<html><head></head><body><div style="font-family: Verdana;font-size: 12.0px;"><div>> You do need the braces around \A.</div>
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<div>Or you can put the braces in the macro definition:</div>
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<div>\def\A{{\hbox{{\gfss\char'022}}}}<br/>
$\delta_\A$</div>
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<div style="margin:0 0 10px 0;"><b>Gesendet:</b> Sonntag, 27. August 2023 um 04:37 Uhr<br/>
<b>Von:</b> Laurence.Finston@gmx.net<br/>
<b>An:</b> "Gérald Tenenbaum" <gerald.tenenbaum@univ-lorraine.fr><br/>
<b>Cc:</b> "Eplain" <tex-eplain@tug.org><br/>
<b>Betreff:</b> Aw: Re: [tex-eplain] boldface greek symbols</div>
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<div>If you're just using it occasionally, there's no need to define a family for it. For example, this works:</div>
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<div>\font\gf=cmmib10</div>
<div>$\hbox{{\gf\char'022}}\neq\vartheta$</div>
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<div>If you want it in subscripts, you could do something like this:</div>
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<div>\font\gfss=cmmib10 scaled 600</div>
<div>$\omega_{\hbox{{\gfss\char'022}}}$</div>
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<div>This works, too:</div>
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<div>\def\A{\hbox{{\gfss\char'022}}}</div>
<div>$\delta_{\A}$<br/>
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<div>You do need the braces around \A.</div>
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<div>Laurence Finston</div>
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<div style="margin: 0 0 10.0px 0;"><b>Gesendet:</b> Sonntag, 27. August 2023 um 00:47 Uhr<br/>
<b>Von:</b> "Gérald Tenenbaum" <gerald.tenenbaum@univ-lorraine.fr><br/>
<b>An:</b> "Karl Berry" <karl@freefriends.org><br/>
<b>Cc:</b> "Eplain" <tex-eplain@tug.org><br/>
<b>Betreff:</b> Re: [tex-eplain] boldface greek symbols</div>
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<div style="font-size: 12.0px;font-family: Lucida Sans;">Hi Karl,<br/>
<br/>
Thanks.<br/>
This is what I use, but I find strange to have to define, for instance
<div style="margin-left: 40.0px;">\font\tengp=cmmib10<br/>
\newfam\gpfam<br/>
\textfont\gpfam=\tengp<br/>
\def\gp{\fam\gpfam\textfont1=\tengp}<br/>
\def\gth{\hbox{$\gp\vartheta$}}<br/>
$\gth\neq\vartheta$<br/>
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Isn't there a simpler way to invoke cmmib10?<br/>
Regards,<br/>
<br/>
Gérald<br/>
<br/>
<span>Karl Berry a écrit le 27/8/23 à 00:31 :</span>
<blockquote>
<pre> Is there a simple way to make boldface greek letters with eplain?
Hi G\'erald - Eplain doesn't try to do anything with fonts.
For math, there are bold Greek letters in the cmmib10 font. There are
probably plain TeX font packages that do the setup? I admit I don't have
anything specific to suggest, though. Sorry ... -k
</pre>
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