Math alphabet / Mathvariant 
TeX's math alphabet  macros change font features of (some) letters and
digits. Non-alphanumerical symbols, function names, and mathematical text
are left unchanged.
default:  
V R x ± cos ( α out ) ≈ 3 Γ ∀ x ∈ ℝ V_R x \pm \cos(\alpha_\text{out}) \approx 3 \Gamma
\quad \forall x \in \mathbb{R} 
mathrm:  
V R x ± cos ( α out ) ≈ 3 Γ ∀ x ∈ ℝ \mathrm{V_R x \pm \cos(\alpha_\text{out}) \approx 3 \Gamma
\quad \forall x \in \mathbb{R}} 
mathbf:  
𝐕 𝐑 𝐱 ± cos ( 𝛂 out ) ≈ 3 𝚪 ∀ 𝐱 ∈ ℝ \mathbf{V_R x \pm \cos(\alpha_\text{out}) \approx 3 \Gamma
\quad \forall x \in \mathbb{R}} 
mathit:  
𝑉 𝑅 𝑥 ± cos ( 𝛼 out ) ≈ 3 𝛤 ∀ 𝑥 ∈ ℝ \mathit{V_R x \pm \cos(\alpha_\text{out}) \approx 3 \Gamma
\quad \forall x \in \mathbb{R}} 
mathbfit:  
𝑽 𝑹 𝒙 ± cos ( 𝜶 out ) ≈ 3 𝜞 ∀ 𝒙 ∈ ℝ \mathbfit{V_R x \pm \cos(\alpha_\text{out}) \approx 3 \Gamma
\quad \forall x \in \mathbb{R}} 
mathbb:  
𝕍 ℝ 𝕩 ± cos ( α out ) ≈ 3 ℾ ∀ 𝕩 ∈ ℝ \mathbb{V_R x \pm \cos(\alpha_\text{out}) \approx 3 \Gamma
\quad \forall x \in \mathbb{R}} 
mathcal:  
𝒱 ℛ 𝓍 ± cos ( α out ) ≈ 3 Γ ∀ 𝓍 ∈ ℝ \mathcal{V_R x \pm \cos(\alpha_\text{out}) \approx 3 \Gamma
\quad \forall x \in \mathbb{R}} 
mathscr:  
𝒱 ℛ 𝓍 ± cos ( α out ) ≈ 3 Γ ∀ 𝓍 ∈ ℝ \mathscr{V_R x \pm \cos(\alpha_\text{out}) \approx 3 \Gamma
\quad \forall x \in \mathbb{R}} 
mathfrak:  
𝔙 ℜ 𝔵 ± cos ( α out ) ≈ 3 Γ ∀ 𝔵 ∈ ℝ \mathfrak{V_R x \pm \cos(\alpha_\text{out}) \approx 3 \Gamma
\quad \forall x \in \mathbb{R}} 
mathsf:  
𝖵 𝖱 𝗑 ± cos ( α out ) ≈ 3 Γ ∀ 𝗑 ∈ ℝ \mathsf{V_R x \pm \cos(\alpha_\text{out}) \approx 3 \Gamma
\quad \forall x \in \mathbb{R}} 
mathsfit:  
𝘝 𝘙 𝘹 ± cos ( α out ) ≈ 3 Γ ∀ 𝘹 ∈ ℝ \mathsfit{V_R x \pm \cos(\alpha_\text{out}) \approx 3 \Gamma
\quad \forall x \in \mathbb{R}} 
mathsfbfit:  
\mathsfbfit{V_R x \pm \cos(\alpha_\text{out}) \approx 3 \Gamma
\quad \forall x \in \mathbb{R}} 
System Message: WARNING/2 (/usr/local/src/docutils-git-svn/docutils/test/functional/input/data/math_experiments.txt , line 35)
TeX to MathML converter `pandoc` failed:
[WARNING] Could not convert TeX math '\mathsfbfit{V_R x \pm \cos(\alpha_\text{out}) \approx 3 \Gamma
  \quad \forall x \in \mathbb{R}}', rendering as TeX:
  \mathsfbfit{V_R x \pm \cos(\alpha_\text{ 
             ^
  unexpected "{"
  expecting "%", "\\label", "\\nonumber" or whitespace
 
mathbfsfit:  
𝙑 𝙍 𝙭 ± cos ( 𝞪 out ) ≈ 3 𝞒 ∀ 𝙭 ∈ ℝ \mathbfsfit{V_R x \pm \cos(\alpha_\text{out}) \approx 3 \Gamma
\quad \forall x \in \mathbb{R}} 
mathtt:  
𝚅 𝚁 𝚡 ± cos ( α out ) ≈ 3 Γ ∀ 𝚡 ∈ ℝ \mathtt{V_R x \pm \cos(\alpha_\text{out}) \approx 3 \Gamma
\quad \forall x \in \mathbb{R}} 
 
MathML 4 defines the mathvariant  style attribute , in MathML core,
characters from the Mathematical Alphanumeric Symbols  Unicode block
are used.
The mathvariants bold-script , bold-fraktur , and sans-bold  are
rarely used. They are currently not supported by Docutils's native MathML
output. In LaTeX, \mathbfscr  and \mathbffrac  is supported by the
mathalpha  package.
Bold variants of any symbol can be achieved in combination with the
\boldsymbol  command, e.g.
bold-fraktur:  
𝔙 ℜ 𝔵 \boldsymbol{\mathfrak{V_R x}} 
 
Note, that \boldsymbol  emboldens also non-alphanumerical symbols.
Complex Example 
From the baskervaldx  package documentation:
Simplest form of the Central Limit Theorem : 
Let X 1 , X 2 , ⋯ X_1, X_2,\cdots 0 0 1 1 ( Ω , ℱ , ℙ ) (\Omega,\mathcal{F},\mathbb{P}) 
ℙ ( X 1 + ⋯ + X n n ≤ y ) → 𝔑 ( y ) ≔ ∫ − ∞ y e − t 2 / 2 2 π d t as  n → ∞ , \mathbb{P}\left(\frac{X_1+\cdots+X_n}{\sqrt{n}} \le y\right)
\to\mathfrak{N}(y)
\coloneq \int_{-\infty}^y
  \frac{\mathrm{e}^{-t^2/2}}{\sqrt{2\mathrm{\pi}}}\, \mathrm{d}t
\quad\mbox{as $n\to\infty$,}  
or, equivalently, letting S n ≔ ∑ 1 n X k S_n\coloneq\sum_1^n X_k 
𝔼 f ( S n / n ) → ∫ − ∞ ∞ f ( t ) e − t 2 / 2 2 π d t as  n → ∞ ,
 for every  f ∈ b 𝒞 ( ℝ ) . \mathbb{E} f\left(S_n/\sqrt{n}\right)
\to \int_{-\infty}^\infty f(t)
  \frac{\mathrm{e}^{-t^2/2}}{\sqrt{2\mathrm{\pi}}}\, \mathrm{d}t
\quad\mbox{as $n\to\infty$,
  for every $f\in\mathrm{b} \mathcal{C}(\mathbb{R})$.}  
 
 
 
Inferred <mrow>s in MathML 
The elements <msqrt>, <mstyle>, <merror>, <mpadded>, <mphantom>, <menclose>,
<mtd>, <mscarry>, and <math> treat their contents as a single inferred mrow
formed from all their children.
a = \sqrt 2 + x,\quad
b = \sqrt{1+x^2},\quad
c = \sqrt\frac{\sin(x)}{23},
 
System Message: WARNING/2 (/usr/local/src/docutils-git-svn/docutils/test/functional/input/data/math_experiments.txt , line 91)
TeX to MathML converter `pandoc` failed:
[WARNING] Could not convert TeX math 'a = \sqrt 2 + x,\quad
  b = \sqrt{1+x^2},\quad
  c = \sqrt\frac{\sin(x)}{23},', rendering as TeX: 
  c = \sqrt\frac{\sin(x)}{23},
                ^
  unexpected "{"
  expecting "%", "\\label", "\\nonumber" or whitespace
 
inline: a = \sqrt 2 + x, b = \sqrt{1+x^2}, c = \sqrt\frac{\sin(x)}{23} .
System Message: WARNING/2 (/usr/local/src/docutils-git-svn/docutils/test/functional/input/data/math_experiments.txt , line 95)
TeX to MathML converter `pandoc` failed:
[WARNING] Could not convert TeX math 'a = \sqrt 2 + x, b = \sqrt{1+x^2}, c = \sqrt\frac{\sin(x)}{23}', rendering as TeX:
  ^2}, c = \sqrt\frac{\sin(x)}{23}
                     ^ 
  unexpected "{"
  expecting "%", "\\label", "\\nonumber" or whitespace
 
 
Big delimiters and symbols 
Compare automatic sizing with fixed sizes:
\left( 3                          \right)
\left( f(x)                       \right)
\left( \bar x                     \right)
\left( \overline x                \right)
\left( n_i                        \right) &= () \\
\left( \underline x               \right) &= \bigl(\text{big}\bigr)\\
\left( 3^2                        \right)
\left( \sqrt{3}                   \right)
\left( \sqrt{3^2}                 \right)
\left( \sum                       \right)
\left( \bigotimes                 \right)
\left( \prod                      \right) &= \Bigl(\text{Big}\Bigr)\\
\left( \frac{3  }{2}              \right)
\left( \frac{3^2}{2^4}            \right)
\binom{3  }{2}
\begin{pmatrix} a & b \\ c & d \end{pmatrix}
\left( \frac{1}{\sqrt 2}          \right)
\left( \int                       \right)
\left( \int_0                     \right)
\left( \int^1                     \right)
\left( \int_0^1                   \right) &= \biggl(\text{bigg}\biggr)\\
\left( \frac{\sqrt 2}{2}          \right)
\left( \sum_0                     \right)
\left( \sum^1                     \right)
\left( \sum_0^1                   \right)
\left( \frac{\frac1x}{\frac{1}{n}}\right) &= \Biggl(\text{Bigg}\Biggr)\\
\left( \intop_0                   \right)
\left( \intop^1                   \right)
\left( \intop_0^1                 \right)
 
System Message: WARNING/2 (/usr/local/src/docutils-git-svn/docutils/test/functional/input/data/math_experiments.txt , line 127)
TeX to MathML converter `pandoc` failed:
[WARNING] Could not convert TeX math '\begin{aligned}
  \left( 3                          \right)
  \left( f(x)                       \right) 
  \left( \bar x                     \right)
  \left( \overline x                \right)
  \left( n_i                        \right) &= () \\
  \left( \underline x               \right) &= \bigl(\text{big}\bigr)\\
  \left( 3^2                        \right)
  \left( \sqrt{3}                   \right)
  \left( \sqrt{3^2}                 \right)
  \left( \sum                       \right)
  \left( \bigotimes                 \right)
  \left( \prod                      \right) &= \Bigl(\text{Big}\Bigr)\\
  \left( \frac{3  }{2}              \right)
  \left( \frac{3^2}{2^4}            \right)
  \binom{3  }{2}
  \begin{pmatrix} a & b \\ c & d \end{pmatrix}
  \left( \frac{1}{\sqrt 2}          \right)
  \left( \int                       \right)
  \left( \int_0                     \right)
  \left( \int^1                     \right)
  \left( \int_0^1                   \right) &= \biggl(\text{bigg}\biggr)\\
  \left( \frac{\sqrt 2}{2}          \right)
  \left( \sum_0                     \right)
  \left( \sum^1                     \right)
  \left( \sum_0^1                   \right)
  \left( \frac{\frac1x}{\frac{1}{n}}\right) &= \Biggl(\text{Bigg}\Biggr)\\
  \left( \intop_0                   \right)
  \left( \intop^1                   \right)
  \left( \intop_0^1                 \right)\end{aligned}', rendering as TeX:
          \right) &= \Bigl(\text{Big}\Bigr
                     ^
  unexpected "\\"
  expecting "&", "\\\\", white space or "\\end"
 
And in text:
( ) () : ( 3 ) ( f ( x ) ) ( x ‾ ) ( x ¯ ) ( n i ) ( ∑ ) ( ∑ 0 ) ( ∏ ) \left(3                          \right)
\left( f(x)                       \right)
\left( \bar x                     \right)
\left( \overline x                \right)
\left( n_i                        \right)
\left( \sum                       \right)
\left( \sum_0                     \right)
\left( \prod                      \right) 
( big ) \bigl(\text{big}\bigr) : ( x _ ) ( 3 2 ) ( 3 2 ) ( a b c d ) ( ⨂ ) \left(\underline x               \right)
\left( 3^2                        \right)
\binom{3}{2}
\left(\begin{smallmatrix} a & b \\
c & d \end{smallmatrix}           \right)
\left( \bigotimes                 \right) 
\Bigl(\text{Big}\Bigr) : ( 3 ) ( 3 2 ) ( 3 2 ) ( 3 2 2 4 ) ( 2 2 ) ( ∫ ) ( ∫ 0 ) ( ∫ 1 ) ( ∫ 0 1 ) ( ∑ 1 ) ( ∑ 0 1 ) ( 1 x 1 n ) \left(\sqrt{3}                   \right)
\left( \sqrt{3^2}                 \right)
\left( \frac{3}{2}                \right)
\left( \frac{3^2}{2^4}            \right)
\left( \frac{\sqrt 2}{2}          \right)
\left( \int                       \right)
\left( \int_0                     \right)
\left( \int^1                     \right)
\left( \int_0^1                   \right)
\left( \sum^1                     \right)
\left( \sum_0^1                   \right)
\left( \frac{\frac1x}{\frac{1}{n}}\right) 
System Message: WARNING/2 (/usr/local/src/docutils-git-svn/docutils/test/functional/input/data/math_experiments.txt , line 177)
TeX to MathML converter `pandoc` failed:
[WARNING] Could not convert TeX math '\Bigl(\text{Big}\Bigr)', rendering as TeX:
  \Bigl(\text{Big}\Bigr)
       ^ 
  unexpected "("
  expecting "%", "\\label", "\\nonumber" or whitespace
 
 
Test \left , \right , and the  bigl/bigr, … size commands
with all extensible delimiters.
pairing:
( b ) ( b ) ( b ) [ b ] [ b ] [ b ] { b } { b } { b } ⟨ b ⟩ ⟨ b ⟩ ⟨ b ⟩ \left.(       b \right)       \ \bigl(       b \Bigr)       \ \biggl(       b \Biggr)
\quad
\left.[       b \right]       \ \bigl[       b \Bigr]       \ \biggl[       b \Biggr]
\quad
\left.\{      b \right\}      \ \bigl\{      b \Bigr\}      \ \biggl\{      b \Biggr\}
\quad
\left.\langle b \right\rangle \ \bigl\langle b \Bigr\rangle \ \biggl\langle b \Biggr\rangle  
⌈ b ⌉ ⌈ b ⌉ ⌈ b ⌉ ⌊ b ⌋ ⌊ b ⌋ ⌊ b ⌋ | b | | b | | b | ∥ b ∥ ∥ b ∥ ∥ b ∥ \left.\lceil  b \right\rceil  \ \bigl\lceil  b \Bigr\rceil  \ \biggl\lceil  b \Biggr\rceil
\quad
\left.\lfloor b \right\rfloor \ \bigl\lfloor b \Bigr\rfloor \ \biggl\lfloor b \Biggr\rfloor
\quad
\left.\lvert  b \right\rvert  \ \bigl\lvert  b \Bigr\rvert  \ \biggl\lvert  b \Biggr\rvert
\quad
\left.\lVert  b \right\rVert  \ \bigl\lVert  b \Bigr\rVert  \ \biggl\lVert  b \Biggr\rVert  
\left.\lgroup b \right\rgroup \ \bigl\lgroup b \Bigr\rgroup \ \biggl\lgroup b \Biggr\rgroup
\quad
\left.\lmoustache b \right\rmoustache \ \bigl\lmoustache b \Bigr\rmoustache \ \biggl\lmoustache b \Biggr\rmoustache
\quad
\left./           b \right\backslash  \ \bigl/           b \Bigr\backslash  \ \biggl/           b \Biggr\backslash
 
System Message: WARNING/2 (/usr/local/src/docutils-git-svn/docutils/test/functional/input/data/math_experiments.txt , line 199)
TeX to MathML converter `pandoc` failed:
[WARNING] Could not convert TeX math '\left.\lgroup b \right\rgroup \ \bigl\lgroup b \Bigr\rgroup \ \biggl\lgroup b \Biggr\rgroup
  \quad
  \left.\lmoustache b \right\rmoustache \ \bigl\lmoustache b \Bigr\rmoustache \ \biggl\lmoustache b \Biggr\rmoustache 
  \quad
  \left./           b \right\backslash  \ \bigl/           b \Bigr\backslash  \ \biggl/           b \Biggr\backslash', rendering as TeX:
  up b \right\rgroup \ \bigl\lgroup b \Big
                     ^
  unexpected "\\"
  expecting "%", "\\label", "\\nonumber" or whitespace
 
non-pairing:
| b | | b | | b | | b | | b | | b | ∥ b ∥ ∥ b ∥ ∥ b ∥ ‖ b ‖ ‖ b ‖ ‖ b ‖ \left.|          b \right|          \ \bigl|          b \Bigr|          \ \biggl|          b \Biggr|
\quad
\left.\vert      b \right\vert      \ \bigl\vert      b \Bigr\vert      \ \biggl\vert      b \Biggr\vert
\quad
\left.\|         b \right\|         \ \bigl\|         b \Bigr\|         \ \biggl\|         b \Biggr\|
\quad
\left.\Vert      b \right\Vert      \ \bigl\Vert      b \Bigr\Vert      \ \biggl\Vert      b \Biggr\Vert  
\left.\arrowvert b \right\arrowvert \ \bigl\arrowvert b \Bigr\arrowvert \ \biggl\arrowvert b \Biggr\arrowvert
\quad
\left.\Arrowvert b \right\Arrowvert \ \bigl\Arrowvert b \Bigr\Arrowvert \ \biggl\Arrowvert b \Biggr\Arrowvert
\quad
\left.\bracevert b \right\bracevert \ \bigl\bracevert b \Bigr\bracevert \ \biggl\bracevert b \Biggr\bracevert
 
System Message: WARNING/2 (/usr/local/src/docutils-git-svn/docutils/test/functional/input/data/math_experiments.txt , line 224)
TeX to MathML converter `pandoc` failed:
[WARNING] Could not convert TeX math '\left.\arrowvert b \right\arrowvert \ \bigl\arrowvert b \Bigr\arrowvert \ \biggl\arrowvert b \Biggr\arrowvert
  \quad
  \left.\Arrowvert b \right\Arrowvert \ \bigl\Arrowvert b \Bigr\Arrowvert \ \biggl\Arrowvert b \Biggr\Arrowvert 
  \quad
  \left.\bracevert b \right\bracevert \ \bigl\bracevert b \Bigr\bracevert \ \biggl\bracevert b \Biggr\bracevert', rendering as TeX:
  \left.\arrowvert b \right\arrowvert \ \b
                   ^
  unexpected "b"
  expecting "%", "\\label", "\\nonumber" or whitespace
 
Variable-sized operators:
Inline: \int\ \iint\ \iiint\ \iiiint\ \idotsint \oint\ \smallint\
\sum\ \prod\ \coprod\ \bigwedge\ \bigvee\ \bigcap\ \bigcup\ \biguplus\
\bigsqcup\ \bigodot\ \bigoplus\ \bigotimes  and Display:
System Message: WARNING/2 (/usr/local/src/docutils-git-svn/docutils/test/functional/input/data/math_experiments.txt , line 241)
TeX to MathML converter `pandoc` failed:
[WARNING] Could not convert TeX math '\int\ \iint\ \iiint\ \iiiint\ \idotsint \oint\ \smallint\
  \sum\ \prod\ \coprod\ \bigwedge\ \bigvee\ \bigcap\ \bigcup\ \biguplus\
  \bigsqcup\ \bigodot\ \bigoplus\ \bigotimes', rendering as TeX: 
  \iiiint\ \idotsint \oint\ \smallint\
                     ^
  unexpected "\\"
  expecting "%", "\\label", "\\nonumber" or whitespace
 
\int\ \iint\ \iiint\ \iiiint\ \idotsint\ \oint\ \smallint\
\sum\ \prod\ \coprod\ \bigwedge\ \bigvee\ \bigcap\ \bigcup\
\biguplus\ \bigsqcup\ \bigodot\ \bigoplus\ \bigotimes
 
System Message: WARNING/2 (/usr/local/src/docutils-git-svn/docutils/test/functional/input/data/math_experiments.txt , line 245)
TeX to MathML converter `pandoc` failed:
[WARNING] Could not convert TeX math '\int\ \iint\ \iiint\ \iiiint\ \idotsint\ \oint\ \smallint\
  \sum\ \prod\ \coprod\ \bigwedge\ \bigvee\ \bigcap\ \bigcup\
  \biguplus\ \bigsqcup\ \bigodot\ \bigoplus\ \bigotimes', rendering as TeX: 
   \iiiint\ \idotsint\ \oint\ \smallint\
                     ^
  unexpected "\\"
  expecting "%", "\\label", "\\nonumber" or whitespace
 
\int_1 f\ \intop_1 f\ \iint_1 f\ \smallint_1 f\ \sum_1\
\prod_1\ \bigwedge_1\ \bigcap_1\ \biguplus_1\ \bigodot_1\ \int^N\
\intop^N\ \iiiint^N\ \oint^N\ \smallint^N\ \sum^N\ \coprod^N\
\bigvee^N\ \bigcup^N\ \bigsqcup^N\ \bigotimes^N
 
System Message: WARNING/2 (/usr/local/src/docutils-git-svn/docutils/test/functional/input/data/math_experiments.txt , line 249)
TeX to MathML converter `pandoc` failed:
[WARNING] Could not convert TeX math '\int_1 f\ \intop_1 f\ \iint_1 f\ \smallint_1 f\ \sum_1\
  \prod_1\ \bigwedge_1\ \bigcap_1\ \biguplus_1\ \bigodot_1\ \int^N\
  \intop^N\ \iiiint^N\ \oint^N\ \smallint^N\ \sum^N\ \coprod^N\ 
  \bigvee^N\ \bigcup^N\ \bigsqcup^N\ \bigotimes^N', rendering as TeX:
  \int_1 f\ \intop_1 f\ \iint_1 f\ \smalli
                  ^
  unexpected "_"
  expecting "%", "\\label", "\\nonumber" or whitespace
 
\int_1^N\ \intop_1^N\ \iint_1^N\ \iiint_1^N\ \iiiint_1^N\
\idotsint_1^N\ \oint_1^N\ \smallint_1^N\ \sum_1^N\ \prod_1^N\
\coprod_1^N\ \bigwedge_1^N\ \bigvee_1^N\ \bigcap_1^N\ \bigcup_1^N
\ \biguplus_1^N\ \bigsqcup_1^N\ \bigodot_1^N\ \bigoplus_1^N\
\bigotimes_1^N
 
System Message: WARNING/2 (/usr/local/src/docutils-git-svn/docutils/test/functional/input/data/math_experiments.txt , line 254)
TeX to MathML converter `pandoc` failed:
[WARNING] Could not convert TeX math '\int_1^N\ \intop_1^N\ \iint_1^N\ \iiint_1^N\ \iiiint_1^N\
  \idotsint_1^N\ \oint_1^N\ \smallint_1^N\ \sum_1^N\ \prod_1^N\
  \coprod_1^N\ \bigwedge_1^N\ \bigvee_1^N\ \bigcap_1^N\ \bigcup_1^N 
  \ \biguplus_1^N\ \bigsqcup_1^N\ \bigodot_1^N\ \bigoplus_1^N\
  \bigotimes_1^N', rendering as TeX:
  \int_1^N\ \intop_1^N\ \iint_1^N\ \iiint_
                  ^
  unexpected "_"
  expecting "%", "\\label", "\\nonumber" or whitespace
 
 
Text 
The text may contain non-ASCII characters: n Stoß n_\text{Stoß} 
Some text-mode LaTeX commands are supported with math_output  "html".
In other output formats, use literal Unicode: ç é è ë ê ñ ů ž © \text{ç é è ë ê ñ ů ž ©} \text{\c{c} \'e \`e \"e \^e \~n \r{u} \v{z} \textcircled{c}} .
System Message: WARNING/2 (/usr/local/src/docutils-git-svn/docutils/test/functional/input/data/math_experiments.txt , line 266)
TeX to MathML converter `pandoc` failed:
[WARNING] Could not convert TeX math '\text{\c{c} \'e \`e \"e \^e \~n \r{u} \v{z} \textcircled{c}}', rendering as TeX:
  'e \`e \"e \^e \~n \r{u} \v{z} \textcirc
                     ^ 
  unexpected "\\"
  expecting text, "}", "{", "$", "$$", "\\(" or "\\["