[tex-eplain] boldface greek symbols

[Gérald Tenenbaum]

So how would it work with bold greek?
When I tried this I get an error until I insert \hboxes

Laurence.Finston at gmx.net a écrit le 27/8/23 à 12:12 :
> > Can't one design a setting working like \bf or \it ?
> Sure.  This is how \bf is defined in plain.tex:
> \newfam\bffam \def\bf{\fam\bffam\tenbf} % \bf is family 6
> \textfont\bffam=\tenbf \scriptfont\bffam=\sevenbf
> \scriptscriptfont\bffam=\fivebf
> *Gesendet:* Sonntag, 27. August 2023 um 11:41 Uhr
> *Von:* "Gérald Tenenbaum" <gerald.tenenbaum at univ-lorraine.fr>
> *An:* "Philip Taylor (Hellenic Institute)" 
> <P.Taylor at Hellenic-Institute.Uk>
> *Cc:* "Eplain" <tex-eplain at tug.org>
> *Betreff:* Re: [tex-eplain] boldface greek symbols
> Thanks.
> Yes it suffices, but I also need these boldface letters in subscripts.
> I am puzzled by the necessity of using \hbox. Can't one design a 
> setting working like \bf or \it ?
> Regards,
>
> Gérald
>
> Philip Taylor (Hellenic Institute) a écrit le 27/8/23 à 11:21 :
>
>     You don't appear to be using \gpfam, Gérald — will not the
>     following suffice ?
>
>
>     \font \tengp = cmmib10
>     \def \gp {\textfont 1 = \tengp}
>     \def \gth {\hbox {$\gp \vartheta $}}
>     $\gth \neq \vartheta $
>     \end
>
>     --
>     /Philip Taylor/
>

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