Search found 10 matches

by SpikedMath
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...
by SpikedMath
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....
by SpikedMath
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
by SpikedMath
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?
by SpikedMath
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."
by SpikedMath
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 ^_^
by SpikedMath
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...
by SpikedMath
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...
by SpikedMath
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...
by SpikedMath
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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