Haag–Łopuszański–Sohnius theorem
= Haag–Łopuszański–Sohnius theorem
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The Haag–Łopuszański–Sohnius theorem allows a Z2-graded Lie superalgebra and shows that supersymmetry, including possible central charges and R-symmetries, is the nontrivial fermionic extension compatible with an interacting relativistic S-matrix.