How can you have a proof without proving anything? Mathematicians found a way and, in the process, came to blows over it – but 100 years on, this trick is a common part of modern maths, says columnist ...

The core concepts of financial mathematics include understanding percentages and their role in calculating changes in value or price, and exploring two types of interest – simple and compound. These ...

Using this mode it can be easily (using 3 keystrokes … it’s Emacs) to PDF or HTML to make it more readable (and add a table of contents). Please don’t try to “beautify” it with any other text editor ...