# Mysterious space added in matrix-like environments

Here are two screenshots taken from 3D rotation matrix with zero determinant and Simplify this expression for the relative condition number of $f(x,y) := [ x^y, x + y ]^T$. It can be seen that an extra space is added between the left bracket and the matrix body. I have also tested some other matrix-like environments such as pmatrix and vmatrix, and there is always such a space added next to the left delimiter.

Is this due to some updates of MathJax or my browser? I am using Internet Explorer 11. Thanks.

Edit: This anomaly occurs when the renderer is HTML-CSS but disappears when the renderer is common HTML, preview HTML or SVG. The versions of related scripts are:

MathJax.js v2.7.5
TeX Input Jax v2.7.5 HTML-CSS Output Jax v2.7.5 PreviewHTML Output Jax v2.7.5 mml Element Jax v2.7.5

• You should also say which MathJax renderer you are using (this is site-specific, and can be set separately on Math.SE and Meta Math.SE). Right-click on a MathJax rendered expression and using the Math Settings > Math Renderer submenu to report the current selection (or change it, to see if your results vary). – hardmath Mar 8 at 2:54
• I don't see that at home, I don't see it in my office. (Both are Chromium on Linux.) I think that IE11 is quite outdated. Try a different browser to find out. – Asaf Karagila Mar 8 at 12:03