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[Basile Audoly <address@hidden>]

Hi Kostas,

I don't think this particular command exists, but the definition of the 
equation environment in env-math.ts shows that the labelled equation is 
produced by <equation-lab | equation | label >. You can use the command 
<equation-lab | | > directly in your document and type whatever you like as a 
label—references to equations will work normally. Or you can redefine 
<equation> to call <equation-lab | | > but use a different macro than the 
default one (<the-equation>) to produce the label.

If you instead need to modify the _rule_ for producing the equation label, 
you can look into <the-equation>: it uses the macro <display-equation | > to 
format the counter <counter-equation>. This is where you would specify, e.g., 
that the label uses roman instead or arabic numbers.

Basile

> Le 18 sept. 2021 à 16:07, Kostas Oikonomou <address@hidden> a écrit :
> 
> Is there an analogue to amsmath's \tag{} construct in TeXmacs?  
> This is to label an equation with an arbitrary, non-numeric label, e.g. (*).
> 
>                                       Kostas