... so
.
cˆa
´
p:
F = 2 ◦ P
1
+ 1 ◦ P
2
+ 1 ◦ Φ
1
+ 1 ◦ Φ
2
+ 1 ◦ Φ
3
,
trong d¯´o
P
1
= {s, v
2
, v
4
, t},
P
2
= {s, v
1
, v
3
, v
2
, v
4
, t},
Φ
1
= {v
1
, v
3
, v
2
, v
1
},
Φ
2
= {v
2
, v
4
, ... kh´ac
c[Φ
l
|G
µ
(F + 1 ◦ (Φ
1
))] ≥ c[Φ
l
|G
µ
(F )]
v´o
.
i mo
.
i l = 1, 2, . . . , k.
Vˆa
.
y chi ph´ı cu
˙’
a luˆo
`
ng F + 1 ◦ (Φ
1
) + 1 ◦ (Φ
2
) l`a
c[F +...
... •
•
e
∗
1
e
∗
2
e
∗
3
e
∗
4
e
∗
5
e
∗
7
e
∗
6
(b)
H`ınh 6 .12 : (a) D
-
ˆo
´
i ngˆa
˜
u cu
˙’
a d¯ˆo
`
thi
.
trong H`ınh 6 .11 (a). (b) D
-
ˆo
´
i ngˆa
˜
u cu
˙’
a d¯ˆo
`
thi
.
trong H`ınh
6 .11 (b).
6.6 ... bˆo
´
n
(10 − 6 = 4) dˆay chuyˆe
`
n:
{v
1
, v
2
, v
3
, v
4
, v
5
, v
1
}, {(v
1
, v
4
)}, {(v
2
, v
5
)}, {(v
4
, v
6
), (v
1
, v
6
)}, {(v
3
, v
6
)},
v`a
{v
1
, v...
... Standard
Code for Information Interchange cu
˙’
a k´y tu
.
.
A l`a 010 000 01, cu
˙’
a k´y tu
.
.
a l`a 011 000 01 v`a k´y
tu
.
.
, l`a 0 011 010 . Ch´u ´y rˇa
`
ng trong m˜a ASCII sˆo
´
c´ac bit su
.
˙’
du
.
ng ...
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
s
1
s
2
C´ac d¯iˆe
˙’
m
Steiner
P
1
P
2
P
3
P
4
•
•
•
•
•
•
•
•
• •
12 0
0
12 0
0
H`ınh 4 .14 : (a) Cˆay bao tr`um nh...
... Tarjan.
31
http://www.ebook.edu.vn
Do d¯´o ma trˆa
.
n pha
.
m vi c´o da
.
ng
R =
v
1
v
2
v
3
v
4
v
5
v
6
v
7
v
1
1 1 0 1 1 0 0
v
2
0 1 0 1 1 0 0
v
3
0 0 1 1 1 0 0
v
4
0 ... =
v
1
v
2
v
3
v
4
v
5
v
6
v
7
v
1
1 1 0 1 1 0 0
v
2
0 1 0 1 1 0 0
v
3
0 0 1 1 1 0 0
v
4
0 0 0 1 1 0 0
v
5
0 0 0 0 1 0 0
v
6
0 0 1...
... d¯ˇa
.
c biˆe
.
t l`a c´ac ba
.
n sinh viˆen, trong qu´a tr`ınh biˆen soa
.
n gi´ao tr`ınh n`ay.
D
-
`a La
.
t, ng`ay 5 th´ang 3 nˇam 2002
PHA
.
M Tiˆe
´
n So
.
n
8