Definition

Let g\mathfrak g be a and let VV be a . A representation of g\mathfrak g on VV is an even Lie-superalgebra morphism

ρ:ggl(V),\rho:\mathfrak g\longrightarrow\mathfrak{gl}(V),

where gl(V)=End(V)\mathfrak{gl}(V)=\underline{\operatorname{End}}(V) is the with its bracket.

Equivalently, homogeneous xgx\in\mathfrak g acts by an endomorphism of parity x|x|, and

ρ([x,y])=ρ(x)ρ(y)(1)xyρ(y)ρ(x).\rho([x,y]) =\rho(x)\rho(y)-(-1)^{|x||y|}\rho(y)\rho(x).

The adjoint representation is the action on g\mathfrak g given by adx(y)=[x,y]\operatorname{ad}_x(y)=[x,y]. The super Jacobi identity is exactly the identity that makes this a representation.

References
  1. M. Scheunert, The Theory of Lie Superalgebras, Lecture Notes in Mathematics 716, Springer, 1979. Publisher record. Relevant: Chapter 1.
  2. I. M. Musson, Lie Superalgebras and Enveloping Algebras, American Mathematical Society, 2012. Publisher record. Relevant: Chapters 1–2.