> I don't actually think so, I can actually see the jagged edges.
>
> >The criterion "beautiful / not awful" is maybe important for artwork, but for
> >mathematics, in my opinion, the criterion for displaying math on the web ought to
> >be "exact". Formulas available as bitmaps cannot be modified and will always be
>
> Sure, but in my opinion it should be *readable*.
Needless to say :-) Do you mean you couldn't read the formulas?
> And if I
> would print it, it would be much worse. For printing, antialiased graphics
> makes the result *worse*. This is because printers can't do true grayscales
> but have to dither it.
We were speaking about reading on screen, and finding text in pdf vs html files,
etc. I didn't suggest to print from html versions, for printing, it is better to
use dvi or ps version of course, formatting can be better anyway.
> I believe this would be a bug either in the PDF file or in the PDF reader
> software. Most probably a missing or bad font in the reader, or possibly a
> broken font in the PDF creator.
> It is fixed by fixing the PDF creator software or the reader.
Yes, but by whom and when? If I need a formula right now and the reader is broken
or some font is incorrect and I am not aware of it, I read an incorrect result.
With bitmap equations, with the sole condition that the reader displays correctly
a bitmap, I can be sure all equations will be displayed correctly. If an html
browser would display incorrectly bitmaps, it can be seen immediately. In a
bitmap, the formula is embedded for ever in its exact form, as it is on paper. In
a pdf file with vector fonts, the image of the equation is recreated each time
the equation is displayed or printed, and each time it can be recreated
incorrectly.
> >In short : with pdf and vector fonts, there is no way to guarantee that a
> >formula, displayed correctly for somebody, will be displayed correctly for
>
> I think it can be quaranteed by embedding the math font into the PDF file.
> For example pdflatex does this for certain fonts.
Yes, it is certainly necessary, but not sufficient in my opinion, as new bugs can
be introduced anytime in a new version of the reader.
Michel.Lavaud@univ-orleans.fr
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