**From:** Hans Aberg (*haberg@math.su.se*)

**Date:** Sat May 14 2005 - 07:36:48 CDT

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The Greek letters, relative the Latin ones, in the Mathematical

Alphanumeric Symbols, seem incomplete. The Latin letters exist in the

following forms:

<none>

MATHEMATICAL BOLD

MATHEMATICAL ITALIC

MATHEMATICAL BOLD ITALIC

MATHEMATICAL SANS-SERIF

MATHEMATICAL SANS-SERIF BOLD

MATHEMATICAL SANS-SERIF ITALIC

MATHEMATICAL SANS-SERIF BOLD ITALIC

whereas the Greek letters only have

<none>

MATHEMATICAL BOLD

MATHEMATICAL ITALIC

MATHEMATICAL BOLD ITALIC

MATHEMATICAL SANS-SERIF BOLD

MATHEMATICAL SANS-SERIF BOLD ITALIC

apparently missing the forms:

MATHEMATICAL SANS-SERIF

MATHEMATICAL SANS-SERIF ITALIC

I should say that in traditional math, I think that that only the

following forms are necessary:

<none>

MATHEMATICAL BOLD

MATHEMATICAL ITALIC

MATHEMATICAL BOLD ITALIC

all traditionally typeset having serifs. One possible pure math usage

might be that non-ITALIC (i.e., not slanted) forms are used for

constants, ITALIC forms for variables; BOLD forms to indicate

multi-component forms (such as vectors), as opposed to the non-bold

single component objects. There is no point to discuss the very

varied actual math usage here, which depends on tradition which in

its turn depends on pats availability of glyphs, and different

communities, such as engineers, would do it differently, different

groups having incompatible practises.

But it means that all forms needed in math already are present, but

the Latin letters got some extra forms that are seemingly absent in

the Greek forms.

-- Hans Aberg

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