Definition:Imaginary Part/Also denoted as

Imaginary Part: Also denoted as
Variants of $\map \Im z$ for the imaginary part of a complex number $z$ are:


 * $\map {\mathrm {Im} } z$
 * $\map {\mathscr I} z$
 * $\map {\mathrm {im} } z$
 * $\map {\mathfrak I} z$
 * $\map {\mathbf I} z$ or $\mathbf I z$

While the fraktur font is falling out of fashion, because of its cumbersome appearance and difficulty to render in longhand, its use for this application is conveniently unambiguous.