Missing environments

[tmke8]

If something is missing from this list, open a new issue. I will then link it here.

• \begin{array} – Supporting \begin{array}{...} #438
• \begin{subarray} – \begin{subarray} is not implemented #70
• \begin{smallmatrix} – like matrix but with scriptlevel=1 set; actually, the spacing should also be reduced (or is that only a problem in Firefox?)
• \begin{equation}/\begin{equation*} — error on &; \\ ignored
• \begin{gather}/\begin{gather*}/\begin{gathered} – like aligned but without any aligning functionality; always centered (also, no column functionality; error thrown when there is an &)
• \begin{split} – in contrast to \begin{aligned}, \begin{split} deeply integrates with the parent \begin{align}: it reuses the columns of the parent and it respects tbtags; \begin{split} essentially acts as if you used \nonumber on all but one row (but not quite because if you don't have tbtags set and have an even number of rows then the equation number will appear between two rows)
• \begin{aligned}[t] and \begin{aligned}[b] — the optional parameter controls how the block is aligned to the surrounding content
• \begin{alignat}/\begin{alignat*}/\begin{alignedat} – so, the first difference to align is that you have to specify the number of rl column-pairs that you want to have (however, this is only for error reporting and can be turned off with the special value "-1"); the other difference is that there is never any spacing between the columns; see also Supporting more equation environments #456
• \begin{multline}/\begin{multline*}/\begin{multlined} (this last one only in mathtools) – there are no columns here; the first row is left-aligned, the last row is right-aligned, and any rows in between are center-aligned; this also needs something like style="width:100%", otherwise it is pointless; see also Supporting more equation environments #456
• \begin{rcases} – from mathtools; it's cases but the curly brace is on the right side of the table
• \begin{darray} – like array but with display style
• \begin{dcases} – like cases but with display style
• \begin{drcases} – like rcases but with display style
• \begin{CD} – commutative diagrams from category theory