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submitted 5 months ago by [email protected] to c/[email protected]

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[–] [email protected] 1 points 5 months ago (1 children)

Ok, that's actually quite interesting

[–] [email protected] 2 points 5 months ago* (last edited 5 months ago)

Yup, you'll notice the only thing distinguishing C from R^(2) is that multiplication. That one definition has extremely broad implications.

For fun, another definition is in terms of 2x2 matrices with real entries. The identity matrix

1 0
0 1

is identified with the real number 1, and the matrix

0 1
-1 0

is identified with i. Given this setup, the normal definitions of matrix addition and multiplication define the complex numbers.