Quaternions
ℍ
Type it
| Unicode | U+210D | |
|---|---|---|
| LaTeX | \mathbb{H} | |
| HTML entity | ℍ | |
| Character | ℍ |
Meaning
The number system a + bi + cj + dk with real a, b, c, d and i² = j² = k² = ijk = −1. Multiplication is not commutative. The letter honors Hamilton. Compare with Complex Numbers and Real Numbers.
How to read it
q ∈ ℍ
is read “q is a quaternion”.