Author: F. Bosisio
CTAN location: macros/latex/contrib/bosisio
This package provides the font ``\DblFont'' (font msbm10), which corresponds to the so called blackdoard-bold symbols.
For each uppercase letter ``X'' a corresponding ``X''
and ``XX'' options exist: they declare the commands
``\X'' and ``\XX'' respectively, which both generate
the letter X in DblFont.
If a command named ``\X'' or ``\XX'' already exists in LaTeX, its definition is first saved in ``\BackDoubleX'' or ``\BackDoubleXX'' respectively.
Also a ``RT'' option exists: it declares the ``\RT'' command, which generates the two letters RT in DblFont (useful for the Raviart-Thomas spaces).