A post Mathematical formulation of beam: get stress/strain from forces and momentum uses `\overline{\overline{…}}`

. The results below are mostly from Safari 16.1 on macOS 12.6.1, but casual experimentation suggests that, with one exception, they are not terribly browser-dependent.

Using HTML-CSS (Common HTML is almost identical):

Using Preview HTML:

Using SVG:

Using MathML on Safari:

Using MathML on Firefox 107.0.1:

The spacing of "MathML on Firefox" is the correct one (by comparing to a separate TeX installation). I am a bit surprised that the SVG spacing is incorrect, since I thought that just compiled it in an external process and just inserted an image of the resulting rendered equation.