The other day I was tying to make some multi-set Venn diagrams with polar symmetry, which it turns out is harder than you'd think and has ties with prime number theory. It's an obscure but important area of combinatorics. Everybody knows a 3-set one (n=3), and I made a 5-set one with ellipses (pictured to the right). After that, I was stumped. That led me to a great web section maintained by Professors Frank Ruskey and Mark Weston. The Dwarf diagram at the top is based on that work, with Sleepy a little more opaque so you can see the shape. Ruskey and Weston display lots of lovely diagrams, including the elusive n=7 minimum vertex Venn diagram and the remarkable n=11 Venn diagram.
On Thursday May 26, Red Nose Day will return for the second year. It's all about giving to children to fight hunger, sickness, and homelessness. In the video above, the most famous magician in the world, David Copperfield, has his own magical way of asking you to get involved. There's going to be a two-hour TV show on… READ THE REST
Facebook gets a bad rap, but where I live, it has brought neighbors together, and it started because of the things I didn't want to share. READ THE REST
When the Congressional Science committee wants to talk about the cold weather, and when NASA has to defend their budget by explaining why NASA is important, it can make people who believe in facts… a bit tense. READ THE REST
Whether you're a professional builder or a well-equipped dad, nothing beats good old measuring tape. But as we're about to enter 2022, perhaps there's a more efficient tool to carry around, negating the need for not only measuring tape but that entire toolbox you've been lugging around all these years. Whether you're measuring a space… READ THE REST
We thank our sponsor for making this content possible; it is not written by the editorial staff nor does it necessarily reflect its views. Have you ever been interested in learning more about a career in photography? Nowadays, with most brands relying heavily on digital marketing, learning professional photography skills can increase your chances in… READ THE REST
We thank our sponsor for making this content possible; it is not written by the editorial staff nor does it necessarily reflect its views. Having a clean, uncluttered desk can do wonders for your peace of mind. But, it's rarely convenient and feasible to have a central location to keep the magazines, pens, pencils, newspapers,… READ THE REST