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On 6/29/2020 1:06 PM, Taco Hoekwater wrote:
Sorry, that was a bit too much oversimplification:
On 29 Jun 2020, at 12:36, Taco Hoekwater
wrote: In math mode, there *is* an expression state maintained, and that is why \over and \atop work.
Actually (still oversimplifying), the found commands are saved in a temporary list, that is then reprocessed once math mode has ended. And at that stage, an expression tree is built up. another way to look at it is to think of each {...} being a subformula, so
{1} \over {2} are two subformulas combined into one larger subformula Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl -----------------------------------------------------------------