MHB Map of Area Bounded by y=5x & y=-3x in Upper Plane

  • Thread starter Thread starter Amer
  • Start date Start date
  • Tags Tags
    Complex Mapping
Amer
Messages
259
Reaction score
0
what is the map of the area bound by y=5x and y=-3x in the upper half plane, under w=1/z we have the lines : $ z(t) = t + 5t i $ , and the line $z(t) = t - 3ti $
Fist line
$\displaystyle w_1 = \dfrac{1}{t+5ti} = \dfrac{1}{26t} - \dfrac{5i}{26t} $
Second
$\displaystyle w_2 = \dfrac{1}{t - 3ti} = \dfrac{1}{10t} + \dfrac{3i}{10t} $

We get the lines in the uv plane

$v = -5u \; , v=3u $
taking a point in the area for example (0,1) under 1/z (0,1) so we will take the bounded area between $v = -5u \; , v=3u $ which has the point (0,1)
is that right ?
Thanks
 
Physics news on Phys.org
You have correctly found the boundary lines as $v = -5u$ and $v=3u $. But if the original area in the $z$-plane contains the point $(0,1)$ then the image in the $w$-plane should contain the image of that point under the map $w=1/z$.
 
We all know the definition of n-dimensional topological manifold uses open sets and homeomorphisms onto the image as open set in ##\mathbb R^n##. It should be possible to reformulate the definition of n-dimensional topological manifold using closed sets on the manifold's topology and on ##\mathbb R^n## ? I'm positive for this. Perhaps the definition of smooth manifold would be problematic, though.

Similar threads

Replies
1
Views
1K
  • · Replies 4 ·
Replies
4
Views
2K
  • · Replies 1 ·
Replies
1
Views
3K
  • · Replies 2 ·
Replies
2
Views
3K
  • · Replies 56 ·
2
Replies
56
Views
10K
  • · Replies 67 ·
3
Replies
67
Views
11K
  • · Replies 3 ·
Replies
3
Views
3K
  • · Replies 39 ·
2
Replies
39
Views
13K
  • · Replies 121 ·
5
Replies
121
Views
23K
  • · Replies 3 ·
Replies
3
Views
2K