Symbols used in these Pages

These pages use various mathematical symbols. This page, created largely for my own convenience, shows how you can present these (and some other mathematical) symbols in HTML.

×	×	direct product
⋊	⋊	semidirect product
↑	↑	central extension
⋊↑	<span class=ova>⋊<span class=ovr>↑</span></span>	mixed extension
≅	≅	isomorphic
≈	≈	isomorphic
⊂	⊂	subgroup
⊃	⊃	subgroup
⊲	⊲	normal subgroup
⊳	⊳	normal subgroup

< k \| k² >	<span class="ab"><</span> k \| k<sup>2</sup> <span class="ab">></span>	presentation
C₂²	C<sub>2</sub><sup class=lefted>2</sup>	Klein group

∈	∈	member of
∉	∉	not member of
≤	≤	less than or equal to
≥	≥	greater than or equal to
∃	∃	there exists
∀	∀	for all

ℂ	ℂ	complex
ℍ	ℍ	quaternion
ℕ	ℕ	natural
ℙ	ℙ	prime
ℚ	ℚ	rational
ℝ	ℝ	real
ℤ	ℤ	integer

ℵ	ℵ	aleph
ε	ε	epsilon, identity
∏	∏	Pi
∑	∑	Sigma
Ω	Ω	Omega
θ	θ	theta
π	π	pi
φ	φ	phi
ψ	ψ	psi
ω	ω	omega

∈	∊	is a member of
∊	∊	is a member of
∀	∀	for all
∃	∃	there exists
∄	∄	there does not exist
∞	∞	infinity
∩	∩	intersection
∪	∪	union
→	→	single-headed arrow
↔	↔	double-headed arrow

The html with a background this yellow colour depends on styles. To get these to work you can copy this page's stylesheet. Note that it has a bodge to make it work with both FireFox and Internet Explorer.

Lines with a background this colour this pink colour used to work with modern browsers until FireFox version 3 was released. This recent release of FireFox fails (on my Windows system) to display certain unicode characters that older versions displayed correctly. You may be able to fix this (as I have in this page) by setting style="font-family: 'Lucida Sans Unicode';" either for the whole page, or for those particular characters.

More miscellaneous short pages on finite groups
More pages on groups