\(\def\Real{\mathbb{R}}\)

Finishing Guler, Chapter 4 and covering Chapter 6.

Class notes (pretty incomplete, to be used just as a study guide), here and here.

**Exercises**:

- For each facet of the unit cube in \(\Real^3\) (eight vertices, twelve edges, six faces) find the set of \(x\in\Real^3\) such that closes to \(x\) point in the cube belongs to the given facet.

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