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Unholy Physics (mander.xyz)

submitted 1 month ago by [email protected] to c/[email protected]

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[–] [email protected] 22 points 1 month ago (1 children)

Sometimes, you can reorient your problem such that a matrix or tensor has only diagonal entries, making it easier to handle.

For example by choosing new unit vectors or by changing the set of functions describing the problem (whatever is the thing that the matrix or tensor is tied to).

[–] [email protected] 4 points 1 month ago (1 children)

Only diagonal entries in a matrix is basically just n simple functions with no crossover, right?

[–] [email protected] 5 points 1 month ago

Key advantage of a diagonal matrix is that all off-diagonal entries are zero, so yes, no crossover of functions (or basis elements).

But the functions may be as ugly as they please and there may be an infinite number of them.