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• Trigger "/mathb"

\begin{CD}
...code here...
\end{CD}

Commutative Diagram Arrows

• @<<< left arrow

• @AAA up arrow

• @VVV down arrow

• @. empty arrow

• @>>> right arrow

• @= horizontal equals

• @| vertical equals

View all arrows

\begin{CD}
     @>>> @<<< @AAA @VVV @= @| @.
\end{CD}

Diagram Example

\begin{CD}
1 @<<< 2 @= 3\\
@. @| @VVV\\
@. 4 @= 5
\end{CD}

Labels

Upper

\begin{CD}
\text{A} @>label>> \text{B}
\end{CD}

Lower

\begin{CD}
\text{A} @>>label> \text{B}
\end{CD}

Left

\begin{CD}
\text{A}
\\@VlabelVV\\
\text{B}
\end{CD}

Right

\begin{CD}
\text{A}
\\@VVlabelV\\
\text{B}
\end{CD}

Long Label Alignment

If one arrow has a long label and an arrow parallel to it has no label, the parallel label will be shorter. The following code should be added to fix this:

• @>{\phantom{\text{this text should match the parallel arrow label}}}>>

Before

\begin{CD}
1 @>>> 2
@>\text{this is a really long label}>> 3\\
@VVV @VVV @VVV\\
4 @>>> 5@>>> 6
\end{CD}

After

\begin{CD}
1 @>>> 2
@>\text{this is a really long label}>> 3\\
@VVV @VVV @VVV\\
4 @>>> 5 @>{\phantom{\text{this is a really long label}}}>> 6
\end{CD}

Long Label Alignment + Label

If you want to add a label to the phantom arrow, Incorporate the following rlap structure to the phantom command:

• {\\rlap{$\\scriptstyle{\\text{The Label}}$}\\phantom{\\text{this text should match the parallel arrow label}}}

\begin{CD}
1 @>>> 2
@>\text{this is a really long label}>> 3\\
@VVV @VVV @VVV\\
4 @>>> 5 @>{\rlap{$\scriptstyle{\text{shorter}}$}\phantom{\text{this is a really long label}}}>> 6
\end{CD}

Note Relationship Diagram

\begin{CD}
\text{High-Tier}
@>\text{next entry}>> 
\text{Parent}
@>\text{next entry}>>
\text{Orphan} \\ 
@VrelatedVV 
@VrelatedVV \\
\text{Connector} 
@>\text{next entry}>> 
\text{Child}\\ 
@VrelatedVV \\
\text{Child}\\
\end{CD}

Array Diagram Arrows

You can use array commands to create diagrams too. Here is a list of LaTeX arrows you can choose from.

Array Diagram Example

\begin{array}{ccccc}
&& \text{High-Tier} && \\
& \swarrow & \downarrow & \searrow & \\
\text{Connector} && \text{Child} && \text{Connector} \\
\downarrow &&&& \downarrow \\
\text{Child} &&&& \text{Child}
\end{array}

View examples inside Notion

Further Reading