If you love math puzzles, you'll love this sequence, discovered by mathematician Lionel Levine in 1997. Neil Sloane, founder of the OEIS (On-line Encyclopedia of Integer Sequences), explains the Levine Sequence – which escalates incredibly quickly – for numberphiles at any math level.
I don't understand the 1985 paper, "Higher Algebraic K-Theory of Schemes and of Derived Categories [PDF]," by Robert Wayne Thomason and Thomas Trobaugh. But Thomason's introduction is fascinating. He says the paper was co-written by a simulacrum of his late friend Thomas Trobaugh who appeared in Thomason's dreams. The first author must state that his… READ THE REST
A Pringle is a hyperbolic paraboloid. Mel Magazine invited several mathematicians to analyze the delicious geometry of the chip. From Mel: Theron Hitchman, Professor of Mathematics at the University of Northern Iowa: Usually, the way mathematicians talk about this kind of thing is in an equation, but I think equations tend to scare people off,… READ THE REST
When I was a mechanical engineer in 1990, I faced a stubborn problem with the design of a disk drive baseplate (an aluminum base that the disk motor and actuator motor were mounted on). When the prototype drive spun up, the baseplate vibrated so much that the read/write heads couldn't stay on track. The first… READ THE REST
DIY. It's a magical word. Or, more specifically, three words. Do it yourself means something in the tech arena, so this collection of cool projects to assemble from component pieces not only leaves you with something fun at the end, but it bolsters your knowledge and electronics abilities along the way. These 10 kits are… READ THE REST
Cats…well, they just don't care what you think. Sure, they love you in their own way. But they've got their own agenda. And what you want … is usually pretty far down their priority list, even if it's in their own best interests. That often includes items related to their own health, including dental care.… READ THE REST
You've got a big ole TV. It's 55"…or 65"…or 75". It's glorious. Absolutely glorious. But while its brilliance is obviously sublime, that could blind you to a couple of other facts to consider. Like how staring at a bright TV against an otherwise dark wall at night actually disrupts how our eyes measure light. Rather than… READ THE REST