## Search found 10 matches

Wed Feb 09, 2011 5:24 am UTC
Forum: Mathematics
Topic: The Petersen Giraffe
Replies: 13
Views: 7322

### Re: The Petersen Giraffe

Yep, the Petersen Giraffe (Giraph) is my drawing, and the story is true. Enjoy and disseminate ... just give me credit. -e Hey evan, I loved your graph representation of the Petersen graph and used/disseminated it on my site (giving you credit of course :P). http://spikedmath.com/comics/384-the-pet...
Fri Feb 04, 2011 4:16 pm UTC
Forum: Mathematics
Topic: Need help with a math puzzle
Replies: 5
Views: 1235

### Re: Need help with a math puzzle

The problem is actually a difficult one for general k where you want to solve y^2=x^3-k for integral x and y. Unless there is a trick for when k=20, it seems algebraic number theory is required to solve it. For example, this 11 page paper uses Baker's method to find all integral solutions when k=28....
Thu Jan 07, 2010 7:06 pm UTC
Forum: News & Articles
Topic: The 232-digit number RSA-768 has been factored!
Replies: 9
Views: 4052

### The 232-digit number RSA-768 has been factored!

A paper posted today reports that they have factored the 768-bit number RSA-768 (this is a new record!).
http://mathfail.com/2010/01/the-232-digit-number-rsa-768-has-been-factored.html
Wed Oct 07, 2009 4:51 am UTC
Forum: Individual XKCD Comic Threads
Topic: 0646: "Conversations"
Replies: 83
Views: 18796

### Re: "Conversations" Discussion

I don't get it...
Is this implying people take their laptop to the bathroom? Do they?
Would it be better to put ... cell phones there instead?
Mon Oct 05, 2009 8:18 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 0645: "RPS"
Replies: 185
Views: 51093

### Re: "RPS" Discussion

Randall also posted a link just below the xkcd header image. It reads:

"COMIC TODAY'S YOU CONFUSES HERE CLICK IF."
Mon Oct 05, 2009 7:26 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 0645: "RPS"
Replies: 185
Views: 51093

### Re: "RPS" Discussion

This comic was good, better than last Friday's in my opinion ^_^
Sun Oct 04, 2009 8:43 pm UTC
Forum: Mathematics
Topic: What's the coolest thing you've ever learned in math class?
Replies: 58
Views: 6726

### Re: What's the coolest thing you've ever learned in math class?

I thought the implications of: "Given positive integers g and k, there exists a graph G containing no cycles of length at most g, such that the chromatic number of G is at least k." was neat. This problem was addressed by Erdős in 1959 and falls under the probabilistic method if you're int...
Sat Oct 03, 2009 11:35 pm UTC
Forum: Mathematics
Topic: Google Search Results
Replies: 3
Views: 1557

### Re: Google Search Results

Ha, that's a neat experiment to do. The bump at 59 is very reasonable. A ".com domain name" can have up to 63 characters in it, and due to Google's popularity gooooooooooooooooooooooooooooooooooooooooooooooooooooooooooogle.com is certain to be registered, since it's the most o's you can us...
Sat Oct 03, 2009 11:27 pm UTC
Forum: Mathematics
Topic: Graph Theory Software
Replies: 2
Views: 2979

### Re: Graph Theory Software

As far as I am aware there isn't anything that matches what you want. A lot of people I know use nauty but I haven't tried it myself. I'd be interested in such software as well. Right now I use Matlab a lot and have some files that have all the graphs of up to order 10 (which I can use to test certa...
Sat Oct 03, 2009 11:10 pm UTC
Forum: Logic Puzzles
Topic: Comic Book Store
Replies: 5
Views: 2425

### Comic Book Store

Hey guys... This is my first post so I thought I'd start with the following puzzle. I asked this on yahoo answers and every single response was wrong, so let's see if the xkcd crowd is a bit smarter :D "A comic book store is open 7 days a week. Over the course of the entire year (non leap year)...

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