Harmonic Function Theory
axler.net
axler.net
See also: https://oeis.org/
Naturally, Wolfram hired the creator and the project nearly died. A couple of heroes stepped in to create a second generation, but it's just too hard to continually compete with a multi-billion dollar company.
No idea how OEIS is involved.
Appreciate!
After doing it both ways, I really appreciate introducing vector spaces and linear transformations before even touching matrices.
> Printing has been disabled from within this pdf file, so although you can view the entire book, you will not be able to print it.
Yeah, I don’t believe that. The goal of the author is admirable. I feel like they got fooled somehow, but maybe they do understand and are just hinting that if you’re going to read it, kick them some cash.
The PDF format does actually let documents instruct PDF processors to disallow printing [0]; Acrobat Reader (if nothing else) presumably respects these instructions, even though they're obviously possible to work around.
[0] e.g., https://opensource.adobe.com/dc-acrobat-sdk-docs/pdfstandard..., p. 123, Table 3.20, "User access permissions", and probably others that I can't find right now
First, you could screenshot each page, and print that. That's a lift.
Second, It's not that hard to extract text from pdf file formats. That's also a lift.
but like, it's not that complicated. yes, text flow, font selection, on and on, but it's just postscript. Pull the text and print it. It's signed not encrypted. It's challenging to implement pdf. javascript support is nuts, for example.
But if you just want to pull the text? there's not much to it.
Pay the author. It's not much. But like, it's not locked down.