What do S1 and S2 look like on the complex plane under e^z?

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Homework Help Overview

The discussion revolves around finding the image of two sets, S1 and S2, under the mapping defined by the exponential function \( e^z \). The sets are defined in terms of complex variables, with S1 representing a strip in the upper half of the complex plane and S2 being a sector in the first quadrant.

Discussion Character

  • Exploratory, Conceptual clarification, Problem interpretation

Approaches and Questions Raised

  • Participants express uncertainty about how to begin the problem and how to apply the given equations. There are attempts to clarify the nature of the sets S1 and S2 and their representation on the complex plane.

Discussion Status

The discussion is ongoing, with participants seeking guidance on visualizing the sets S1 and S2. Some have noted a potential answer from the professor, but there is a lack of understanding on how to derive it from the equations provided. The conversation indicates that multiple interpretations of the problem are being explored.

Contextual Notes

Participants mention a need for visualization and express confusion regarding the application of the equations related to the exponential mapping. There is an emphasis on understanding the sets in the context of the complex plane.

Polamaluisraw
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Complex Variables - Mappings under e^z

Homework Statement


Find the image of S1,S2 under ez.
S1 = {z=x+iy : 0 < y < [itex]\pi[/itex] }
S2 = {z=x+iy : x > 0, 0 < y < [itex]\pi[/itex] }



Homework Equations


w=ez
w=[itex]\rho[/itex]ei[itex]\varphi[/itex]
[itex]\rho[/itex]=ex, [itex]\varphi[/itex]=y

The Attempt at a Solution


Did not know how to get started. I don't know how to use the above equations to help me. Thank you very very much!
 
Last edited:
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Polamaluisraw said:

Homework Statement


Find the image of S1,S2 under ez.
S1 = {z=x+iy : 0 < y < [itex]\pi[/itex] }
S2 = {z=x+iy : x > 0, 0 < y < [itex]\pi[/itex] }



Homework Equations


w=ez
w=[itex]\rho[/itex]ei[itex]\varphi[/itex]
[itex]\rho[/itex]=ex, [itex]\varphi[/itex]=y

The Attempt at a Solution


Did not know how to get started. I don't know how to use the above equations to help me. Thank you very very much!
You might start by identifying what the set, S1 and S2 are.
 
The answer the professor has is {ω= u + iv : v > 0}.

I really do not understand how to use the equations and arrive here. I HAVE to be missing something simple. I really appreciate any help that can push me into the right direction
 
Polamaluisraw said:
The answer the professor has is {ω= u + iv : v > 0}.

I really do not understand how to use the equations and arrive here. I HAVE to be missing something simple. I really appreciate any help that can push me into the right direction
So, do you know what the sets S1 and S2 look like on the complex plane ?

(I tried to push you this way earlier.)
 
SammyS said:
So, do you know what the sets S1 and S2 look like on the complex plane ?

(I tried to push you this way earlier.)
I do not know what it looks like in the complex plane. What can I do to help me visualize it?
I really appreciate the help
 

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