Basic Examples
(
2
)
Compute a Hessian determinant:
I
n
[
1
4
]
:
=
[
◼
]
H
e
s
s
i
a
n
D
e
t
e
r
m
i
n
a
n
t
[
S
i
n
[
x
]
C
o
s
[
y
]
,
{
x
,
y
}
]
O
u
t
[
1
4
]
=
1
2
(
-
C
o
s
[
2
x
]
+
C
o
s
[
2
y
]
)
—
—
—
Compute another Hessian determinant:
I
n
[
2
2
]
:
=
[
◼
]
H
e
s
s
i
a
n
D
e
t
e
r
m
i
n
a
n
t
[
x
^
3
-
2
x
y
-
y
^
6
,
{
x
,
y
}
]
O
u
t
[
2
2
]
=
-
4
(
1
+
4
5
x
4
y
)