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Discriminant (Binary Quadratic Form)

The discriminant of a Binary Quadratic Form

\begin{displaymath}
au^2+buv+cv^2
\end{displaymath}

is defined by

\begin{displaymath}
d\equiv b^2-4ac.
\end{displaymath}

It is equal to four times the corresponding Determinant.

See also Class Number




© 1996-9 Eric W. Weisstein
1999-05-24