What is the Meaning of Re(function)?

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Re(function) refers to the real part of a complex number, commonly denoted as Re(z), where z is a complex variable. This notation is distinct from the Riemann zeta function, which uses a lowercase zeta. The discussion clarifies that Re is not the same as the script R. The context of using Re in equations aligns with the concept of extracting the real part of complex numbers. Overall, the clarification resolves the initial confusion regarding the symbol's meaning.
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I have seen the symbol Re(function) used. What does the Re stand for? I thought it was the Riemann zeta function, but I am pretty sure I am wrong (that is a lower case zeta...obviously). Is it the same as the script R?

I know this is a basic question, but I could not find documents online that clearly stated what Re was.

Thanks
Nkk
 
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I'm no mathematician, but Re(z) stands for the real part of z. (Relevant where z is complex.)

Im(z) would be the imaginary part.
 
nkk2008 said:
I have seen the symbol Re(function) used. What does the Re stand for? I thought it was the Riemann zeta function, but I am pretty sure I am wrong (that is a lower case zeta...obviously). Is it the same as the script R?

I know this is a basic question, but I could not find documents online that clearly stated what Re was.

Thanks
Nkk

Sometimes it is used to designate taking the real part of a complex number. Does that fit the context, or is that too simplistic?


EDIT -- Oops, Doc beat me on the tie!
 
Last edited:
Thank you both. Now that you both said it, it seems really obvious.

The equation I was looking at was:
f07592ed67ae0ecb6ebb466182fcfbde.png


Taking the real part makes sense, and fits well.

Thanks again,
Nkk
 
Last edited by a moderator:

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