The following books contain basic information about complex numbers, what they are good for, and how to manipulate them. This material is taught in the undergraduate engineering curriculum, but not in the typical CS curriculum.

- Louis Lyons (1995) All you wanted to know about mathematics but were afraid to ask: mathematics for science students, Volume 1, Cambridge U. Press, Cambridge UK.
- Hahn, Liang-shin (1994) Complex Numbers and Geometry, Mathematical Association of America, Washington DC.

The book by Hahn also contains substantial material, potentially very useful in computer vision, on how to use complex numbers to solve problems in geometry.

For more depth, in preparation for reading books on complex analysis:

- Fisher, Stephen D. (1990) Complex Variables (second edition), Wadsworth and Brooks/Cole, Pacific Grove CA.

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