PostScript versions of the ESSTIX, with macro support
These fonts represent translation to PostScript Type 1 of the ESSTIX fonts. ESSTIX seem to have been a precursor to the STIX project, and were donated by Elsevier to that project. The accompanying virtual fonts with customized metrics and LaTeX support files allow their use as calligraphic, fraktur and double-struck (blackboard bold) in maths mode.
You can contact the maintainers of this package via email at
texlive dash maintainers at fedoraproject dot org.