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############          The TeX Gyre Collection of Fonts         ############
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Font: TeX Gyre Bonum Math
Authors: Bogus\l{}aw Jackowski, Piotr Strzelczyk and Piotr Pianowski
Version: 1.005
Date: 5 IX 2014 / 19 V 2016 (documentation update)

License:
  % Copyright 2014 for the TeX Gyre math extensions by B. Jackowski,
  % P. Strzelczyk and P. Pianowski (on behalf of TeX Users Groups).
  %
  % This work can be freely used and distributed under
  % the GUST Font License (GFL -- see GUST-FONT-LICENSE.txt)
  % which is actually an instance of the LaTeX Project Public License
  % (LPPL -- see http://www.latex-project.org/lppl.txt).
  %
  % This work has the maintenance status "maintained". The Current Maintainer
  % of this work is Bogus\l{}aw Jackowski, Piotr Strzelczyk and Piotr Pianowski.
  %
  % This work consists of the files listed
  % in the MANIFEST-TeX-Gyre-Bonum.txt file.
 
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############          A BRIEF DESCRIPTION OF THE FONT          ############
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TeX Gyre Bonum Math is a math companion for the TeX Gyre Bonum family
of fonts (see http://www.gust.org.pl/projects/e-foundry/tex-gyre/) in
the OpenType format.

The math OTF fonts should contain a special table, MATH, described in the 
confidential Microsoft document "The MATH table and OpenType Features 
for Math Processing". Moreover, they should contain a broad collection
of special characters (see "Draft Unicode Technical Report #25.
UNICODE SUPPORT FOR MATHEMATICS" by Barbara Beeton, Asmus Freytag,
and Murray Sargent III). In particular, math OTF scripts are expected
to contain the following scripts: a basic serif script (regular, bold, 
italic and bold italic), a calligraphic script (regular and bold), 
a double-struck script, a fraktur script (regular and bold), a sans-serif 
script (regular, bold, oblique and bold oblique), and a monospaced script.

The basic script is, obviously, TeX Gyre Bonum. The Greek
symbols in TeX Gyre Bonum were excerpted from the Kerkis
package (http://iris.math.aegean.gr/kerkis/) with the kind
permission of the authors, Apostolos Syropoulos and Antonis
Tsolomitis; in TeX Gyre Bonum Math, a few adjustments in the
Greek alphabet  were needed (such as adding four variants
of kappa1: u03F0 -- regular, u1D6DE -- bold, u1D718 -- italic,
u1D752 -- bold italic).

The calligraphic script were created from scratch as well as the math extension,
i.e., the main component of the font.

Other scripts, however, are borrowed from other fonts (the current
selection, however, may be subject to change):

  * The fraktur alphabets (regular and bold) is excerpted
    from the Leipziger Fraktur replica by Peter Wiegel
    ( http://www.peter-wiegel.de/Leipzig.html )
    with the kind permission of the author.

  * The sans serif alphabets (regular, oblique, bold, and
    bold oblique) are excerpted from TeX Gyre Heros
    http://www.gust.org.pl/projects/e-foundry/tex-gyre/heros
    (actually, the sans serif bold Greek symbols were manually tuned).

  * The double struck script is excerpted from TeX Gyre Termes Math;
    in the future, we plan to replace it with the script having forms
    derived from TeX Gyre Bonum alphabet.

  * Finally, the monospaced alphabet is taken from TeX Gyre Cursor
    (see http://www.gust.org.pl/projects/e-foundry/tex-gyre/).

Note that the members of all the mentioned alphabets, except
the main roman alphabet, should be considered symbols, not letters;
symbols are not expected to occur in a text stream; instead,
they are expected to appear lonely, perhaps with some embellishments
like subscripts, superscripts, primes, dots above and below, etc.

To produce the font, MetaType1 and the FontForge library were used:
the Type1 PostScript font containing all relevant characters was
generated with the MetaType1 engine, and the result was converted
into the OTF format with all the necessary data structures by
a Python script employing the FontForge library.

Recent changes (ver. 1.002 --> ver. 1.005) comprised mainly
interline settings in OTF tables (HHEA and OS/2).

                   *    *    *

The TeX Gyre Math Project was launched and is supported by
TeX USERS GROUPS (CS TUG, DANTE eV, GUST, NTG, TUG India, TUG, UK TUG).
Hearty thanks to the representatives of these groups and also
to all people who helped with their work, comments, ideas,
remarks, bug reports, objections, hints, consolations, etc.

