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<div>Hello Dan,<br>
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<div>On 01/07/2020, at 4:56, "Daniel Drucker" <<a href="mailto:aa1856@wayne.edu">aa1856@wayne.edu</a>> wrote:<br>
<br>
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<div>Dear All,<br>
<br>
I am using TeXShop 4.44 on a mid-2011 iMac running Mac OS 10.13.6 (High Sierra).<br>
That’s the latest version of the Mac OS that’s compatible with my iMac. I also<br>
have a fairly new MacBook Pro, but I like using TeX on the iMac because it has<br>
a 27” screen.<br>
<br>
I run into problems when I try to use bold extended text italic in Plain TeX’s<br>
math mode. I’d appreciate any suggestions you might have in how to use bold<br>
extended text italic painlessly in math mode. <br>
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<div>Font handling in math mode is quite different to in text mode, due to differences in spacing, and the need to handle superscripts and subscripts properly.</div>
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<div>You need the concept of a math-family of fonts.</div>
<div>See The TeXBook for details, ...</div>
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<div> ... or stick to LaTeX and packages, </div>
<div>where this has already been fully worked out.</div>
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<div><br>
I’m attaching a short document that illustrates the behavior I’m seeing and the <br>
problems I’m having.<br>
<br>
Thanks,<br>
Dan Drucker<br>
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<div>Hope this helps.</div>
<div>Stay safe.</div>
<div><br>
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<div> Ross</div>
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*************************************************************************************<br>
<br>
\magnification\magstep2<br>
\nopagenumbers<br>
\font\bx=cmbxti10<br>
\def\ts{\thinspace}<br>
\def\bi{{\bx i}} \def\bj{{\bx j}} \def\bk{{\bx k}} <br>
\def\bv{{\bx v}} \def\bw{{\bx w}}<br>
\def\bvv{\hbox{\bx v}} \def\bww{\hbox{\bx w}}<br>
\def\bvvv{\hbox{\bx v\ts}} \def\bwww{\hbox{\bx w\ts}}<br>
<br>
{\bx This looks fine, but it's plain text, not math.}<br>
<br>
$3\bi + 5\bj$. Math mode has overridden bold italic here. Why?<br>
<br>
{\bx 3\bi\ $+$ 4\bj}. The numbers are also in bold italic.<br>
<br>
3\bi\ + 4\bj\ + 5\bk. This looks fine, but it's not in math mode.<br>
<br>
4\bv\ - 5\bw. The minus sign needs to be in math mode.<br>
<br>
4\bv\ $-$ 5\bw. Now the minus sign looks right.<br>
<br>
$4v-5w$. Here's the spacing in ordinary math mode without bold italic.<br>
<br>
$c$\bv\ $-d$\bw. Math mode doesn't fix the spacing after the minus sign.<br>
<br>
$c$\bv\ $-$ $d$\bw. This looks better, but the coding is awkward.<br>
<br>
$c\bvv+d\bww$. hboxes help, but the spacing isn't quite right.<br>
<br>
$c\bvvv+d\bwww$. Adding thinspaces still doesn't yield correct spacing.<br>
<br>
$c\bvv-d\bww$. Here's the same experiment, but with a minus sign.<br>
<br>
$c\bvvv-d\bwww$. Spacing is still a problem.<br>
<br>
\bye<br>
<br>
*************************************************************************************<br>
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