityreal numberEntityphotonEntitydigital object identifierEntityspacetimeEntityEugene WignerEntitySteven WeinbergEntitygroupEntitytheoretical physicsEntityhadronEntityleptonEntityelectromagnetic fieldEntityCategoriesMathematical physicsQuantum field theoryRepresentation theory of Lie groups