Re symbol

  • Thread starter nkk2008
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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
 

Doc Al

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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.
 

berkeman

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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
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
 
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