Symbols:J/Imaginary Unit

Imaginary Unit

$j$

Used in physics and engineering to denote the imaginary unit.

This is to relieve confusion with electric current, often denoted with the letter $i$.

The $\LaTeX$ code for \(j\) is j .

Sources

• 1989: Ephraim J. Borowski and Jonathan M. Borwein: Dictionary of Mathematics ... (previous) ... (next): $j$ (Engineering and physics)
• 2014: Christopher Clapham and James Nicholson: The Concise Oxford Dictionary of Mathematics (5th ed.) ... (previous) ... (next): j
• 2021: Richard Earl and James Nicholson: The Concise Oxford Dictionary of Mathematics (6th ed.) ... (previous) ... (next): j