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Physical Chemistry 3: — Chemical Kinetics — - Christian-Albrechts ...

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Appendix D 274<br />

D.2 Special matrices and matrix operations<br />

I Identity matrix: I = 1<br />

I = 1 =<br />

⎛<br />

⎜<br />

⎝<br />

10 0<br />

01 0<br />

. . .<br />

00 1<br />

⎞<br />

⎟<br />

⎠<br />

(D.4)<br />

We frequently use the Kronecker :<br />

= <br />

(D.5)<br />

where<br />

½<br />

1 for = <br />

=<br />

0 for 6= <br />

(D.6)<br />

I<br />

Diagonal matrices:<br />

⎛<br />

⎜<br />

⎝<br />

⎞<br />

11 0<br />

0 22 0<br />

⎟<br />

. . . . ⎠<br />

0 0 <br />

(D.7)<br />

I<br />

Block diagonal matrices:<br />

⎛<br />

⎞<br />

11 12 0<br />

<br />

⎜ 21 22 0<br />

⎟<br />

⎝ . . . . ⎠<br />

0 0 <br />

(D.8)<br />

I Complex conjugate (c.c.) of a matrix: A ∗<br />

To obtain the complex conjugate A ∗ of the matrix A, change to −:<br />

( ∗ ) <br />

=( ) ∗ (D.9)<br />

I Transpose of a matrix: <br />

To obtain the transpose A of the matrix A, interchange rows and colums:<br />

¡<br />

<br />

¢ =( ) (D.10)

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