I wanted to use the PDF of Mathematica programming: an advanced introduction by Leonid Shifrin because I can quickly search through a PDF, and also read it off-line.
Leonid Shifrin, the author, has the book at http://mathprogramming-intro.org/
I downloaded the PDF http://mathprogramming-intro.org/download/MathProgrammingIntro.pdf
There is a problem with the PDF. I am using the current Adobe Acrobat Professional DC (AGM Version 4.030.00072).
The PDF wants a signature. However, Acrobat says the signature request in the PDF is corrupted. Because of the error, Acrobat continually displays a yellow bar which you cannot close.
Is everyone having the same problem?
I emailed the author, but did not receive a reply.
Does anyone know how to fix it?
Properties | Security tab does not allow document changes.
Does anyone know how to contact Shifrin?