n
u
m
b
e
r
o
f
s
t
e
p
s
m
a
p
p
i
n
g
s
h
i
f
t
m
a
p
3
/
2
m
a
p
λ
=
3
.
5
q
u
a
d
r
a
t
i
c
m
a
p
λ
=
4
q
u
a
d
r
a
t
i
c
m
a
p
i
n
i
t
i
a
l
c
o
n
d
i
t
i
o
n
1
π
1
2
1
3
s
i
z
e
o
f
p
e
r
t
u
r
b
a
t
i
o
n
p
e
r
t
u
r
b
a
t
i
o
n
0
.
0
0
0
0
1