sfmath package I find that there is too little space between some symbols. In an expression like
$n_1$ for instance the subscript is too close to the base. Although the space between the symbols seems to be the same as with the computer modern font the space will look larger with the latter font because of the serif of the n which pushes the subscript a little to the right. Does anyone know if there is a space corrected version of sans serif math?
There is no chance to get correct spacing if the font has not been especially designed for math, because it requires fine tuning of many parameters.
There is a commercial
hvmath font (http://www.micropress-inc.com/fonts/hvmath/hvmain.htm), with the free versions there's not much to do.