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if a pure strategy
C
has positive probability, all the pure strategies obtained from
C
by successive applications of transformation
T
,
TC
,
T
2
C
,
T
3
C
, ...,
T
m
−
1
C
,have
the same probability. A similar result is obtained in [
1
].
Fig. 3.4
Effect of transformation
T
3.4 Two Games with Invariance Properties
We solve two games satisfying (
3.4
). Some seminal results for the first of them,
the one-element intersection game, can be found in [
8
] and the weighted inspection
game, which is the second game, has been studied in [
11
].
3.4.1 One-Element Intersection Game
The one-element intersection game (OEIG), is a game
(
X
,
Y
,
M
)
on a lattice
L
satis-
fying the following conditions:
X
=
F
Y
=
{
B
:
B
⊂
L
, |
B
|
=
s
}
1
,
if
|
A
∩
B
|
=
1
M
(
A
,
B
)=
.
The intepretation of this game is that Player I wins if he finds just one point of
B. When he finds this first point, however, an alarm system is activated, so that if he
0
,
otherwise
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