Augmented matrix is not produced correctly

Paul Smith phhs80 at
Wed May 6 15:59:20 UTC 2020

On Wed, May 6, 2020 at 4:50 PM Paul A. Rubin <parubin73 at> wrote:
> I suspect that I have found a bug: When I do what I do at the attached
> screenshot, I do not get what one would have expected (the vertical
> line drawn between the first and the second column).
> This discussion may be relevant:
> What version of LyX are you using? I get the vertical line using LyX on Linux Mint.

Thanks, Paul. I am using

LyX Version

on Fedora Linux 31.

Have you selected the matrix decoration as [x], Paul?

As soon as one does that, LyX uses bmatrix environment, with which it
is impossible to get an augmented matrix.


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