List of mathematical symbols

The following mathematical symbols are used differently from Wikipedia:

Symbol	Usage	Interpretation	Article	LaTeX	HTML	Unicode
[math]\displaystyle{ \widetilde{} }[/math]	[math]\displaystyle{ \tilde{a} }[/math]	Reciprocal of [math]\displaystyle{ a }[/math]: [math]\displaystyle{ 1/a }[/math] resp. [math]\displaystyle{ a^{-1} }[/math] for [math]\displaystyle{ a \ne 0 }[/math] (read as "turn")		\widetilde{}		U+007E
[math]\displaystyle{ \acute{} }[/math]	[math]\displaystyle{ \acute{a} }[/math]	Increment of [math]\displaystyle{ a }[/math]: [math]\displaystyle{ a - 1 }[/math] (read as "dec")		\acute{}		U+00B4
[math]\displaystyle{ \grave{} }[/math]	[math]\displaystyle{ \grave{a} }[/math]	Decrement of [math]\displaystyle{ a }[/math]: [math]\displaystyle{ a + 1 }[/math] (read as "inc")		\grave{}		U+0060
[math]\displaystyle{ \widehat{} }[/math]	[math]\displaystyle{ \hat{a} }[/math]	Double of [math]\displaystyle{ a }[/math]: [math]\displaystyle{ 2a }[/math] (read as "hat")		\widehat{}		U+0302
[math]\displaystyle{ \check{} }[/math]	[math]\displaystyle{ \check{a} }[/math]	Half of [math]\displaystyle{ a }[/math]: [math]\displaystyle{ a/2 }[/math] (read as "half")		\widecheck{}		U+02C7
[math]\displaystyle{ \text{-} }[/math]	[math]\displaystyle{ a\text{-} }[/math]	[math]\displaystyle{ a }[/math] negated: [math]\displaystyle{ a\text{-} }[/math] (read as "neg")		\text{-}		U+002D
_	[math]\displaystyle{ z = a + \underline{b} }[/math]	Complex part of [math]\displaystyle{ z }[/math]: [math]\displaystyle{ \underline{1}b }[/math] with imaginary unit [math]\displaystyle{ \underline{1} }[/math] (read as "comp")		\underline{}		U+005F
[math]\displaystyle{ \nu }[/math]	[math]\displaystyle{ {}^{\nu} A }[/math]	greatest        finite number: intersection of the complex or real set [math]\displaystyle{ A }[/math] for [math]\displaystyle{ {}^{\nu}\mathbb{C} := [-\nu, \; \nu] + \underline{1}[-\nu, \nu] }[/math]		\nu	ν	U+03BD
[math]\displaystyle{ \omega }[/math]	[math]\displaystyle{ {}^{\omega} A }[/math]	greatest mid-finite number: intersection of the complex or real set [math]\displaystyle{ A }[/math] for [math]\displaystyle{ {}^{\omega}\mathbb{C} := [-\omega, \omega] + \underline{1}[-\omega, \omega] }[/math]		\omega	ω	U+03C9
[math]\displaystyle{ \iota }[/math]	[math]\displaystyle{ \iota = \min \mathbb{R}_{\gt 0} }[/math]	smallest positive real number		\iota	ι	U+03B9
[math]\displaystyle{ {}_b }[/math]	[math]\displaystyle{ {}_b a = \log_b a }[/math]	Logarithm to base [math]\displaystyle{ b }[/math] for [math]\displaystyle{ a \in \mathbb{C} \setminus \mathbb{R}_{\le 0} }[/math] (read as "b log a")		{}_b
[math]\displaystyle{ {}_1 }[/math]	[math]\displaystyle{ {}_1 x = x/||x|| }[/math]	Unit vector to [math]\displaystyle{ x \ne 0 }[/math]		{}_1
[math]\displaystyle{ \infty }[/math]	[math]\displaystyle{ \infty \gg \tilde{\iota}^2 }[/math]	Replacing [math]\displaystyle{ \pm0 }[/math] by [math]\displaystyle{ \pm\widetilde{\infty} }[/math]	Infinity	\infty	∞	U+221E
[math]\displaystyle{ \mathbb M }[/math]	[math]\displaystyle{ {\mathbb{M}}_{\mathbb{R}} = {}^{\omega}{\mathbb{R}} \setminus {}^{\nu}{\mathbb{R}} }[/math]	mid-finite numbers: [math]\displaystyle{ {\mathbb{M}}_{\mathbb{C}} := {\mathbb{M}}_{\mathbb{R}} + \underline{\mathbb{M}}_{\mathbb{R}} }[/math]		\mathbb{M}	𝕄	U+1D544
[math]\displaystyle{ {}^{\dot{}} }[/math]	[math]\displaystyle{ \dot{A} }[/math]	point-symmetric set [math]\displaystyle{ A }[/math]		\dot	˙	U+02D9
[math]\displaystyle{ {}^{\ll} }[/math]	[math]\displaystyle{ A^{\ll} }[/math]	Set [math]\displaystyle{ A }[/math] without boundary [math]\displaystyle{ \partial A }[/math] given by min [math]\displaystyle{ \{d(x, y) : x \in A°, y \in A^{\prime}\} = \tilde{\nu} }[/math]		{}^{\ll}	≪	U+226A
[math]\displaystyle{ ' }[/math]	[math]\displaystyle{ A' }[/math]	Complement of the set [math]\displaystyle{ A }[/math]	Complement	'		U+0027
[math]\displaystyle{ \leftharpoonup }[/math]	[math]\displaystyle{ \overset{\leftharpoonup}{a} }[/math]	Predecessor of [math]\displaystyle{ a }[/math] (read as "pre")		\leftharpoonup		U+21BC
[math]\displaystyle{ \rightharpoonup }[/math]	[math]\displaystyle{ \overset{\rightharpoonup}{a} }[/math]	Successor of [math]\displaystyle{ a }[/math] (read as "post")		\rightharpoonup		U+21C0
[math]\displaystyle{ \upharpoonleft }[/math]	[math]\displaystyle{ a{\upharpoonleft}_n }[/math]	[math]\displaystyle{ n }[/math]-fold repetition of [math]\displaystyle{ a }[/math] in the form [math]\displaystyle{ (a, ... , a)^T }[/math] (read as "rep")	Repetition	\upharpoonleft		U+21BF
[math]\displaystyle{ \upharpoonright }[/math]	[math]\displaystyle{ a{\upharpoonright}_n }[/math]	Projection of [math]\displaystyle{ (a_1, ... , a_n)^T }[/math] onto the [math]\displaystyle{ k }[/math]-th entry [math]\displaystyle{ a_k }[/math] (read as "proj")	Projection	\upharpoonright		U+21BE
[math]\displaystyle{ \downarrow }[/math]	[math]\displaystyle{ \downarrow {x} }[/math]	Differential of [math]\displaystyle{ x }[/math] (read as "down")	Differential	\downarrow	↓	U+8595
[math]\displaystyle{ \uparrow }[/math]	[math]\displaystyle{ \uparrow f(x) }[/math]	Integral of [math]\displaystyle{ f(x) }[/math] (read as "up")	Integral	\uparrow	↑	U+8593
[math]\displaystyle{ \Box }[/math]		End of proof	Proof	\Box		U+25A1
[math]\displaystyle{ \triangle }[/math]		End of definition	Definition	\triangle	Δ	U+2206

See also

• List of mathematical symbols