Augmented matrix is not produced correctly

[Paul Smith]

On Wed, May 6, 2020 at 4:50 PM Paul A. Rubin <parubin73 at gmail.com> 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:
>
> https://tex.stackexchange.com/questions/299221/adding-vertical-line-equal-sign-to-augmented-bmatrix-without-using-array
>
> What version of LyX are you using? I get the vertical line using LyX 2.3.4.2 on Linux Mint.

Thanks, Paul. I am using

LyX Version 2.3.4.2

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.

Paul