Quadratic Invariant
Given the
Binary Quadratic Form
(1)
with
Discriminant
, let
(2)
(3)
Then
(4)
where
(5)
(6)
(7)
so
(
8
)
Surprisingly, this is the same discriminant as before, but multiplied by the factor
. The quantity
is called the
Modulus
.
See also
Algebraic Invariant
© 1996-9
Eric W. Weisstein
1999-05-25