How to add center-aligned columns in math mode?

Questions
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1

In math mode, & creates alternatively left-aligned and right-aligned columns. Is it possible to make a column centered?

2

Hello and welcome @jeanas, don’t hesitate to read How to post in the Questions category and change your topic’s title appropriately, and optionally add some tags.

As for center-aligning equations, you can do that using a grid instead, as pure equations only alternate alignment left and right.

eg

#grid(
    align: (center, center),
    row-gutter: 1em,
    column-gutter: .5em,
    columns: 2,
    $a + b$, $=1$,
    $d$, $=2$
)

image

3

Hey @jeanas, please let us know if @quachpas’s answer solved your problem (and, if so, mark it as a solution) or you’d like more help. Thank you!