Org-noter’s purpose is to let you create notes that are kept in sync when you scroll through the document, but that are external to it - the notes themselves live in an Org-mode file. As such, this leverages the power of Org-mode (the notes may have outlines, latex fragments, babel, etc…) while acting like notes that are made inside the document. Also, taking notes is very simple: just press i and annotate away!

Extracting coordinates of mouse position in a PDF file. Found on Sacha Chua's blog https://sachachua.com/blog/2021/08/2021-08-30-emacs-news/

PDF Tools is, among other things, a replacement of DocView for PDF files. The key difference is, that pages are not pre-rendered by e.g. ghostscript and stored in the file-system, but rather created on-demand and stored in memory.

This rendering is performed by a special library named, for whatever reason, poppler, running inside a server program. This program is called epdfinfo and its job is it to successively read requests from Emacs and produce the proper results, i.e. the PNG image of a PDF page.

Actually, displaying PDF files is just one part of PDF Tools. Since poppler can provide us with all kinds of information about a document and is also able to modify it, there is a lot more we can do with it.

[shaarli save link does not work here under Firefox 45.5.1/Windows or Firefox 51.0.1 (64-bit) on xubuntu, because github does not allow "foreign" JavaScript]

Asymptote is a powerful descriptive vector graphics language that provides a natural coordinate-based framework for technical drawing. Labels and equations are typeset with LaTeX, for high-quality PostScript output.

Home page of the mathematician Herbert Wilf, which offers some of his books for download. I have already read the very interesting "Mathematics for the Physical Sciences".

Good collection of tips for electronic (LaTeX) documents, revision control, PDF.