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.
- Complex Function
- Complexity (Number)
- Complexity (Sequence)
- Complexity Theory
- Complex Matrix
- Complex Multiplication
- Complex Number
- Complex Plane
- Complex Projective Plane
- Complex Representation
- Complex Structure
- Component
- Composite Knot
- Compositeness Certificate
- Compositeness Test
- Composite Number
- Composite Runs
- Composition
- Composition Series
- Composition Theorem
- Compound Interest
- Compound Polyhedron
- Computability
- Computable Function
- Computable Number