Search found 8 matches

by dan131m
Sat Dec 24, 2011 1:02 am UTC
Forum: Mathematics
Topic: How come there is no such thing as 1 dimensional geometry?
Replies: 14
Views: 3731

Re: How come there is no such thing as 1 dimensional geometr

doogly wrote:I was talking about differential geometry.


And I was replying to the other guy :)
by dan131m
Fri Dec 23, 2011 6:14 pm UTC
Forum: Mathematics
Topic: How come there is no such thing as 1 dimensional geometry?
Replies: 14
Views: 3731

Re: How come there is no such thing as 1 dimensional geometr

jestingrabbit wrote:No, they're one dimensional curves *inside* a 2D plane. Like Doogly said, intrisic boring, extrinsic, interesting.


Not true. Elliptic curves can be characterized intrinsically via Chevalley's theorem on algebraic groups.
by dan131m
Fri Dec 23, 2011 7:54 am UTC
Forum: Mathematics
Topic: How come there is no such thing as 1 dimensional geometry?
Replies: 14
Views: 3731

Re: How come there is no such thing as 1 dimensional geometr

I think elliptic curves are a pretty successful example of one-dimensional geometry...
by dan131m
Fri Dec 23, 2011 7:52 am UTC
Forum: Mathematics
Topic: Show us your articles! Or what's your Erdos number?
Replies: 187
Views: 272978

Re: Show us your articles! Or what's your Erdos number?

Finally wrote my first paper. Hopefully many, many more to follow.

http://arxiv.org/abs/1112.3952
by dan131m
Fri Dec 23, 2011 7:49 am UTC
Forum: Individual XKCD Comic Threads
Topic: 0994: "Advent Calendar"
Replies: 74
Views: 22398

Re: 0994: "Advent Calendar"

Surely I can't be the only one who thought the title text would be along the lines of, "But everyone knows that you'll somehow finish by December 8 anyway."
by dan131m
Mon May 10, 2010 8:02 pm UTC
Forum: Mathematics
Topic: number theory, no of primes
Replies: 3
Views: 855

Re: bumber theory, no of primes

Note that for x = 2500 the right-handle side is less than four.
by dan131m
Thu Mar 18, 2010 7:49 am UTC
Forum: Individual XKCD Comic Threads
Topic: 0715: "Numbers"
Replies: 185
Views: 51409

Re: "Numbers" Discussion

I like that there's a severe dropoff between 9th grade / freshman and 11th grade / junior, presumably due to a widespread inability to spell the word "sophomore." (Also, note that all those grades get doubled up, because you're a freshman in high school and then again in college...)
by dan131m
Mon Oct 19, 2009 6:54 am UTC
Forum: Individual XKCD Comic Threads
Topic: 0651: "Bag Check"
Replies: 206
Views: 53685

Re: "Bag Check" Discussion

What gets to me isn't the ridiculousness of security procedures so much as the fact that there's just this huge gulf between us and the rest of the population. I cannot think of very many people that I know who don't understand this kind of observation for precisely what it is -- an observation. And...

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