! " !#$%" #$" #$%&'(&)" * #+ (&$,
!"# $ $
% "
& ' ( ) * !"# +,
- $ . ' % $
/ . %
!"# $
0 1 . #
2 / !"#
*3456+,
*3457+, #
1 - . ((1 89 # *344:+
1 % !"#
*;636+$
% "
& ' ( ) * !"# +
! " # $
% "
# &
& ' ( % )
*
+ +
& " $#
) ,
% $#
# (
" " &
*
* # &
% # "
! " !#$%" #$" #$%&'(&)" * #+ (&$,
% ) % < - . #
-. #
-&
/
& / &
0 0 .&
& " &
" 1 & # & / #
/ & 1 2 #
& & )
& "
1 2 # # /
( & /
& / /
0 0 #
& # & "
2 1 2 # & /
& #
& # 1 2 # 2& & "
0 & & )
= >? < @ . &
#/-. & # - 0& #
- . &/#&0#(&$( (,#&%#(&$1
" 2
3 " .* 4
5 5 ! 6 7" 8
8 5 ! "
! 5 ! 9 #
9 6(&&)7" 3
) " ! : 9 ;"
: ; : ;" 4 4 " !
3
! " !#$%" #$" #$%&'(&)" * #+ (&$,
8 .< " "
5 5 " " #" 4
! # 9 =###>
8 9 ?
" " 4 @
8 ? 9 <
<5 <5 ! "
$ # A ' !
@ 5 4
5
" " !
! " . @ 6 BC-D" (&&)" # (&7#
8 " ' 3 4 .
8 9 4 "
E # 5 9 E ' #
' 4 5
E " . !
" ! 3 . #
F
4 G H
I E 5 6HI 7" 4 ! " (&&J" E $"$% . @
6 " 1 1 7 "
@ /0 # K " E
$"(1 . @ " L "
11"1 @8 4 " 9 ("JM #
5 " !
1 # 4 ! N OG " (),"$ @8 " 5 @
%J")0 @8 " J)"(( @8 #
O (&&%" ! 5 * "
L @ ,("% @8 4 .
! " 1"/M 5 . ,/M
" 5 * B O "
4 9 3" # . 4 #
5 0 " 1# P ! /&,", @8 6,$M7"
. # " 1 # !
" (/") @8 " ("$M
# " (&&J" O G E
4 " E "
(&$&" " L ! O G " 0Q
61 1 # 7
@ " " @ R 4 " * "
(J1"/ @8 #
1
C ! N S@ N++TTT# ! # +. 9 + 'L-+ . ' ' ! + + 5 + # FU#
! " !#$%" #$" #$%&'(&)" * #+ (&$,
O (&$&" 5 O ! 5 4
G HI " 4 ! !
" E F N $,&
@8 (&$," 4 9
@ . # V * " ! (&& @8
(&$)" * " #
5 4 HI " !
4 5 ! E 1&
# @ 4 " 5 4 "
4 8 4 "
! 4 .
" $&& @8 4 (&$(#
W F " " @ ! !
)",M" (&&%" 5 !
5 !
4 6 (&&J )M7" F !
0M <F 6 IXW O A CB"
(&$&7#
C . (&$1 # &
0 / . 6 6 AG27" L "
(&$(" ! $ @ F " .
E <! '
! . 4 F #
< " L
3 R C ! ! A 5
AG" C (&$( &#,$
5 . &#(&" ! )(
5 Y 5 ! ! A #
A ! Z 4 5
" 4 " " "
9 @
F ! F #
K ! " " @ . 5
! 6 F " 5 " 7 5
4 F . "
! " "
5 " @
@ #
- F8 Z ! . Z !
" 4 ! .
! 5 " ! F <
" 6 7" * 4
2
3 #
2
A G 6 AG7 5 W 8 G 9 A 5
' A # C ! N S@ N++TTT# # + + . + 5 + # FU#
! " !#$%" #$" #$%&'(&)" * #+ (&$,
" " @
! @ ! "
4 " . . "
' 9 8
' .* ! @
# F8
5 " "
" !
. " . F 9
@ . @ ! "
" 6$%J/ (&&17" L Y 6$%%$7" L 6$%%0 $%%J7" ! - . 6(&&(7" V*[ 6(&&17 \ 6(&&) (&&0 7#
!
"
" ! "
" 4 Z 3
F 9 8
" ! 5 3
! # W 5 " ! 5 4 "
F " #
W F 9 8 " F
9 ! ! "
5 . " *
" 5 # @ ! H - .
6(&&(7" 4 ! G !
4 N
* F
.* ! .* ! 4
+ 4 " 4
< @ 6 ! 7"
" . "
6 " - LO -B" (&&(" # (%7#
B " " * !
5 ! " ! " 4
. 8 @ N ]=###>
" ! " ! 5 " "
N ! # =###>
! 5 ^ 6 " - LO -B" (&&(" # (%7#
8
E ! 9 ! 8
! 4
! " !#$%" #$" #$%&'(&)" * #+ (&$, # ! - . 6(&&(" # $&)7 5 4
9 *
F 9 8 " ] @ ! .
' F ^#
4 " ! !
" ! "
. 3 N
=###> ' * 5 4
< 6
7 5 " 6
! . . 4 !
Z - ! H 7"
" 5 =###># 6 " - LO -B" (&&(" # J/7#
B 8 " . " 4
" " ]
<5 4 5 5
^ 6(&&(" # ),7" 4 "
@ " @ ' ! !
5 #
. ! ! "
! 4 .* ! "
. "
@ #
__" " *
" . 5
. ! 9
#
5 " V*[
6(&&17" 4 ! - . " 4
" 8 F 9 5
4 " "
@ # B 4 !
<5 " "
! ! <
5 " "
5 N
F
" @ # G "
"
! @ # B ! 4
!
! " !#$%" #$" #$%&'(&)" * #+ (&$, $
@ L Y " ] ^ 6$%%$7"
@ " @ 5 " " 8 @ N
! " ' "
@ # W "
4 !
! " ! # W 4 9
@ " .* "
9 #
W 3 . " ! ' " " 5 .
" @ ! " ! "
.* ! # 9 "
@ ! 4 " L Y 6$%%$7
* 5 ! ' ' #
W " " . " .* " 4
! " 6
7 9 ! " *
" F # L Y 6$%%$7 . 8
5 . 5 . @ 4
] F 5 a @
b a @ b
. 8 @ ^
6LG c WC" $%%$" # 17#
8 " <
@ . ! 9 #
O " L Y 6$%%$7" ! 5 !
! ! ! ! # O!
" ' 5 '
.* " . E * #
L Y 6$%%$7 ! 4
2 " 4
6$%J/7 " . " ! ! - . 6(&&(7
V*[ 6(&&17# C 4 " * " 8
* Z E
N
5 .* ! "
@ < " "
9 " #
# - .*
5 " " a
! b# . 5 8 8
N " 5 " 5 " "
# B 4 8
8 " " .* #
! " !#$%" #$" #$%&'(&)" * #+ (&$, %
B 6 7 " " " *
5 " !
__" ] 5 "
5 ' .* ' F "
" 5 @ " ^ 6LG c WC" $%%$" # )7#
B " L Y " 9
' ! F '
" 4 4 .* ! N
B 3 6$%1," # ($07" "
! a b
a b 6 " 9 !
! 7 .* " " .* 4
! @ " .*
. @ "
4 F # B a b 6 a
b7 9
4 5 ! #
=###> W F " .*
" "
# 6LG c WC" $%%$" # 0" 7#
W " ' " . " 4 L Y
5 5 " " 4
5 9 5 " ] "
F " F ^ 6LG c WC" $%%$" # 07# B
! ' " " ! ! " 4
4 . " " .* !
! # C " ' " . "
F " 4 3 N
4
! " 4 5 .* ! 8 !
6 7 ! "
* 5 N ! !
" 4 "
F " 8 .* " . " 4 ! . . #
4 " ! F 4 ! 5 "
@ " " 9 F #
" 4 4 "
' . 4 5
" 5 5 < "
" 4 F N
3
. B A C < " . $%1,
! " !#$%" #$" #$%&'(&)" * #+ (&$, &
=###> B 5 5
9 ' ' #
8 "
" " " " #
6LG c WC" $%%$" # $(7#
O " " 4 4
@ " .* "
! " # 8 5 5 "
4 8 ! !
5 9 ' ' N 9
! F
! ! # ! 9 . "
8 8 . 8 4
9 ' 8 #
L Y 6$%%$7 ! ! 5 ! 5 '
8 " 4 5 < "
! E 4 5 5 "
. " 8 5 " * #
" "
5 . <5 9 <
5 @ .
! 9 N
! 8 ! 4 ! ! #
5 9
! ! " 4
8 ! #
3 8 "
8 3
. 9 5 "
8 "
@ " ' 8 . !
5 8 #
! 5
. 9 "
E ! F ! !
" " ! 6$%J/7N
5 4
5 ! . <5 " ! 4
" " 5 9 " " 9 "
" "
@ ! . 5
# <
@ !
! " !#$%" #$" #$%&'(&)" * #+ (&$,
4 !
! 5 ! # 6 G--B"
$%J/" # %7#
W "
5 __ #
. @
.
9 " ' N
3 ! 5
! " 4 ! 6
" 7 7# A " " ! 5
4 @
9 F
#
@ < 4 !
@ . . 4 7 "
7 8 9 7 ' .
! 5 ' 8 ! 5 8 Z
5 @ . ! N
9 ! *
4 ! ! 3 8
! 5 8 # W !
5 ! !
" . ! @ .
@ #
4 5 *
" 5 4 7 *
@ 5 2 "
5 . 9 # 5 "
5 . "
" 8 " .
Z # @ 5
! O @ 5 " " "
7 5 . !
3 # W @ ! ! #
" " @ 5 " 4
8 . +7 ! !
5 9 E #
" Z
" A 5 @ !
< @ < @ # B
" " " " "
* " 4 ! 5 8 5 .
! " !#$%" #$" #$%&'(&)" * #+ (&$,
'
"
(
)
.* "
8 @ ? 4
! " 5 L 6$%%J7" N
5 F 6
$%,/ $%J&7# B 5 " 9 8
5 ! @ " $%J& $%%/#
B " $%%/ " 4
@ ! #
- 6(&&17 ! 9" ! 8
@ 5 <5 N
5 " * .* 4
# B 5 5 " 5 ! "
" ! ' * 5 # B
" 5 4 !
F @ " F " 8 #
W " 5
4 " L 6$%%J7 9 4 . 9 8
5 . " .
* * N
=###> B ! ! "
5 " 4 @ /&
5
9 " " @ * "
' !3
4d " . 4 . "
" 5 5 #
A ! " . @
! # . F 9 5 "
. .
" . " " 4
! # O . F
" . 4 8 5 4
* 4 # 6L --OAB"
$%%J" # )7#
W 5 ! " L
6$%%J7" ' 5 5 ! 6(&&17
8 . 9
L Y - . 6$%0)7" e 5 W ! 5 6$%0/7"
$%0& 5 < '
W @ Yf 6(&&$7 A
! " !#$%" #$" #$%&'(&)" * #+ (&$,
$%)J" . .
@ e e ! " $%,%#
B 5 5 " " ! 5
! * ! 5 "
" @ ! # W
5 " $%%&" @
! < ' 5 " 7 8 9 7
" 5 # 5
4 . !
! N ! " 8
5 * 4
5 " . ' "
5 ! #
5 " A " 4 L 6$%%J7
"
" 4 4
4 "
@
# " ! N
K ! 5 '
"
! 5 . <5 " 4 4
! .
5 " . " " 5
# " . 4
@ < N * 5<
" . " . #
8 ! 5
F . ! . @
8
5 # 6L --OAB" $%%J" # J7#
C ' 4 . 9
9 ? ' ! Z !
# B
" ! Z ] 5d ! N ' =###> B ! 9 @ 4
! 4
H 3 # ! 4 "
8 " . #^ 6L --OAB" $%%J" # %7#
L @
<5 " 4 ]=###> 5
! ! 9 " @ !
@ ! ^ 6L --OAB" $%%0" # /7# "
' 5 "
! " !#$%" #$" #$%&'(&)" * #+ (&$,
* !
. 4 . #
4 !
@ \ 6(&&) (&&0.7"
" @ "
4 ! ! < # A ! !
@ " "
@ #
" . @ \ "
(&&)" " !
<5
Z E # O : #
, ; ; ;1 2 # ;
. O C 6\ W " (&&)" # ,,07"
\ 4 5
8 . 5 " 5 . 5 .* !
5 ! " ! . . "
"
C 5
@ # C @
# O "
N #
6\ W " (&&)" # ,,07#
B . " " F
@ #
5 . 5
. ] ^" ] ^ ] @ ^# \ 6(&&)7
4 " @ "
! " . !
5 ! " " ! "
5 " F # " " 4
4 5 !
' 4 " ! 9"
' @ " # @
' " " 6\ W " (&&)7
C " "
3 . .* ! " 4 @
"
" 9 " @ #
\ 6(&&)7" " . 5
@ N @
! 6 * 7 @ .*
# W ! " @ Z
! " " !
! " !#$%" #$" #$%&'(&)" * #+ (&$,
@ N @ 5 4
8 F " ! F "
@ .* ! ! @ #
\ 8 " " 4 F @ .* ! "
@ " @ ! " F 9
@ .* ! N ]=###> 4d " .* ! "
.* ! " @ .* ! @
5 ! ^ 6\ W " (&&)" # ,/,7# @ "
F " * . 4
5 6 E 7 4 !
* ! N F .* ! "
8 .< #
" \ 6(&&)7"
9 @
4 " ! "
" .* ! " . ' . 8
5 " 5 <
5 5 F 9 " !
@ #
W F . 2 3
" ! "
. " F
F 9 8 * @
@ ! * .
" " @ " "
5 #
L Y 6$%%$7" " .
8 5 . 5 . @ " \
6(&&)7" ! 9" L Y 6$%%$7 8
.* ! @ 4 @
F .* ! N ]=###> @ 5
4 8 F # D ! F "
" @ .* !
! @ ^ 6\ W " (&&)" # ,/&" 7# 9 8
. . ! 5
4 F @
.* ! " 9
9 " 9 "
9 8
F 9 #
"
! "
. 5 " '
! " !#$%" #$" #$%&'(&)" * #+ (&$,
5 * .
! 5 #
W . " "
F 5 * @ "
! ! ! 5
@ # F " Z Z
@ @
! "
. 9 " F 5 N
" 4 5 5
' ! ! @ #
- ' ! " "
! ! ! 5
8 # 4 " "
5 5 ! 5 9
@ " F 9
.* ! ! #
W " " 5 !
' .
8 8 " 5
@ ' ! . 9
9 !
5 # A F <
<5 " '
! " 4 9 " !
5 4 <
# B
5 5 ! " 5 5 # 8 ' " " !
5 <5 " " *
9 " 4 ] @
5 ^ 6 B-OWAO " (&&%" #
$7# O 5 @ ! * 5
8 ' " .* ! 5
. ! .
5 @ ! !
! ! #
*
IOW O A CB# <= > " $
89?@N 4 9 4 ! ! @ 5 $,& @8
4 # $/ . # (&$&# C ! N
S@ N++ # 0# + 5 ' ' + + ' '
! " !#$%" #$" #$%&'(&)" * #+ (&$, #
IOW O A CB# > $ AB N ,("%
@8 # $$ # (&&%# C ! N
S@ N++TTT# # #. + +5 ". ' ' '0' ' ' '
',(%' @ ",11,$J"&#@ U# N ()+$(+(&$&
L --OAB" # 5 !
# , WHB $%%0# ' . "
$%%0# C ! N
S@ N++ . #. 5@ # #. + %0 . # U# N $) !#
(&$$#
L --OAB" # F @ N
2 # " !# (0" # (" # $(('$(0" $%%J# C !
N S
@ N++ ! # . #. + + F# @ + + +! T +1,&U#
N % ! (&$$
LO c W" W# # -BLO-A BW" # O# @
@
# C & ' 0 / 0 " !#
(0" # ," # $%0'(&," $%0)#
LG c WC" # c# @ 5# C & ' 0 /
0 " !# ,/" # /" # 1/$'1)&" $%%$#
G--B" -# 3 # (&&1# C !
N
S@ N++TTT# # + .g #@ U# N $) !# (&$$#
V `- WC" L# H Y T 5 5 9 # D 2 #
# ) !# 1&" # (" # J0'$$$" (&&1#
B-OWAO" # # Quando as Webs se encontram. Inf.Inf., v. 14, n. esp, p. 1-24, 2009#
VB ch W# B W 5 5 # L- CION . 5 #
(&&$#
V WWBW" # @ @ f # .& >
0/ . & C !# (0" # 10%',(1 )(1')/)" f+B . "
$%,J#
SHANNON C.; WEAVER, W. The mathematical theory of communication:
Urbana, Illinois: The University of Illinois Press,1949.
" # # - LO -B" H# E F G +
N <5 ! # N
" (&&(#
BC-D" # O " 9 # , B- O "
! " !#$%" #$" #$%&'(&)" * #+ (&$, $ eO O-" e# V WWBW" # O# .& & & /
# N G ! f " $%,%#
eO- I" I# WO O WI" G# A@ @
# .& 0 ! !# %" # ," #$(0'$,&" C . $%0/#
\ W " # - 5 N H
Y T 5 # C E " !# )(" # ," # ,,0',)$" (&&)#
\ W " # # C & '
0 / 0 . & #/" !# /J" # 1" # 11/'1/&" (&&0 #
\ W " # @ N AT f' 5@
@ @ # C & ' 0 /
0 . & #/" !# /J" # /" # ),/')0(" (&&0.#
O G- WI @ f# C ! N
S@ N++TTT# # + + AG'
C+ +C + . + (&$1+ (&$1gT @ g Fg,