Re: math detail

["Yue Wang" <yuleopen@gmail.com>]

>
> I see the pictures and they demonstrate how weird the problem is:
> In the case of "V\high{0}" the "0" is higher than in "$V^0$",
> and yet the interline space gets NOT disturbed!!!
>
> Or put it the other way round:
> You use $V^0$, which doesn't move the "0" as high as "\high{0}" would do,
> and nevertheless the distance to the line above gets increased!!!
>

TeX did this quite right, I think.
The bounding box of the inline formula looks ok.


Concerning your \high stuffs:

you can read the code and it is quite clear that the box dimension has
nothing to do with those within \high{}, no matter where the 0 is
placed, the bounding box of "V\high{0}" is still the same:

\def\dodohighlow
  {\ifx\fontsize\empty
     \ifmmode
       \ifnum\fam<0 \tx \else \holamathfont \fi
     \else
       \tx
     \fi
   \else
     \tx
   \fi}

\def\dohighlow#1#2#3#4#5% todo, named fontdimens
  {\dontleavehmode
   \bgroup
   \scratchdimen\ifdim\fontexheight\textfont2=1ex #2\textfont2\else #3ex\fi
   \advance\scratchdimen #4ex
   \kern.1ex
   \setbox\scratchbox\hbox{#1\scratchdimen\hbox{\dodohighlow#5}}%
   \ht\scratchbox\strutheight
   \dp\scratchbox\strutdepth
   \box\scratchbox
   \egroup}

\unexpanded\def\high{\dohighlow\raise\mathsupnormal{.86}{0}}
\unexpanded\def\low {\dohighlow\lower\mathsubnormal{.48}{0}}



>
> 1) This doesn't make sense, does it?
> 2) Why gets the line space increased even though the "0" is not that high?!
> 3) How can the behaviour of "$V^0$" be adjusted in such way as "\high{0}"
> does

if it is quite right, why adjust it?


> (i.e. set the "0" but dont move away from the line above)
>
>
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