« first day (1602 days earlier)   

12:00 AM
To you a graph is not a graph, then...
 
@ted but that would only work for planar graphs so it would be trouble
 
I wonder if they offer graph theory as a summer course or something. I should actually take it at some point.
 
I wrote a section about graphs in my linear algebra book. I guess I should reread it :P
 
@beginner We're restricting to the set of planar graphs here.
 
No, @Kaj, only in springs.
 
12:01 AM
@KajHansen I think the book I used was West's book. It's the one Studentmath used - you might ask him. Great exercises.
 
@mike do you have hints on making dual graphs by hand easily?
 
Nope
Draw some dots and some lines and stuff.
 
@Kaj: After having taught probability, I now firmly believe I should have taken it in college and would encourage every math major—no matter how "pure"—to take it.
 
Welcome to this chat @wendy.krieger. I see you have many answers. You really deserve more points for them.
 
I believe in nonplanar graphs, the number of faces changes depending on the location of the vertex
 
12:01 AM
@TedShifrin probability was very neat
 
@TedShifrin, I'll take that advice into serious consideration for next fall.
 
You'll be safe, @Kaj. I'll be gone :P
 
It takes a lot for me to say that something from analysis was very neat.
 
I ended up with 11 A's and A-'s out of 29, so not that bad ... :)
 
Hello. I have not asked a question
 
12:02 AM
@mike I had another theorem, but I couldn't prove it so it is probably wrong, but the graph of a 3d object(other than a sphere), does it have one less face than the 3d object does?
 
@DonLarynx It's not true that the number of faces depends on the embedding of the graph in the plane.
 
Yes, @Alex, I realize that was scary for you.
 
I'm actually not entirely sure what I'll be taking next year. I have to sit down and think about that at some point...
 
@TedShifrin I now believe that every math major should take every math course offered.
 
Impossible, @Jasper, therefore ruled out.
hi @wendy
 
12:03 AM
I'm sorry, @beginner, but the question doesn't make sense to me.
@TedShifrin I did it.
 
@TedShifrin It is possible if the department doesn't offer that many.
 
Oh yes. I could take crypto. Some more abstract algebra for me <3
 
well, @Mike, you were at a tiny school :P
 
Hi ted,
 
@mike cube has 6 faces, and its graph has 5, is this the same for all 3d objets
 
12:03 AM
@Mike What is a face?
 
OK, no argument there, @Kaj.
 
@KajHansen Crypto is the bomb man. Do it.
 
@mike other than a sphere
 
No, @beginner. The 'outside' face is still a face.
The graph assoc'd to it still has six faces.
 
I dunno if we're offering crypto next year ... I hope we do, @Kaj. Bug Lorenzini about it.
 
12:04 AM
@TedShifrin, I'm fairly certain we are, but I could be wrong.
 
If you're not counting that as a face (and you should! because it is!), then yes, you're correct.
 
@mike wait WHAT?
 
That big unbounded region counts as a face.
 
I am out of the loop now, @Kaj ... and a few of my evaluations said I'm retiring, so I don't care any more :) Maybe they're right.
 
Should probably take transforms before graduating as well...
 
12:05 AM
What's a transform, @Kaj?
 
@mike I thought each contained area of the planar graph was the only faces??
 
"big, unbounded region" I don't understand @Mike
 
Well, @Kaj, it needs students this spring or it won't run.
 
That's why I need to take the class @MikeMiller :)
 
Most of my maths is home grown, so it's hard to get the terms right.
 
12:05 AM
So outside the square that infinite region is a face......????
 
@wendy.krieger What do you mean by home grown?
 
@beginner Check your definition - but if it doesn't include the infinite region, it's the wrong definition.
@DonLarynx That's fine.
@KajHansen oh.
 
@Mike: discrete Fourier transform, SVD decomposition, Fourier, Radon ...
 

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