Invariant of a binary form: Difference between revisions

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Examples: correction
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==Examples==
 
A degree form ''nf'' formis itself is a covariant of degree ''n''1 and order 1''n''.
 
The [[discriminant]] of a form is an invariant.
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\frac{\partial^2 f}{\partial y\,\partial x} & \frac{\partial^2 f}{\partial y^2} \\
\end{bmatrix}.</math>
It is a covariant of degreeorder 2''n''&minus; 4 and orderdegree 2.
 
The [[catalecticant]] is an invariant of a form of even degree.