The limit of the complex conjugate as z -> 0

In summary, the conversation revolved around the behavior of the complex conjugate of z as z approaches zero and the derivative of z- with respect to z. The map f(z)= conjugate of z is not differentiable and complex limits can be calculated by breaking them up into their real and imaginary parts. The limit of Log z as z approaches 0 is also discussed.
  • #1
skriabin
11
0
Hi I'm wondering if the z- (complex conjugate of z) goes to zero as z does? Also what is the derivative of z- with respect to z? Thanks
 
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  • #2
This is very important for me right now, so please if you know this, let me know... :)
 
  • #3
The map f(z)= conjugate of z is not differentiable, and you should be able to prove this from the definition.

Do you know how to calculate complex limits by breaking them up into their real and imaginary parts? It makes looking at that limit very easy
 
  • #4
Thank you. Got it.
 
  • #5
While we're on the subject of complex limits, can anyone help me figure out what
[tex]
\lim_{z\to 0} \text{Log } z
[/tex]
is? (So we're talking about the principal logarithm here.)
 

FAQ: The limit of the complex conjugate as z -> 0

What is the complex conjugate of a number?

The complex conjugate of a number is formed by changing the sign of the imaginary part of the number. For example, the complex conjugate of 3 + 4i is 3 - 4i.

What does it mean for a complex number to approach zero?

When we say that a complex number is approaching zero, we mean that the distance between the number and zero is getting smaller and smaller. This is similar to approaching a limit in calculus, where the input approaches a certain value but never quite reaches it.

How do we find the limit of the complex conjugate as z -> 0?

To find the limit of the complex conjugate as z -> 0, we can use the algebraic definition of a limit. This means that we substitute 0 for z in the expression and simplify the resulting equation. The resulting value is the limit of the complex conjugate as z -> 0.

What is the significance of the limit of the complex conjugate as z -> 0?

The limit of the complex conjugate as z -> 0 is important in understanding the behavior of complex functions at the origin. It can also help us determine if a complex function is continuous at z = 0, and can provide insights into the behavior of the function in other parts of the complex plane.

Are there any real-world applications for the limit of the complex conjugate as z -> 0?

Yes, the concept of the limit of the complex conjugate as z -> 0 has many applications in engineering, physics, and other scientific fields. For example, it is used in signal processing to analyze the behavior of signals near the origin, and in control systems to understand the stability of a system at the origin.

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