A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 4 years ago
In this page:
http://en.wikipedia.org/wiki/Projection_(linear_algebra)#cite_note0
(and in my book)
In linear algebra and functional analysis, a projection is a linear transformation P from a vector space to itself such that P^2 = P
What is the meaning of P^2 here?
anonymous
 4 years ago
In this page: http://en.wikipedia.org/wiki/Projection_(linear_algebra)#cite_note0 (and in my book) In linear algebra and functional analysis, a projection is a linear transformation P from a vector space to itself such that P^2 = P What is the meaning of P^2 here?

This Question is Closed

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0No sure what u mean, isn't it just as it says at the top of http://en.wikipedia.org/wiki/Projection_(linear_algebra) ie P^2 = P(P(v))

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0I don't mean anything, I'm asking what is meant by it. It might be what you claim, but how is this operation called (at first I thought it was cartesian product or something), and where do you see it at the top?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Here http://en.wikipedia.org/wiki/Projection_(linear_algebra)#Simple_example

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0I found what is meant by it: http://en.wikipedia.org/wiki/Function_composition

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0P(P(v)) IS function composition....:)

phi
 4 years ago
Best ResponseYou've already chosen the best response.0P is a projection matrix. if you have a vector x Px will give you a vector in some subspace. if x is already in that subspace then you would get x= Px if we sub n Px for x in the equation x=Px we get x= PPx from which we see Px= PPx or P= P^2

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0@ estudier yeah it's a function composition but you didn't tell me what it was called at first :)

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0True, you didn't ask for that, though, u asked for the meaning...

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0I did ask for it, but it's no problem really :D
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.