'mathml'-option messes up the matrix width

[yalguzaq]

Consider the following equation in the minimal LaTeX settings: $$\tilde{\mathbf{x}} := \begin{bmatrix} \dfrac{1}{nU}\mathbf{x}\\[7.5pt] \displaystyle 1 - \dfrac{1}{nU}\sum_{i=1}^{n}x_i\end{bmatrix} \in \mathfrak{R}^{n+1}.$$ compiling it with make4ht file.tex produces the desired output whereas compiling it with make4ht file.tex 'mathml,mathjax' messes up the matrix

[michal-h21]

Thanks for the report. It is caused by <mtd> elements inside <mtr class="array-vspace">. It seems that this <mtr> shouldn't contain any children. I've fixed it in TeX4ht sources, so it should be available in TeX Live soon.