# Cool Facts

## Famous Mathematician of the Day

23th November 2012 marks 408 years since the death of Francesco Barozzi, an Italian mathematician, astronomer and humanist. Barozzi was born on the island of Crete, at Candia (now Heraklion), at the time a Venetian possession, the son of Iacopo Barozzi, a Venetian nobleman. He was educated at Padua, and studied mathematics at the University …

## Why I never wanted to be an archaeologist

As you can see in the picture below, you can use all 3 shards from each column and each row to create a complete plate. That explains why no one bothered to dig them up for so many years! Credit: Lee Sallows

## Why does the shower curtain move towards the water?

The worst part about taking a shower is getting attacked by the wet shower curtain. Luckily, David Schmidt discovered a logic explanation for why this happens so often and you are about to hear it. To do the calculation, I drafted a model of a typical shower and divided the shower area into 50,000 minuscule …

## The fourth dimension: Tesseract 101

The Tesseract is the four dimensional analogue of a cube and it is also known as a hypercube. Because imagining a four dimensional object is impossible, you will have to try to take it all in from this picture. An even better example is a moving image: You can read everything you need to know …

## Tupper’s self-referential formula

Tupper’s self-referential formula is a self-referential formula defined by Jeff Tupper that, when graphed in two dimensions, can visually reproduce the formula itself. It is used in various math and computer science courses as an exercise in graphing formulae. The formula is an inequality defined by: where [.] denotes the floor function and mod is …

## Easy way to memorize the value of e

Thatâ€™s a 20 dollar bill, so memorize â€œ2â€³ and put down the decimal point. The picture on the bill is of Andrew Jackson. He was our seventh President, so put a â€œ7â€³ after the decimal point to get 2.7. Jackson was elected in 1828, so put down â€œ1828â€³ next. Since thereâ€™s a 2 in front …

## Mathematics art in The University of Manchester

While walking randomly, the guy behind http://www.walkingrandomly.com/?p=4203 discovered something interesting on the windows of an old building from The University of Manchester. This mathematics themed stained glass window is part of The Sackville Street Building and it seems that other mathematical windows can be found in buildings from around the world, including Caius College, Cambridge.

## How high can you count? – The powers of 10

Did you ever think about how far you can count? Here are some of the names of the powers of 10. English names of the first 10000 powers of 10 10 to a power (number of 0’s after the 1) Latin power (number of 000’s after the 1) prefix cardinal (determines letters before the illion) …

## Complex Roots Made Visible — Math Fun Facts

This is a neat way you can visualize complex roots of quadratics. What you do is take a quadratic like: 2x^2 – 8x + 10 If you tried to factor or find real roots of this quadratic, you will run into problems. In fact, this polynomial has two complex roots (but no real roots). According …

## Tautochrone curves

This is pretty neat! A tautochrone curve is one where the time taken by an object sliding down (without friction in uniform gravity) to the bottom is INDEPENDENT of the starting position. As seen above, all four points end up at the bottom at the same time! More info on wikipedia: http://en.wikipedia.org/wiki/Tautochrone_curve