Processing math: 100%
Operator notation; initial condition
[
u
=
I
]
0
,
[
D
2
t
u
=
0
]
0
where
[
D
2
t
u
]
n
is defined as
[
D
2
t
u
]
n
=
u
n
+
1
−
u
n
−
1
2
Δ
t
.
