## 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 the modulo operation. If one graphs the set of points (x,y-k) with

and

such that they satisfy the inequality given above, the resulting graph looks like this:

Source

## Interesting Homemade Steel Umbilic Torus

The umbilic torus is a single-edged 3-dimensional figure created by Helaman Ferguson as a mathematical artwork. The lone edge goes three times around the ring before returning to the starting point. A cross section of the surface taken from an umbilic torus corresponds with a hypocycloid.

This sounds complicated to imagine, but it doesn’t seem that complicated to build. In fact, Trent Johnson created one for himself and a friend of his posted a complete tutorial on how to make one yourself here. Follow the link and you will find even more pictures of the project in progress.

## Hilarious Class Story #1

We all have some awesome class memories, but some are better than others.

I had a chemistry professor who would walk into the lecture hall every class and place a tennis ball on the podium. No one really thought about it that much and it was dismissed as a professorial quirk. One day a kid fell asleep in class. When the professor noticed it, he didn’t skip a beat in his lecture. Without pausing, he calmly walked to the podium, grabbed the tennis ball and hurled it at the kids head. It hit him almost square in the face. He was shocked, we laughed, fun times. The next class period the professor walked into the class like usual but this time he placed a baseball on the podium. Not one person fell asleep in that class for the rest of the semester.

Source

## The hard life of an engineer

Only engineers know what’s going on inside their heads when they come up with an unorthodox solution, but these pictures can give us a better idea. If you’re thirsty for more, go to thedistractionnetwork.com

## New York Mayor doesn’t know what even numbers are

Just listen to how the New York Mayor describes the even numbers and the number 0 in his speech about fuel rationing. Its at about 50 – 55 seconds into this clip from the BBc news site

Thanks to Greg Bradley – BBC News for this submission!

## Shitload Of Math Due Monday, Students Say

OLD BRIDGE, NJ—In what many are calling a complete bullshit move, Riverside High School algebra teacher Mrs. Trella, 34, assigned her sixth-period class an assload of math homework due Monday.

The homework, which included a number of impossible to solve word problems, several stupid equations, and a bunch of other pointless crap, was assigned at the end of class on Friday. According to sources, Trella handed out the homework at approximately 2:43 p.m., even though it was a completely unfair thing to do and would totally screw over everyone’s weekend.

“She assigned it right before the bell rang,” said ninth-grader Kenny Riley, who claimed that the last thing he needed was to spend all day Sunday looking at some retarded math book. “I was packing up my stuff to go when Mrs. Trella comes out of nowhere and gives us, like, four huge pages of work to take home.”

## Amazing Fractal video from Fractal Lab

Fractal Lab is a great software that will give you the possibility of generating 3D fractals from your own personal computer. Here are just some of the fractals you can create.

If you want to see the full video of Fractal Lab in use, click here.

## Test Fail Compilation

When you’re not the one taking them, tests are always fun. Have a look at some of the funniest tests fails here and if you want to see even more, go to testfails.com

## Red Riding Hood and the Big Bad Bolzano-Weierstrass Theorem

Do you want to hear a different kind of bedtime story? This one won’t leave you disappointed.

Source: people.math.sfu.ca

## Bayesian Jokes

Bayesians are not known for being humorous people, but that doesn’t mean we can’t joke about them! If you want to see other ways to poke fun at Bayesians or how they make fun of themselves, go to http://www2.isye.gatech.edu/~brani/isyebayes/jokes.html

A Bayesian is one who, vaguely expecting a horse, and catching a glimpse of a donkey, strongly believes he has seen a mule.

Bayesian: Breeding a statistician with a clergyman to produce the much sought honest statistician.

Only a Bayesian Statistician is able to coherently explain the statement: If there is a 50-50 chance that something can go wrong, then 9 times out of ten it will.

A Bayesian: one who asks you what you think before the clinical trial in order to tell you what you think afterwards.