Information Technology Reference
In-Depth Information
( , ) ∈{ ( + , × ), (
,
), (
,
), . . . }
where
.
Here we give an example. Let us have the IMs X and Y
max
min
min
max
cr
cd e
a
g 1
g 2
X
=
a
f 1 f 2 f 3
f 4 f 5 f 6 ,
Y
=
,
p
g 3
g 4
b
q
g 5
g 6
with elements
1
x i
f i (
x
) =
, g i (
x
) =
i
.
x
1
for i
=
1
,
2
,...,
6. Therefore, the elements of both IMFE are elements of set
F
x .
Hence,
cder
c
de
r
1
x
x 2
x 3 2 x
a
f 1 + g 1 f 2 f 3 g 2
a x
+
x 4
x 5
x 6
X
( + )
Y
=
b
f 4
f 5 f 6
=
b
1
3 x
1
4 x
p
g 3
⊥⊥ g 4
p
⊥⊥
q
g 5
⊥⊥ g 6
1
5 x
1
6 x
q
⊥⊥
1
is an IMFE with elements of set
F
x .
1
1
On the other hand, if for i
=
1
,
2
,...,
6: g i (
y
) =
y , then g i
F
y and for the
i
.
above IMFE X and for the new IMFE Y we obtain:
cder
c
de
r
1
y
x 3 2 y
x 2
a x
+
a
f 1 + g 1 f 2 f 3 g 2
x 4
x 5
x 6
b
X
( + ) Y
=
b
f 4
f 5 f 6
=
,
1
3 y
1
4 y
⊥⊥
p
g 3
⊥⊥ g 4
p
q
g 5
⊥⊥ g 6
1
5 y
1
6 y
q
⊥⊥
2 . Obviously, if g i
y
i.e., the IMFE X
( + )
Y
F
F
z , i.e., if it has two arguments
,
x
( y and z , different from x ), then X
( + )
Y
F
z . It is suitable to define for each
,
y
,
function f with n arguments:
ν(
f
) =
n .
5.3 Relations Over IMFEs
Let everywhere, variable x obtain values in set
X
(e.g.,
X
being a set of real numbers)
and let a
be an arbitrary value of x .
Let the two IMFEs A
X
=[
K
,
L
, {
f k , l }]
and B
=[
P
,
Q
, { g p , q }]
be given. We intro-
duce the following definitions where
and
denote the relations “ strong inclusion
and “ weak inclusion ”.
 
 
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