Erewhon-Math package
====================

## Description

`Erewhon-Math.otf’ is an Utopia based OpenType mathematical font.
The mathematical symbols are borrowed or derived from Michel Bovani’s
Fourier-GUTenberg package, Latin letters and digits are borrowed from
Michael Shape’s Erewhon font.

## Contents

* Erewhon-Math.otf      OpenType Math font
* Erewhon-Math-Bold.otf Bold variant
* fourier-otf.sty       LaTeX style file: replaces fourier.sty for LuaTeX/XeTeX
* Erewhon-Math.pdf      Documentation in PDF format
* Erewhon-Math.ltx      Source of Erewhon-Math.pdf
* unimath-erewhon.pdf   Modified version of unimath-symbols.pdf
                        showing available Erewhon-Math symbols compared to
                        LatinModern, STIXTwo, Erewhon, TeXGyrePagella,
                        Libertinus and EBGaramond.
* unimath-erewhon.ltx  Source of unimath-symbols.pdf
* README.md            (this file)

## Installation

This package is meant to be installed automatically by TeXLive, MikTeX, etc.
Otherwise, Erewhon-Math can be installed under TEXMFHOME or TEXMFLOCAL, f.i.
Erewhon-Math.otf in directory  texmf-local/fonts/opentype/public/erewhon-math/
and fourier-otf.sty in directory  texmf-local/tex/latex/erewhon-math/.  
Documentation files and their sources can go to directory
texmf-local/doc/fonts/public/erewhon-math/

Don't forget to rebuild the file database (mktexlsr or so) if you install
under TEXMFLOCAL.

Finally, make the system font database aware of the Erewhon Math font
(fontconfig under Linux).

## License

* The font `Erewhon-Math.otf’ is licensed under the SIL Open Font License,
Version 1.1. This license is available with a FAQ at:
http://scripts.sil.org/OFL
* The other files are distributed under the terms of the LaTeX Project
Public License from CTAN archives in directory macros/latex/base/lppl.txt.
Either version 1.3 or, at your option, any later version.

## Changes

* First public version: 0.40
* v0.41:
     - Added chars U+2AB1 to U+2AB4 (\precneq, \succneq, \preceqq, \succeqq).
     - Fixed kerning between Italic/BoldItalic Latin and Greek letters
       and their subscript.
* v0.42:
     - Added thirty symbols U+00B0 (degree), U+01B5, U+214B, U+2232, U+2233,
     arrows U+2933 to U+2937 and some more.
     - Improved kerning between roots and degrees.
     - Improved kerning between arrows accents and parenthesis.
     - Accents position above italic dans bold italic latin
     and greek letters tuned.
* v0.43
     - Corrected "IsExtended" flags.
     - Improved kernings for differential elements.
     - Changed \hbar, which now behaves as intended by unicode-math package.
     - Glyph \Game (U+2141) corrected (it was upside down).
* v0.44
     - Improved sub- and superscripts: glyphs redesigned bolder,
     size reduced (70%, 55%) instead of (76%, 60%).
     - Fixed right kernings of "italic f".
     - Fixed right bearings and italic corrections of mathscr capitals.
* v0.45
     - Added stretchy accents \wideoverbar, \widebreve, \widecheck.
* v0.46
     - Extensible \langle, \rangle, \lAngle and \rangle delimiters
     are now available in eight sizes (three bigger sizes added).
     - Sub- and superscripts reshaped: boldness slightly reduced.
* v0.47
     - Added \mdsmwhtsquare (U+25FD), \mdsmblksquare (U+25FE),
     \lgwhtsquare (U+02B1B), \lgblksquare U+02B1C).
     - Tuned all "squares", "circles" and "triangles": the smaller ones
     are centered on the math-axis, larger ones rest on the baseline.
     - Redesigned symbols \angle, \measuredangle, \sphericalangle
     (U+2220 to U+2222).
     - Redesigned lowercase script letters \mscre, \mscrg, \mscro
     (U+212F, U+210A, U+2134).
     - Added symbols \inttop, \intbottom, \sumtop, \sumbottom
     (U+2320, U+2321, U+23B2, U+23B3).
     - Added  symbols \hrectangleblack (U+025AC), \hrectangle (U+025AD),
     \mdlgwhtlozenge (U+25CA) \mdlgblklozenge (U+29EB).
     - Added symbols \enclosedcircle, \enclosedsquare, \encloseddiamond,
     \enclosedtriangle (U+20DD, U+20DE, U+20DF, U+20E4).
     - Added symbols \lozengeminus, \concavediamond, \concavediamondticketleft,
     \concavediamondticketright (U+27E0 to U+27E3).
     - Added symbols \mdblkdiamond, \mdwhtdiamond, \mdblklozenge,
     \mdwhtlozenge, \smblkdiamond, \smblklozenge, \smwhtlozenge
     (U+2B25 to U+2B2B).
     - Added two options (no-text, Scale=) to fourier-otf.sty.
* v0.50
     - Changes in Erewhon-Math:
       * Added upright versions of integrals (StylisticSet=3 feature).
       * All bold Math Script uppercase characters redesigned (their
         look was not consistent with their normal weight counterparts).
       * Added variants for mscrE, mscrQ and mscrT and their bold
         counterparts accessible through cv20, cv21 and cv22 respectively.
       * Added U+0338 for negation of "\mathrel" chars.
     - Changes in FourierOrns:
       * \texpertenthousand now defined in Erewhon (v.1.118).
       * \eurologo now borrowed from Erewhon (v.1.118).
       * Files FourierOrns-Bold.otf, FourierOrns-Italic.otf and
         FourierOrns-BoldItalic.otf (useless now) deleted.
       * Breaking change: ornaments \leafleft and \leafright
         swapped in order to match the orignal type1 version.
* v0.51
     - Feature +onum added (oldstyle numerals in maths).
	   Option fulloldstyle added to fourier-otf.sty, this option was
	   available with the original fourier-GUTenberg package.
	 - Sub- and superscript placement corrected for bold calligraphic capitals.
     - Metrics changed for sans-serif and typewriter glyphs.
* v0.52
     - Over/underbrace: metrics of horizontal variants tuned.
	 - Added glyphs \nleqqslant and \ngeqqslant (U+E09A, U+E09B).
	 - Fixed "Style=" options in fourier-otf.sty (they didn't work for XeLaTeX).
* v0.53
     - fourier-otf.sty now loads realscripts for better superscripts.
     - Vertical variants of \mathslash, \backslash: slope corrected.
     - Added proportional digits and lnum, pnum features in math mode.
	 - Added character variant (cv11) for \partial.
* v0.54
	 - Delimiters' sizes `()’, `[]’ and `{}’ now match those of the
       Erewhon text fonts.  Bacward compatibility option (+ss09) added.
     - Slight correction to degree position on radicals.
	 - Experimental Bold variant added.
	 - Glyph Bbbsum.v1 (displaystyle) added.
	 - Metrics of some italic capitals (H,M,N,U) corrected.
* v0.55
	 - Fixed vertical variants of \Vert and \Vvert.
	 - Added extensible integral for U+222B (usable with luametatex).
* v0.56
	 - Package now compatible with mathtools’ extensible arrows.
	 - \diagup and \diagdown moved from private area to U+27CB, U+27CD.
  
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Copyright 2019-2023  Michel Bovani, Daniel Flipo  
E-mail: michel (dot) bovani (at) icloud (dot) com  
        daniel (dot) flipo (at) free (dot) fr
