Integral Convergence
Let such that
f
n
→
u
n
i
f
f
and fix
c
∈
[
a
,
b
]
then the new sequence of functions
F
n
:
[
a
,
b
]
→
R
F
n
(
x
)
:=
∫
c
x
f
n
(
t
)
d
t
converges uniformly on
[
a
,
b
]
to the function
F
(
x
)
:=
∫
c
x
f
(
t
)
d
t
Derivative Convergence
Suppose that
f
n
is a sequence of continuously differentiable functions on
[
a
,
b
]
such that
f
n
′
converges uniformly to a function
g
and there is a point
c
∈
[
a
,
b
]
such that
lim
n
→
∞
f
n
(
c
)
=
γ
exists. Then
f
n
converges uniformly to a differentiable function
f
with
f
(
c
)
=
γ
and
f
′
=
g