Template:Extra Maths

[math]\newcommand{\bigudot}{ \mathchoice{\mathop{\bigcup\mkern-15mu\cdot\mkern8mu}}{\mathop{\bigcup\mkern-13mu\cdot\mkern5mu}}{\mathop{\bigcup\mkern-13mu\cdot\mkern5mu}}{\mathop{\bigcup\mkern-13mu\cdot\mkern5mu}} }[/math][math]\newcommand{\udot}{\cup\mkern-12.5mu\cdot\mkern6.25mu\!}[/math][math]\require{AMScd}\newcommand{\d}[1][]{\mathrm{d}^{#1} }[/math] This adds \udot and \bigudot commands.

They look like:

• [ilmath]\cup^a_b[/ilmath]
• [ilmath]\udot^a_b[/ilmath], [math]\udot^a_b[/math] for \udot and
• [ilmath]\bigudot^a_b[/ilmath], [math]\bigudot^a_b[/math] for \bigudot

And

• [ilmath]A\cup B\cup B[/ilmath]
• [ilmath]A\udot B\udot B[/ilmath], [math]A\udot B\udot B[/math]
• [ilmath]A\bigudot B[/ilmath], [math]A\bigudot B[/math]

Note: [ilmath]\udot[/ilmath] appears not-centered due to sub-pixel problems on desktop/low-DPI displays. I can't see a fix for this