i
The Imaginary Number 
is defined as 
. However, for some reason engineers and physicistsprefer the symbol j to . Numbers of the form 
where 
and 
are Real Numbers are called Complex Numbers, and when 
is used to denote a Complex Number, it issometimes (in older texts) called an ``Affix.''
The Square Root of is
 | (1) |
 | (2) |
, | (3) |
 | (4) |
The Principal Value of 
is
 | (5) |
References
Courant, R. and Robbins, H. What is Mathematics?: An Elementary Approach to Ideas and Methods, 2nd ed. Oxford, England: Oxford University Press, p. 89, 1996.
- Vertex Degree
- Vertex Enumeration
- Vertex Figure
- Vertex (Graph)
- Vertex (Parabola)
- Vertex (Polygon)
- Vertex (Polyhedron)
- Vertex (Polytope)
- Vertical
- Vertical-Horizontal Illusion
- Vertical Perspective Projection
- Vertical Tangent
- Vesica Piscis
- Vibration Problem
- Vickery Auction
- Viergruppe
- Vieta's Substitution
- Vigesimal
- Vigintillion
- Villarceau Circles
- Vinculum
- Vinogradov's Theorem
- Virtual Group
- Visibility
- Visible Point