Symbols:I

Roman Numeral

 * $\mathrm I$ or $\mathrm i$

The Roman numeral for $1$.

Imaginary Part

 * $\map \Im z$ or $\map {\operatorname {Im} } z$

The imaginary part of a complex number $z$.

Variants
Variants of $\map {\operatorname {Im} } z$ and $\map \Im z$ that can often be found are:


 * $\map {\operatorname {\mathscr I} } z$
 * $\map {\operatorname {im} } z$

Image

 * $\operatorname {Img}$

Denotes the image of a relation or the image of a mapping.