[OS X TeX] Sierra 10.12.4

[Ross Moore]

Hi Bruno,

On 5 Apr 2017, at 17:15, Bruno Voisin <bvoisin at icloud.com<mailto:bvoisin at icloud.com>> wrote:

Le 5 avr. 2017 à 02:28, Ross Moore <ross.moore at mq.edu.au<mailto:ross.moore at mq.edu.au>> a écrit :

The metadata does not report this file as having been created by TeX software.
Maybe it has undergone some post-processing, resulting in Metadata
being lost or suppressed.

My conclusion: not an issue regarding LaTeX production of PDFs.

Hi Ross,

TeX must have been involved in some way, as the fonts include RMTMI and MTEX, which are MathTime 1.1 fonts, and CMEX10.

The other fonts are Helvetica and Palatino-{Roman,Italic,Bold}, in Type 1 format. The names show it wasn't standard TeX-Live-style TeX (otherwise the URW clones would be used), or if so then some post-processing involving font substitution was performed.

The names (Helvetica, Palatino) are those of the Mac fonts, so maybe it was Textures.

But surely Textures would have left its signature in the Metadata.

Not sure about very old TeX methods, but these days using  pdftex, hyperref and other engines,
there is certainly metadata included.

Something else may have acted after TeX had finished building this PDF.
What that was?  Who knows.


The file is from the book Abel's Proof by Peter Pesic, from 2003, so the production process must relate to the TeX of that time:

http://www.jstor.org/stable/j.ctt1dnnc74
http://www.peterpesic.com/abels-proof/

Something has placed an annotation across the whole front page, with FitH property.
This may have been a way to try to get the document to open as "fitting to screen”.

These days you just declare an “Open Action” to achieve this, using hyperref.
(indeed it may even be the default for hyperref, so you don’t know that you are actually doing it.)

The result is that the actual annotation no longer satisfies the PDF specifications,
if it ever did. My guess is that it was always wrong, but never noticed because
people tend not to check specifications, only how a PDF actually looks.

        "There are lots of bad PDFs out there”  — Adobe software engineer.




Bruno


Cheers

Ross


Dr Ross Moore
Mathematics Dept | 12 Wally’s Walk, 734
Macquarie University, NSW 2109, Australia
T: +61 2 9850 8955  |  F: +61 2 9850 8114
M:+61 407 288 255  |  E: ross.moore at mq.edu.au<mailto:ross.moore at mq.edu.au>

http://www.maths.mq.edu.au


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