i | √{−1} (Engelsk)
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Definition
The first imaginary number; it is defined by saying that i2 = −1. Note that because i does not lie on the real number line, it is neither greater than nor less than 1. [i\vec] is also used to denote the unit vector in the x direction: x = (
) in two dimensions or x = (
) in three dimensions. Capital I is used to denote the identity mapping, or the identity matrix.
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Relations
- bredere:
- (en) English letters
- (en) Imaginary number
- (en) Unit vector
- se også:
- (en) j
- (en) k
Støttet af: