: A tool to crop the pages of PDF files
krop is free software, that I wrote and released under GPLv3+ in the sole hope that you or someone else may find it useful.
It is written in Python and relies on PyQT, python-poppler-qt5 and PyPDF2 for its functionality.
A unique feature of krop is its ability to automatically split pages into subpages to fit the limited screen size of devices such as eReaders. This is particularly useful, if your eReader does not support convenient scrolling.
: A gentle introduction and implementation
The PSLQ algorithm finds integer relations among a set of real numbers. This is an introduction suitable for advanced undergraduate students.
A very basic and naive implementation for Mathematica is also included.