- #1

Char. Limit

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1. All of the matrices I've worked with so far dealt with real numbers or real functions of real numbers. Can you work instead in complex numbers, and do you have to add or remove any rules because of this?

2. All of the matrices I've worked with so far have been in 2d, that is, they've all been m-by-n matrices. However, I was wondering if mathematicians explored the idea of m-by-n-by-o matrices, or three-dimensional matrices.