Description: Connect the value of the preliminary map from vectors to functionals
I to the hypothesis L used by earlier theorems. Note: the
X e. ( V \ { .0. } ) hypothesis could be the more general
X e. V but the former will be easier to use. TODO: use the I
function directly in those theorems, so this theorem becomes
unnecessary? TODO: The hdmap1cbv is probably unnecessary, but it
would mean different $d's later on. (Contributed by NM, 15-May-2015)