Canonizant

In mathematical invariant theory, the canonizant or canonisant is a covariant of forms related to a canonical form for them.

Canonizants of a binary form

The canonizant of a binary form of degree 2n&nbsp;–&nbsp;1 is a covariant of degree n and order n, given by the catalecticant of the penultimate emanant, which is the determinant of the n by n Hankel matrix with entries a_i+jx&nbsp;+&nbsp;a_i+j+1y for 0&nbsp;≤&nbsp;i,j&nbsp;<&nbsp;n.

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