>  > Frank Mittelbach introducing "inpmath":
 >  >  > \usepackage{inpmath}
 >  >  > \DeclareMathMeaning{\"}{\ddot}
 >  >
 >  > pleased to see that project which was already implemented...
 >  > at least in French Pro along with the "keyboard" package.
 >  > Since i did that for the "mltex" option, i really appreciate
 >  > to have it available without it too.
 >
 > glad to learn that; can you perhaps tell us how you resolved the problem of
 > either killing ligatures and kerns or alternatively making the wrong choice at
 > the begining of an \halign cell that afterwards (!) jumps into math mode?

there is no need to resolve a pb which does not exist: there is no
\ifmmode and there is no expansion since i use the "mltex" option and
thus inputed chars belong to category "letter".

 >  > Doing that, what about \c and \C? or \L and \o and such?
 >  > and \oe, \OE ? The pb is a little more complicated and
 >  > should often require a new definition of that macros.
 >
 > i'm at loss at what you are driving at here, can you explain?
 >
 > \DeclareMathMeaning{<LICR>}{<code>}
 >
 > defines a mapping for an object of LaTeX Internal Character Representation,
 > e.g. \L, to a math object. That math object needs to exist,

ok, so you have to change the original title "Providing math support
for inputenc" IMHO. I'm afraid that if text chars can't be all used in math
it will be of least interest.

  --bg