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Abstract
We use elementary linear algebra to explicitly calculate a basis for, and the
dimension of, the space of degree-three covariants for a binary form of arbitrary
degree. We also give an explicit basis for the subspace of covariants complementary to
the space of degree-three reducible covariants.
Keywords
theory of covariants, invariant theory, symbolic method,
binary forms
Mathematical Subject Classification 2000
Primary: 13A50, 15A72, 16W22
Milestones
Received: 16 October 2008
Revised: 8 December 2009
Accepted: 21 December 2009
Published: 13 January 2010
Communicated by Scott Chapman