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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

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

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

Example

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

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

Labels

Upper

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

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

Lower

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

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

Left