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Roman Numeral

$\mathrm I$ or $\mathrm i$

The Roman numeral for $1$.

Its $\LaTeX$ code is \mathrm I  or \mathrm i.

Imaginary Part

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

The imaginary part of a complex number $z$.

The $\LaTeX$ code for \(\map \Im z\) is \map \Im z .

The $\LaTeX$ code for \(\map {\operatorname {Im} } z\) is \map {\operatorname {Im} } z .

Image (Set Theory)

$\operatorname {Img}$

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

The $\LaTeX$ code for \(\Img {\mathcal R}\) is \Img {\mathcal R} .