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Indeed. Please consider paying for it. Mathematicians aren't rolling in cash.

> Doron Zeilberger's decision to make it available

We don't know if it was a decision or a permissions error.

I'm guessing (hoping) permissions error since there is PII in the same directory.

Out of interest, what does "PII" stand for? I can't seem to locate it in the directory or on google.

"Personally identifying information".