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eigenspaces (mander.xyz)

submitted 6 months ago by [email protected] to c/[email protected]

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[–] [email protected] 12 points 6 months ago (3 children)

Wtf is an eigenspace. I just learned about eigen vectors 💀

I mean I can guess I suppose

[–] [email protected] 21 points 5 months ago (1 children)

You want an answer?

So you've probably learned that if u is an eigenvector, then multiplying u by any scalar gives you another eigenvector with the same eigenvalue. That means that the set of all a*u where a is any scalar forms a 1-dimensional space (a line if this is a real vector space). This is an eigenspace of dimension one. The full definition of an eigenspace is as the set of all eigenvectors of a given eigenvalue. Now, if an eigenvalue has multiple independent eigenvectors, then the set of all eigenvectors for that eigenvalue is is still a linear space, but of dimension more than one. So for a real vector space, if an eigenvalue has two sets of independent eigenvectors, its eigenspace will be a 2-dimensional plane.

That's pretty much it.

[–] [email protected] 5 points 5 months ago

Neat actually, and it fits into my understanding of linear algebra pretty well

[–] [email protected] 9 points 6 months ago

I, a mere mortal, have no idea what the fuck this meme is talking about and I am slightly afraid. This sounds like Deep Math™️

[–] [email protected] 1 points 5 months ago (2 children)

did you learn about eigenvectors? or did you just memorize what you needed to pass linear algebra?

[–] [email protected] 4 points 5 months ago (1 children)

I "learned" about them for quantum computing (I think that's mostly linear algebra). I was kind of disappointed they're just vectors I somehow expected them to do something weird (based off the name).

[–] [email protected] 3 points 5 months ago (1 children)

My experience with eigenstuff has been kind of a slow burn. At first it feels like "that's it?", then you do a bunch of tedious calculations that just kind of suck to do... But as you keep going they keep popping up in ways that lead to some really nice results in my opinion.

[–] [email protected] 2 points 5 months ago

I guess it's the same for me but I just kind of think of it as vector stuff not eigen* stuff.

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

I learned enough about eigenvectors to handle differential equations lmao. Never took linear algebra

I did watch the 3blue1brown series on linear algrebra tho