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166
Section 12: Calculating with Matrices
Keystrokes
´ <
B
∕
´> 3
The representation of Z
Multiplying Complex Matrices
The product of two complex matrices can be calculated by using the fact
P
that (YX)
=
To calculate YX, where Y and X are complex matrices:
1. Store the elements of Y and X in memory, in the form either of
P
C
Z
or Z
.
2. Recall the descriptor of the matrix representing Y into the
display.
3. If the elements of Y were entered in the form of Y
´p to transform Y
4. Press ´> 2 to transform Y
5. Recall the descriptor of the matrix representing X into the
display.
6. If the elements of X were entered in the form X
´p to transform X
7. Designate the result matrix; it must not be the same matrix as
either of the other two.
Display
A
4
b
4
b
4
-1
in partitioned form is contained in matrix B.
. 0
0254
. 0
0122
B
. 0
2829
. 0
1691
P
.
C
into Y
C
into X
4
Designates B as the result
matrix.
4
Calculates ( )
places the result in matrix B.
2
Transforms (
-1
P
(
)
.
. 0
2420
}
Real
. 0
1017
}
. 0
0022
Imaginary
. 0
1315
P
.
P
into .
P
.
-1
-1
= (
) and
-1
) into
P art
P art
C
, press
C
, press
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