title: Covariant (invariant theory)
text: # Covariant (invariant theory)
  
  In invariant theory, a branch of algebra, given a group G, a covariant is a G-equivariant polynomial map $V\to W$ between linear representations V, W of G. It is a generalization of a classical convariant, which is a homogeneous polynomial map from the space of binary m-forms to the space of binary p-forms (over the complex numbers) that is $SL_{2}(\mathbb {C} )$-equivariant.
  
  