Some of those are just definitions. Not sure what's the usefulness of det(A) = |... | Hacker News

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		sobriquet9 on July 23, 2023 \| parent \| context \| favorite \| on: Stem Formulas Some of those are just definitions. Not sure what's the usefulness of det(A) = \|A\| or c=λf, it's not like one would need to look that up.

Frummy on July 23, 2023 | [–]

Clicking on the det card shows definitions for 2x2 and 3x3 matrices, probably wouldnt fit on the card

contravariant on July 23, 2023 | [–]

The first one just looks like a tautology but the latter might be helpful, even if it is a bit trivial if you think about it.

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