A recent advance in geometry makes heavy use of Ramsey’s theorem, an important idea in another field — graph theory. Ramsey’s theorem states that in any graph where all points are connected by either ...

You can make a line graph in Excel in a matter of seconds using data already entered into the spreadsheet.

When you communicate with others you have some responsibility to ensure they understand your message. It doesn’t matter whether you share information at work, try to convince someone to buy your ...