Recent content by bigli

Please! think about and answer to main problem in my first post and attend to my notes in my second post.

http://trainbit.com/files/0810149884/Emb_Submanifold.jpg

How can I show that the set {(x,|x|) , x in real numbers} is not the image of any immersion of R into R^2 ? problem 25 chapter 2 differential geometry M. Spivak

This is not a homework but it is a question in my mind.please guide me. Let X and Y be topological spaces,let f : X -----> Y is a function. when the following statements are equivalent?: 1) f is continuous 2) f(A') is subset of f(A)' ,for every A subset of X. Symbols: A' i.e...

If x,y of R^n (as a normed vector space) are non-zero, the angle between x and y, denoted <(x,y), is defined as arccos x.y/(|x||y|). The linear transformation T :R^n----->R^n is angle preserving if T is 1-1, and for x,y of R^n (x,y are non zero) we have <(Tx,Ty) = <(x,y). what are...

If x,y of R^n (as a normed vector space) are non-zero, the angle between x and y, denoted <(x,y), is defined as arccos x.y/(|x||y|). The linear transformation T :R^n----->R^n is angle preserving if T is 1-1, and for x,y of R^n (x,y are non...

test this is a test,example:[PLAIN]www.//physicsforums.com/[/URL]

the book name what is your book name that introduce to me ??

how do stick I a link to my posts?

I need to following subjects about GRASSMANN MANIFOLDS,what do I? 1)introduction(together with details) 2)charts,atlas(together with details) 3)depended subjects

problem is to find a suitable function that must to be differentiable itself and its inverse.but how function and its inverse to be differentiable at (0,0)?

How am I use open sets for (0,0) of M?

can you be given a suitable smooth atlas to the subset M of plane that M to be a differentiable manifold? M={(x,y);y=absolute value of (x)}