[l2h] Black bars under integral signs when the limits of integration are -\infty and +\infty or an algebraic fraction for each of the upper and lower limits

[Pat Somerville]

Thanks, JOS, for kindly taking the time to reply to me.  Did you find your
workaround solutions to eliminate unwanted black line segments to work in a
version of LaTeX2HTML different from the one I am using?  I tried the two
workaround solutions you mentioned with LaTeX2HTML Version 2008 (1.71):

1) $DVIPSOPT = ' '; in the file /usr/lib/latex2html/l2hconf.pm in place of
$DVIPSOPT .= " -E";              ;

2) Including the line "transform round exch round exch itransform" right
after the line "gsave newpath" in the file
/usr/lib/texmf/dvips/config/alt-rule.pro [The path for the file alt-rule.pro
is slightly different in LaTeX2HTML Version 2008 (1.71) than the path
mentioned within the version of the file alt-rule.pro replacing alt-rule.pro
in LaTeX2HTML Version 2008 (1.71).].

And for the tests I returned to "$MATH_SCALE_FACTOR=1.6;", without the
double quotation marks, within the file /usr/lib/latex2html/l2hconf.pm.  But
unfortunately in my case the workaround 1 and the combination of the
workarounds 1 and 2 did not remove the unwanted black line segment
underneath an integral sign in the .html file produced by a latex2html
command working with the .tex file containing the LaTeX command \int\limits
_{-\infty}^{+\infty} within an equation environment.  I also tried single
quotation marks or apostrophes in place of double quotation marks in the
line $DVIPSOPT = " -E"; in the file l2hconf.pm; but still the unwanted black
line segments remained within the produced .html file.   So I still request
help to remove the unwanted black line segments underneath some of my
integral signs.

Pat

--------------------------------------------------
From: "jos" <j at w3k.org>
Sent: Monday, April 11, 2011 5:02 PM
To: "Pat Somerville" <l_pat_s at hotmail.com>
Cc: <latex2html at tug.org>
Subject: Re: [l2h] Black bars under integral signs when the limits 
ofintegrationare -\infty and +\infty or an algebraic fraction for  each of 
the upper and
lower limits

> Here is how I got around the black-bar problem:
>
> https://ccrma.stanford.edu/~jos/webpub/Eliminating_Black_Rules_Equation.html
>
> - jos
>
> At 12:15 PM 4/11/2011, Pat Somerville wrote:
>>Thanks, Nasser M. Abbasi, for kindly taking the time to reply to me.  I
>>found the file /usr/lib/latex2html/l2hconf.pm.  In it among other lines
>>the following lines existed, but not necessarily consecutively:
>>
>>$DVIPSOPT .=" -E"; (Please notice the period before the equals sign.)
>>
>>$MATH_SCALE_FACTOR=1.6;
>>
>>#$DISP_SCALE_FACTOR=1;
>>
>>So after receiving your e-mail letter I changed two of those lines to
>>read:
>>
>>$MATH_SCALE_FACTOR=1.8;
>>
>>$DISP_SCALE_FACTOR=1.0;
>>.
>>Results in the .html file produced by LaTeX2HTML: The black line segment
>>under the integral sign with the limits of integration having algebraic
>>fractions in them was removed.  But the black line segments under integral
>>signs produced from the LaTeX commands containing \int\limits
>>_{-\infty}^{+\infty} remained.  Those were probably among 27 reported
>>errors on 27 images.  I don't know with which images all of the other
>>errors were. But I think I remember at least one pnmcrop-related error
>>while latex2html was processing my .tex file.
>>
>>Next I changed to $MATH_SCALE_FACTOR=2.0; in the file l2hconf.pm and
>>otherwise did not change any other lines in that file.
>>
>>Results: There were errors on 27 images.  The black segment under the
>>integral sign with algebraic fractional limits returned.
>>
>>Continuing with the same settings in l2hconf.pm I made a test, .tex file
>>containing some commands very similar to
>>
>>\begin{equation}
>>\int\limits _{-\infty}^{+\infty}
>>\end{equation}
>>
>>and then produced a .html file from that .tex file using a latex2html...
>>command.  In the resulting .html file a black line segment existed under
>>the integral sign with the limits of positive and negative infinity.  What
>>should I do now to try to eliminate the unwanted black line segments under
>>some of the integral signs?  Note also that there were also around 20
>>images with errors reported while latex2html attempted to generate them;
>>and in detail I don't yet know what obvious problems there were, if any,
>>with the associated mathematical symbols associated with the images for
>>which errors were reported by LaTeX2HTML.
>>
>>Pat
>>
>>--------------------------------------------------
>>From: "Nasser M. Abbasi" <nma at 12000.org>
>>Sent: Monday, April 11, 2011 1:37 AM
>>To: <latex2html at tug.org>
>>Subject: Re: [l2h] Black bars under integral signs when the limits
>>ofintegrationare -\infty and +\infty or an algebraic fraction        for
>>each of the upper and lower limits
>>
>>>On 4/10/2011 10:29 PM, Pat Somerville wrote:
>>>
>>>>Question: What can I do to eliminate all of such examples of unwanted
>>>>black bars
>>>>  underneath some of the integral signs?
>>>
>>>This sounds like the same known problem which was mentioned here some
>>>time ago?
>>>
>>>Check  http://12000.org/my_notes/l2hwin/index.htm  and look for
>>>
>>>item (2) under "some errors and possible solutions"
>>>
>>>Here it is:
>>>
>>>"some of the bitmap images produced for the mathematics in the
>>>document have a solid dark bar, usually at the bottom or the
>>>side of the bitmap image. The reason for this is unknown.
>>>But I found by trial and error that setting the following
>>>values in my l2hconf.pm eliminated most if not all of these
>>>
>>>$MATH_SCALE_FACTOR = 1.8;
>>>$DISP_SCALE_FACTOR = 1.0;
>>>
>>>"
>>>
>>>Something to try to see if it will fix your problem.
>>>
>>>--Nasser
>>>_______________________________________________
>>>latex2html mailing list
>>>latex2html at tug.org
>>>http://tug.org/mailman/listinfo/latex2html
>>_______________________________________________
>>latex2html mailing list
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>>http://tug.org/mailman/listinfo/latex2html
>
>