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Notes on LaTeX symbols and usage.

Symbols I use the most

Text modification

Some of the frequently used symbols:
superscript - \textsuperscript{th}
subscript    - \textsubscript{s}
infinity       - \infty
dash            - the latex command is "---"
How to type single bond, double bond and triple bonds in LaTeX (for chemists)?
I found following is useful for Chemists.

https://www.overleaf.com/learn/latex/Chemistry_formulae


How to add multi-line comments in LaTeX?.

\iffalse
Comment text that you don't want to appear in paper.
\fi

Next question will appear here. 

next
anserComment 
will appear here.

See this page on Wikipedia 

Letters

 \alpha
 \beta
 \gamma
 \delta
 \epsilon
 \zeta
 \eta
 \theta
 \iota
 \kappa
 \lambda
 \mu
 \nu
 \xi
 \omicron
 \pi
 \rho
 \sigma
 \tau
 \upsilon
 \phi
 \chi
 \psi
 \omega
 \varepsilon
 \vartheta
 \varkappa
 \varpi
 \varrho
 \varphi
 \varsigma
 \Gamma
 \Delta
 \Theta
 \Lambda
 \Upsilon
 \Xi
 \Phi
 \Pi
 \Psi
 \Sigma
 \Omega
 \digamma
 \aleph
 \beth
 \gimel
 \daleth
 \forall
 \exists
 \nexists
 \Finv
 \Game
 \backepsilon
 \imath
 \jmath
 \ell
 \Bbbk
 \amalg
 \nabla
 \mho
 \partial
 \eth
 \hbar
 \hslash
 \Im
 \Re
 \wp
 \O
 \emptyset
 \varnothing
 \complement
 \circledS
 \acute{a}
 \hat{a}
 \ddot{a}
 \bar{a}
 \tilde{a}
 \grave{a}
 \check{a}
 \dot{a}
 \breve{a}
 \vec{a}
 \prime
 \backprime
 \P
 \S
 \AA
 \frac{abc}{def}
 \sqrt{abc}
 \sqrt[n]{abc}
 \overline{abc}
 \underline{abc}
 \overrightarrow{abc}
 \overleftarrow{abc}
 \overbrace{abc}
 \underbrace{abc}
 \widehat{abc}

Fonts

 \mathcal{A}
 \mathbb{A}
 \mathfrak{A}
 \mathsf{A}
 \mathbf{A}
 \textbf{A}

Common functions

 \sin
 \arcsin
 \sinh
 \cos
 \arccos
 \cosh
 \tan
 \arctan
 \tanh
 \cot
 \coth
 \sec
 \csc
 \exp
 \log
 \ln
 \lg
 \min
 \max
 \inf
 \sup
 \lim
 \liminf
 \limsup
 \arg
 \deg
 \det
 \dim
 \gcd
 \hom
 \ker
 \Pr

Big symbols

 \prod
 \bigcap
 \bigwedge
 \coprod
 \bigcup
 \bigvee
 \bigsqcup
 \sum
 \biguplus
 \bigoplus
 \bigotimes
 \bigodot
 \int
 \oint
 \iint
 \iiint
 \iiiint

Arrows

 \leftarrow
 \Leftarrow
 \leftharpoonup
 \leftharpoondown
 \leftleftarrows
 \rightarrow
 \Rightarrow
 \rightharpoonup
 \rightharpoondown
 \rightrightarrows
 \uparrow
 \Uparrow
 \upharpoonleft
 \upharpoonright
 \upuparrows
 \downarrow
 \Downarrow
 \downharpoonleft
 \downharpoonright
 \downdownarrows
 \longleftarrow
 \Longleftarrow
 \hookleftarrow
 \leftrightharpoons
 \leftrightarrows
 \Lleftarrow
 \Lsh
 \leftarrowtail
 \twoheadleftarrow
 \curvearrowleft
 \circlearrowleft
 \looparrowleft
 \longrightarrow
 \Longrightarrow
 \hookrightarrow
 \rightleftharpoons
 \rightleftarrows
 \Rrightarrow
 \Rsh
 \rightarrowtail
 \twoheadrightarrow
 \curvearrowright
 \circlearrowright
 \looparrowright
 \leftrightarrow
 \longleftrightarrow
 \updownarrow
 \nleftarrow
 \nrightarrow
 \nleftrightarrow
 \Leftrightarrow
 \Longleftrightarrow
 \Updownarrow
 \nLeftarrow
 \nRightarrow
 \nLeftrightarrow
 \mapsto
 \longmapsto
 \multimap
 \rightsquigarrow
 \leftrightsquigarrow
 \swarrow
 \searrow
 \nwarrow
 \nearrow

Order symbols

Some of the following symbols require \usepackage{amssymb} in the preamble
 <
 \leq
 \leqq
 \leqslant
 >
 \geq
 \geqq
 \geqslant
 \nless
 \nleq
 \lneq
 \nleqq
 \lneqq
 \lvertneqq
 \nleqslant
 \ngtr
 \ngeq
 \gneq
 \ngeqq
 \gneqq
 \gvertneqq
 \ngeqslant
 \vartriangleleft
 \trianglelefteq
 \lesssim
 \lessapprox
 \prec
 \preceq
 \precsim
 \precapprox
 \vartriangleright
 \trianglerighteq
 \gtrsim
 \gtrapprox
 \succ
 \succeq
 \succsim
 \succapprox
 \ntriangleleft
 \ntrianglelefteq
 \lnsim
 \lnapprox
 \nprec
 \npreceq
 \precnsim
 \precnapprox
 \ntriangleright
 \ntrianglerighteq
 \gnsim
 \gnapprox
 \nsucc
 \nsucceq
 \succnsim
 \succnapprox
 \eqslantless
 \lessgtr
 \lesseqgtr
 \lesseqqgtr
 \eqslantgtr
 \gtrless
 \gtreqless
 \gtreqqless
 \ll
 \lll
 \lessdot
 \preccurlyeq
 \curlyeqprec
 \gg
 \ggg
 \gtrdot
 \succcurlyeq
 \curlyeqsucc

Set symbols

 \subset
 \Subset
 \sqsubset
 \triangleleft
 \blacktriangleleft
 \supset
 \Supset
 \sqsupset
 \triangleright
 \blacktriangleright
 \cap
 \Cap
 \sqcap
 \vartriangle
 \blacktriangle
 \cup
 \Cup
 \sqcup
 \triangledown
 \blacktriangledown
 \in
 \subseteq
 \subseteqq
 \sqsubseteq
 \ni
 \supseteq
 \supseteqq
 \sqsupseteq
 \notin
 \nsubseteq
 \subsetneq
 \varsubsetneq
 \nsubseteqq
 \subsetneqq
 \varsubsetneqq
 \uplus
 \nsupseteq
 \supsetneq
 \varsupsetneq
 \nsupseteqq
 \supsetneqq
 \varsupsetneqq

Equality and inference

 =
 \neq
 \equiv
 \thickapprox
 \approx
 \approxeq
 \cong
 \ncong
 \sim
 \thicksim
 \nsim
 \simeq
 \backsim
 \backsimeq
 \eqsim
 \doteq
 \div
 \doteqdot
 \fallingdotseq
 \risingdotseq
 \triangleq
 \circeq
 \eqcirc
 \bumpeq
 \Bumpeq
 \asymp
 \mid
 \shortmid
 \vdash
 \dashv
 \Vdash
 \parallel
 \shortparallel
 \vDash
 \Vvdash
 \models
 \nmid
 \nshortmid
 \nvdash
 \nVdash
 \nparallel
 \nshortparallel
 \nvDash
 \nVDash

Brackets

 \lfloor
 \llcorner
 \rfloor
 \lrcorner
 \lceil
 \ulcorner
 \rceil
 \urcorner
 |
 \vert
 \|
 \Vert
 \{
 \}
 \langle
 \rangle
 /
 \backslash
 [
 ]
 (
 )

Other symbols

 \infty
 \propto
 \varpropto
 \bowtie
 \ltimes
 \rtimes
 \intercal
 \dotplus
 \times
 \wr
 \pitchfork
 \surd
 \setminus
 \diagdown
 \diagup
 \leftthreetimes
 \rightthreetimes
 \perp
 \between
 \asymp
 \angle
 \measuredangle
 \sphericalangle
 \bot
 \wedge
 \barwedge
 \doublebarwedge
 \therefore
 \top
 \vee
 \veebar
 \because
 \pm
 \curlywedge
 \smallfrown
 \frown
 \bigtriangleup
 \triangle
 \mp
 \curlyvee
 \smallsmile
 \smile
 \bigtriangledown
 \cdot
 \circ
 \bullet
 \centerdot
 \cdots
 \vdots
 \ldots
 \ddots
 \circledcirc
 \circleddash
 \circledast
 \bigcirc
 \divideontimes
 \odot
 \oplus
 \ominus
 \otimes
 \oslash
 \boxdot
 \boxplus
 \boxminus
 \boxtimes
 \Box
 \diamondsuit
 \clubsuit
 \heartsuit
 \spadesuit
 \lozenge
 \blacklozenge
 \square
 \blacksquare
 \diamond
 \Diamond
 \ast
 \star
 \bigstar
 \sharp
 \flat
 \natural
 \dagger
 \ddagger


Alphabets with special characters on it.

LaTeX commandSampleDescription
\`{o}ògrave accent
\'{o}óacute accent
\^{o}ôcircumflex
\"{o}öumlaut, trema or dieresis
\H{o}őlong Hungarian umlaut (double acute)
\~{o}õtilde
\c{c}çcedilla
\k{a}ąogonek
\l{}łbarred l (l with stroke)
\={o}ōmacron accent (a bar over the letter)
\b{o}obar under the letter
\.{o}ȯdot over the letter
\d{u}dot under the letter
\r{a}åring over the letter (for å there is also the special command \aa)
\u{o}ŏbreve over the letter
\v{s}šcaron/háček ("v") over the letter
\t{oo}o͡o"tie" (inverted u) over the two letters
\oøslashed o (o with stroke)


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