mhequ – Multicolumn equations, tags, labels, sub-numbering

The mhequ style file simplifies creating multi-column equation environments and tagging equations therein. It supports sub-numbering of blocks of equations (like (1.2a), (1.2b), etc) and references to each equation individually (1.2a) or to the whole block (1.2). The labels can be shown in draft mode. The default behaviour is to show an equation number if and only if the equation actually has a label, which reduces visual clutter.

Comments in the package itself describe its usage, which should also be self-evident from the provided example file.

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