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Which constructs in (La)TeX and (La)TeX packages have classification \mathinner?

The TeXbook mentions:

  • fractions
  • \left...\right constructions
  • \ldots, \cdots, \ddots

Which fractions - all? Do other frequently used packages (e.g. AMS-LaTeX) define other constructs (e.g. I'm assuming all types of triple dots in AMS-LaTeX)?

One might expect the following to generate \mathinner, but they don't:

  • \bigl...\bigr (and the larger-size analogues)
  • \lvert...\rvert
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There's no reason why \bigl...\bigr should be inner, nor \lvert...\rvert. –  egreg Jan 29 at 7:45
    
@egreg 1. You can think of them as an instantiation of \left...\right, which in effect reduces to one of the \σl...\σr-sizes. 2. A user might not know that \σl and \σr don't need to be paired. –  Lover of Structure Jan 29 at 7:58

1 Answer 1

amsmath defines \@cdots as \mathinner; this in turn is used for \cdots, \dotsi, \dotsb, \dotsmand \intdots.

\mathellipsis and \ddots are so defined in fontmath.ltx.

mathtools doesn't add anything obvious.

i don't claim this list is complete.

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