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$\begingroup$

Title says it all. What's more common? Is there one to prefere (maybe due to some norm)?

This:

$\operatorname{\mathfrak{R}} z, \operatorname{\mathfrak{I}} z$

or that:

$\operatorname{Re}z, \operatorname{Im}z$ ?

  • 1
    I am not sure I have ever seen even a single text which used $\Re$ and $\Im$.2015-10-26

2 Answers 2

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I lean towards readability and I find $\operatorname{Re}z$ and $\operatorname{Im}z$ unambiguously clear.

  • 0
    Oh I see it now.2015-12-20
3

I prefer the fraktur notation. Firstly, it looks much more elegant. Secondly, it is unambiguous (for instance, Re is often used for Reynolds number).