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This is a cheat sheet on which code / markdown notation leads to which MathJax output.  
This is a cheat sheet on which code / markdown notation leads to which MathJax output.  


MathJax is an open-source JavaScript display engine for LaTeX, MathML, and AsciiMath notation that works in all modern browsers.
[https://www.mathjax.org/ MathJax] is an open-source JavaScript display engine for LaTeX, MathML, and AsciiMath notation that works in all modern browsers.


== MathJax in Obsidian.md ==
When using MathJax inside Obsidian.md the markdown code representing the MathJax formula needs start and end with the dollar sign, i.e.: <code>$a_1..a_n$</code>
When using MathJax inside Obsidian.md the markdown code representing the MathJax formula needs start and end with the dollar sign, i.e.: <code>$a_1..a_n$</code>
In order to show fractions a little bit bigger and centered use two dollar signs, i.e.: <code><nowiki>$$a = \frac{\sqrt{b^2 + c^2}}{2}$$</nowiki></code>
Printing little bigger works too with <code>$\displaystyle$</code> ahead of the fraction


== Cheatsheet ==
== Cheatsheet ==
=== Formatting ===
{| class="wikitable" style="background-color:#ffffff;"
{| class="wikitable" style="background-color:#ffffff;"
!Description
!Description
!Example
!Example
!LaTeX Code / Markdown
!LaTeX Code / Markdown
|-
|Fractions
|<math>\frac{km}{h}</math>
|<code>\frac{km}{h}</code>
|-
|Text with spaces
|<math>\text{kilometers or miles}</math>
|<code>\text{kilometers or miles}</code>
|-
|Superscript / Exponent
|<math>a^2 + b^2 = c^2</math>
|<code>a^2 + b^2 = c^2</code>
|-
|-
|Subscript
|Subscript
Zeile 18: Zeile 37:
|<math>r_{0_1} + r_{0_2} + ... + r_{0_n}</math>
|<math>r_{0_1} + r_{0_2} + ... + r_{0_n}</math>
|<code>{r_{0_1}​​ + r_{0_2} ​+ ... + r_{0_n}</code>
|<code>{r_{0_1}​​ + r_{0_2} ​+ ... + r_{0_n}</code>
|}
=== Symbols ===
{| class="wikitable" style="background-color:#ffffff;"
!Description
!Example
!LaTeX Code / Markdown
|-
|-
|Superscript / Exponent
|Infinity
|<math>a^2 + b^2 = c^2</math>
|<math>\infty</math>
|<code>a^2 + b^2 = c^2</code>
|<code>\infty</code>
|-
|-
|Overline one character
|Overline one character
Zeile 30: Zeile 56:
|<math>\overline {AB}</math>
|<math>\overline {AB}</math>
|<code>\overline {AB}</code>
|<code>\overline {AB}</code>
|-
|Hat over one character
|<math>\hat a</math>
|<code>\hat a</code>
|-
|Hat over two characters
|<math>\widehat {ab}</math>
|<code>\widehat {ab}</code>
|-
|Sum of a set
|<math>\sum_{i=1}^n a_i</math>
|<code>\sum_{i=1}^n a_i</code>
|-
|Sum of a set (larger)
|<math>\displaystyle \sum_{i=1}^n a_i</math>
|<code>\displaystyle \sum_{i=1}^n a_i</code>
|}
=== Constants ===
{| class="wikitable" style="background-color:#ffffff;"
!Description
!Example
!LaTeX Code / Markdown
|-
|Pi
|<math>\pi</math>
|<code>\pi</code>
|-
|Euler's Number
|<math>\mathrm{e}</math>
|<code>\mathrm{e}</code>
|}
=== Matrices ===
{| class="wikitable" style="background-color:#ffffff;"
!Description
!Example
!LaTeX Code / Markdown
|-
|-
|Matrix with Parentheses
|Matrix with Parentheses
Zeile 36: Zeile 100:
1 & 0
1 & 0
\end{pmatrix}</math>
\end{pmatrix}</math>
|  
|
  \begin{pmatrix}
  \begin{pmatrix}
  0 & 1 \\  
  0 & 1 \\  
  1 & 0
  1 & 0
  \end{pmatrix}
  \end{pmatrix}
|-
|Matrix with Brackets
|<math>\begin{bmatrix}
0 & 1 \\
1 & 0
\end{bmatrix}</math>
|
\begin{bmatrix}
0 & 1 \\
1 & 0
\end{bmatrix}
|-
|-
|Complex Matrix with Parentheses
|Complex Matrix with Parentheses

Aktuelle Version vom 3. Juni 2025, 14:07 Uhr

This is a cheat sheet on which code / markdown notation leads to which MathJax output.

MathJax is an open-source JavaScript display engine for LaTeX, MathML, and AsciiMath notation that works in all modern browsers.

MathJax in Obsidian.md

When using MathJax inside Obsidian.md the markdown code representing the MathJax formula needs start and end with the dollar sign, i.e.: $a_1..a_n$

In order to show fractions a little bit bigger and centered use two dollar signs, i.e.: $$a = \frac{\sqrt{b^2 + c^2}}{2}$$

Printing little bigger works too with $\displaystyle$ ahead of the fraction

Cheatsheet

Formatting

Description Example LaTeX Code / Markdown
Fractions kmh \frac{km}{h}
Text with spaces kilometers or miles \text{kilometers or miles}
Superscript / Exponent a2+b2=c2 a^2 + b^2 = c^2
Subscript a1..an a_1..a_n
Double Subscript r01+r02+...+r0n {r_{0_1}​​ + r_{0_2} ​+ ... + r_{0_n}

Symbols

Description Example LaTeX Code / Markdown
Infinity ∞ \infty
Overline one character a‾ \overline a
Overline multiple characters AB‾ \overline {AB}
Hat over one character a^ \hat a
Hat over two characters ab^ \widehat {ab}
Sum of a set ∑i=1nai \sum_{i=1}^n a_i
Sum of a set (larger) ∑i=1nai \displaystyle \sum_{i=1}^n a_i

Constants

Description Example LaTeX Code / Markdown
Pi π \pi
Euler's Number e \mathrm{e}

Matrices

Description Example LaTeX Code / Markdown
Matrix with Parentheses (0110) 
\begin{pmatrix}
0 & 1 \\ 
1 & 0
\end{pmatrix}
Matrix with Brackets [0110] 
\begin{bmatrix}
0 & 1 \\ 
1 & 0
\end{bmatrix}
Complex Matrix with Parentheses (BobAliceBob01Alice10) 
\begin{pmatrix}
 & ​Bob & Alice \\
Bob & 0 & 1 \\
Alice & 1 & 0  
\end{pmatrix}


Sources

I found the following sources which helped me out:

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