ℍ

See also: Appendix:Variations of "h"

ℍ U+210D, ℍ
DOUBLE-STRUCK CAPITAL H
← ℌ
[U+210C] 		Letterlike Symbols ℎ →
[U+210E]

𝐇 U+1D407, 𝐇
MATHEMATICAL BOLD CAPITAL H
← 𝐆
[U+1D406] 		Mathematical Alphanumeric Symbols 𝐈 →
[U+1D408]

Translingual

Alternative forms

Etymology

From 𝐇, after the first letter of the surname of William Rowan Hamilton (1805–1865). The usage of blackboard bold dates to the 1960s.

Symbol

ℍ

  1. (mathematics) alternative form of 𝐇, the set of quaternions
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