Today, March 14th, is pi day! I guess the non-geeks don’t celebrate pi day, but thankfully, Google is the king of geeks. Happy pi day everyone!
You can see in Google’s “pi day logo” at their homepage has some famous formulas, including:
- the famous area of a circle formula: A = pi r^2
- the function sin x, with one period plotted
- Archimedes’ calculation of pi, namely: 223/71 < π < 22/7
- volume of a sphere: V = (4/3) pi r^3
- volume of a cylinder: V = pi r^2 h
- circumference of a circle: C = 2 pi r
James (@jamesgrime) and Brian (@shwood) have a promo on youtube for an event coming up that they are doing right now!!
They are attempting to perform the world’s largest mathematical magic trick on twitter.
Visit their youtube video and “Pi Day Magic” for more information.
My love for you is just like pi,
Irrational and never-ending.
You’re the one who squares my i,
Time for reality, no more pretending.
Like the summation to infinity of one over n,
Like the domain of x squared, our love has no end.
A divide by zero, it’s undefined;
Equations to explain it you cannot find.
As the limit approaches infinity,
You’re the ln of e for me.
You’re perfect like 9, 16, or 25,
My constant like e to the x, derived.
We’re perpendicular in our affection,
Every point leads to our intersection.
This is no logistic growth, there’s no upper bound;
There’s no one I’d rather have around.
(via Reddit) created this “pi lullaby“, it’s pretty awesome! Turil says…
“It’s an mp3 file that I hope works for you. I made it with my speech to
text option on my Mac, using the Pipe Organ voice and text edit. I find
it very relaxing…”
This is interesting. RandomPairing over at the math subreddit listed some rules for a game called Topological Poker (aka Dicks and Hoes), which I assume he created himself. [I did a google search for "Topological Poker" and only got the subreddit, and then did a search for "Dicks and Hoes" and got a bunch of dirty sites but no poker ones.]
“There are four ranks of cards, instead of the usual 13. Instead of 2 through Ace, cards are ranked according to the topological classification of their symbol … 2,3,5,7,J,K all have the same property that they can be deformed into a dot or line. These are the lowest ranked cards. In fact, by themselves they’re worth dick–hence the name for these cards.
4,6,9,A are topologically the same as a ‘o’, and hence are called holes, ohs, or–if you can get away with it–hoes. These are the second ranked cards in ascending order.
10 is in a class by itself because it’s a combination of a dick and a hoe, so it’s called a Split, and is third ranked.
8,Q are topologically the same because of the way the Q is made on cards, with the slash going all the way across and creating two holes. This is the highest rank–the double hoe, or just double.“
Go to the reddit link to find out the rules of play.
Take a look at the website for the “Antarctica Journal of Mathematics”. Reminds me of the websites that flooded the net back in the 90′s.
Yup, those stars are supposed to be flashing!!
Link to journal.
Link to reddit discussion about it.