PPT Slide
A B =
a a b b
a a b b
(
)
(
)
11
12
21
22
11
11
12
21
22
11
A B =
a a b b
a a b b
(
)
(
)
12
14
23
24
21
13
32
41
42
31
a a b b
a a b b
(
)
(
)
12
21
22
11
12
21
22
11
a b + a b
a b + a b
(
)
11
21
11
11
21
22
21
12
a b + a b
a b + a b
12
21
12
11
22
22
22
12
=
a a b b
a a b b
(
)
(
)
14
23
24
13
32
41
42
31
a b + a b
a b + a b
(
)
31
23
31
13
41
24
41
14
a b + a b
a b + a b
32
23
32
13
42
24
42
14
=
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