\text{\j}The command \text{\j} is used in LaTeX to produce the lowercase letter 'j' with a dotless variant, which is particularly useful in certain mathematical and linguistic contexts where the dot on the 'j' might interfere with other notations or symbols.
Produces a dotless lowercase 'j'.
\text{\j}Using dotless 'j' in an integral to avoid confusion with the dot notation.
\int_0^\infty f(\text{\j}) \, d\text{\j}Using dotless 'j' in complex numbers to represent the imaginary unit, avoiding confusion with other notations.
\text{\j} = \sqrt{-1}