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STRIPS
-
Definition – Result
-
Let
P
be a set of facts,
s
⊆
P
a state, and
a
an action. The
result
result(s
,
‹a›
)
of applying
a
to
s
is:
-
result(s
,
‹a›
) = (
s
∪
add(a)) \ del(a)
iff
pre(a)
⊆
s
; undefined otherwise
-
In the first case, the action
a
is said to be applicable in
s
. The result of applying an action sequence
‹
a
1
, ... ,
a
n
›
of arbitrary length to
s
is defined by
result(s
,
‹
a
1
, . . . ,
a
n
›
) =
result(result(s
,
‹
a
1
, . . . , a
n-1
›
),
‹
a
n
›
)
and
result(s
,
‹›
) =
s
.
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