Search found 62 matches

by archgoon
Fri Dec 25, 2009 5:55 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 0680: "December 25th"
Replies: 148
Views: 24291

Re: "December 25th" Discussion

Forget all this Jesus talk, let's celebrate Sir Isaac Newton's birthday! Unfortunately even that has problems. Newton technically was born on January 4th according to the modern Gregorian Calendar. He was born on December 25th on the Julian Calendar. Isn't it funny how _nothing_ is simple? http://e...
by archgoon
Wed Jul 29, 2009 5:48 am UTC
Forum: Mathematics
Topic: Is my calculator wrong?
Replies: 13
Views: 2429

Re: Is my calculator wrong?

Is this correct? A far less weighted (and answerable) question would be: "Is this standard?". Computer languages that implement a exponentiation operator say: Python: Right Most associative Ruby: Right Most Associative Mathematica: Right Most Associative MATLAB/Octave: Left Associative R:...
by archgoon
Mon Aug 25, 2008 6:05 am UTC
Forum: Individual XKCD Comic Threads
Topic: 0467: "X Girls Y Cups"
Replies: 217
Views: 61762

Re: X Girls Y Cups Discussion

and the eigenvalues are...
66209
-58456
63.9
32.1
2.94
-.089 + .2737i
-.089 - .2737i
-.0187
by archgoon
Wed Jul 30, 2008 5:47 am UTC
Forum: Mathematics
Topic: Mathematicians on wikipedia display liberal bias
Replies: 35
Views: 5903

Re: Mathematicians on wikipedia display liberal bias

>>No it's not. Like I said, she believed the point of the FLT was proving it with Fermat's tools (or alternately, proving that it was impossible with the mathematics Fermat had at the time). Thus she felt that Wiles' work was a bit of a cheat. Then she's an idiot (spare me her high IQ ratings). Furt...
by archgoon
Fri Apr 25, 2008 8:58 pm UTC
Forum: Mathematics
Topic: Subtracting signed numbers
Replies: 22
Views: 2207

Re: Subtracting signed numbers

Woah, thanks Yakk. Out of curiosity, did you just check the wikipedia page, or do you have previous experience coding large integer applications?
by archgoon
Fri Apr 25, 2008 9:28 am UTC
Forum: Mathematics
Topic: Subtracting signed numbers
Replies: 22
Views: 2207

Re: Subtracting signed numbers

So what if comparison has linear time complexity? So does subtraction. From a Big-O point of view, nothing changes by adding a comparison.
by archgoon
Thu Mar 20, 2008 3:10 am UTC
Forum: Mathematics
Topic: How far does high school math go?
Replies: 39
Views: 5788

Re: How far does high school math go?

You are using more set notation then I remember from 6 years ago. Also, proofs were largely unheard of, outside of Geometry's two-column proofs.
by archgoon
Mon Mar 17, 2008 9:40 pm UTC
Forum: Mathematics
Topic: "Oh no! We forgot how to say... math... stuff!"
Replies: 294
Views: 90892

Re: "Oh no! We forgot how to say... math... stuff!"

But... wouldn't that mean we'd need two different kinds of currency whose respective values can not be compared together in a ratio? That seems pretty inconvenient. :/ UNLESS you put all purchasable products into two different categories (probably goods and services) and said that, say, "real&...
by archgoon
Mon Mar 03, 2008 5:21 am UTC
Forum: Individual XKCD Comic Threads
Topic: 0391: "Anti-Mindvirus"
Replies: 377
Views: 81063

Re: "Anti-Mindvirus" Discussion

http://forums.xkcd.com/viewtopic.php?f=7&t=19180 Stop racing. flashman doesn't even have the alt text up. How does that count? He posted first, making all the other threads dupes. Check the rules post. You need to post the comic, and you need to provide commentary. I suspect that you need to pr...
by archgoon
Fri Feb 01, 2008 4:52 am UTC
Forum: Mathematics
Topic: Is 0 real?
Replies: 43
Views: 10112

Re: Is 0 real?

tennis7192 wrote:Take the integral of 0. It's C. Now to get a constant means that 0 must exist because you can't just get something out of nothing.


You didn't get something out of nothing (and why on earth shouldn't you?). C is determined by the initial conditions. For all you know it's also zero.
by archgoon
Mon Jan 28, 2008 10:11 am UTC
Forum: Mathematics
Topic: Limits to prime distances
Replies: 15
Views: 2022

Re: Limits to prime distances

Mr President! We CANNOT allow this Prime Number GAP!
by archgoon
Fri Jan 25, 2008 4:25 am UTC
Forum: Science
Topic: Learning General Relativity
Replies: 9
Views: 1661

Re: Learning General Relativity

As the above poster said, you really don't need to know any of this to do general relativity. You can do problems with riemannian geometry without actually knowing what it is. This is the physicist way of doing things, and is why your instructor isn't worrying about any of this. However, I hate tha...
by archgoon
Wed Jan 23, 2008 5:37 am UTC
Forum: Individual XKCD Comic Threads
Topic: 0373: "The Data So Far"
Replies: 243
Views: 41621

Re: The Data So Far Discussion

SF17:

What is your definition of soul? It is a word that means a lot of things to people. What is your definition?

---
EDIT: Amended for clarity.
by archgoon
Wed Jan 23, 2008 5:29 am UTC
Forum: Individual XKCD Comic Threads
Topic: 0373: "The Data So Far"
Replies: 243
Views: 41621

Re: The Data So Far Discussion

jdogmoney:

How would you interpret the results of the gold foil experiment?
by archgoon
Mon Jan 07, 2008 9:28 am UTC
Forum: Individual XKCD Comic Threads
Topic: 0367: "Fandom"
Replies: 158
Views: 25165

Re: "Fandom" Discussion

Incidentally, Corusca gems are better off being used to construct lightsabers. You can use some worthless metal for currency instead. You know, using metal as currency in the star wars universe seems like a very bad idea, given the ready supply of fusion cutters and all sorts of nucleus-altering te...
by archgoon
Fri Dec 07, 2007 6:46 am UTC
Forum: Science
Topic: Physics Videos
Replies: 19
Views: 2804

Re: Physics Videos

Nemo42: I believe its because he's going back in time.
by archgoon
Fri Dec 07, 2007 3:57 am UTC
Forum: Science
Topic: Help me think up crazy hard SF technology ideas
Replies: 74
Views: 6534

Re: Help me think up crazy hard SF technology ideas

Is that (crazy hard) sf or crazy (hard sf)? Or both? Muons and Tauons with prolonged lifetimes (no idea how, some sort of geometry that causes destructive interference in the decay states I guess). Exotic atoms that stick around for extended periods of time. Exotic Carbon. Very good neutrino detecti...
by archgoon
Thu Dec 06, 2007 4:57 pm UTC
Forum: Mathematics
Topic: The Fine Structure Constant is Chaitin's Constant...
Replies: 8
Views: 1736

Re: The Fine Structure Constant is Chaitin's Constant...

>>That was a joke.
>>But if for some reason the number wasn't set randomly, it should have a mathematical definition.

What do you mean by 'random' and 'set' in this context?
by archgoon
Sat Nov 03, 2007 11:12 pm UTC
Forum: Mathematics
Topic: 2^x = x^3
Replies: 12
Views: 3153

Re: 2^x = x^3

>>Right, but if you use less well-known functions, it can be expressed concisely.

Not really, since it's less well known, you have to include the wikipedia link. And defining the function, in a way that is actually useful, requires the python code there.
by archgoon
Tue Oct 02, 2007 4:28 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 0323: "Ballmer Peak"
Replies: 116
Views: 55350

Re: "Ballmer Peak" Discussion

Moo wrote:Devil*hic*copters?

http://youtube.com/watch?v=KMU0tzLwhbE
by archgoon
Tue Oct 02, 2007 7:45 am UTC
Forum: Individual XKCD Comic Threads
Topic: 0323: "Ballmer Peak"
Replies: 116
Views: 55350

Re: "Ballmer Peak" Discussion

Ah, from the wikipedia link we can immediately see the cause of this effect, namely the slurred speech. Drinking alcohol causes you to lisp.
by archgoon
Tue Oct 02, 2007 7:42 am UTC
Forum: Individual XKCD Comic Threads
Topic: 0323: "Ballmer Peak"
Replies: 116
Views: 55350

Re: "Ballmer Peak" Discussion

repost
by archgoon
Tue Oct 02, 2007 7:37 am UTC
Forum: Individual XKCD Comic Threads
Topic: 0323: "Ballmer Peak"
Replies: 116
Views: 55350

Re: "Ballmer Peak" Discussion

Devel*hic*opers! Devel*hic*opers! Devel*hic*opers! Devel*hic*opers! Devel*hic*opers! Devel*hic*opers! Devel*hic*opers...
by archgoon
Sun Sep 16, 2007 7:36 pm UTC
Forum: Science
Topic: Weak Question
Replies: 4
Views: 1782

Ah, thanks antonfire and Korandder.
by archgoon
Fri Sep 14, 2007 4:46 am UTC
Forum: Science
Topic: LHC Dangerous?
Replies: 372
Views: 84909

This post's purpose has been accomplished more elegantly by a previous poster.
by archgoon
Fri Sep 14, 2007 4:28 am UTC
Forum: Science
Topic: Weak Question
Replies: 4
Views: 1782

Weak Question

Okay So according to wikipedia (22/11)Na -> (22/10) Ne + (e+) + v_e This is beta decay, and from my understanding is due to the weak force. According to wikipedia again, the W and Z bosons have masses that are 100 times that of a proton, or about 4-5 times that of a single radioactive sodium atom. H...
by archgoon
Thu Aug 30, 2007 5:02 pm UTC
Forum: Mathematics
Topic: IBP
Replies: 14
Views: 2436

Hey, I still use sohcahtoa when trying to get vector components.

Well, the sohcah part anyhow.
by archgoon
Mon Aug 06, 2007 8:26 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 0298: "Tesla Coil"
Replies: 99
Views: 36192

If the world operated by how people thought it worked, then objects released from a circular orbit would curve (rather than fly off tangentially) and cannonballs would fall directly to the ground after traveling in a straight line.

And ab would always equal ba.
by archgoon
Mon Jul 30, 2007 12:52 am UTC
Forum: Science
Topic: realtivity and conservation of energy
Replies: 37
Views: 4740

zenten wrote:Where is the field located?


Bit confused by this question. The field is, as one would expect, distributed throughout space. The field is _everywhere_.
by archgoon
Sun Jul 29, 2007 12:58 am UTC
Forum: Science
Topic: realtivity and conservation of energy
Replies: 37
Views: 4740

The potential energy is held in the field. The field has more energy when the rock is at the top of the mountain then at the base. It is the field, not the rock, that has more mass. If the rock is allowed to fall from the mountain in a (very long) evacuated tube, its mass will increase (in the earth...
by archgoon
Sun Jul 29, 2007 12:35 am UTC
Forum: Science
Topic: dumb EM question
Replies: 10
Views: 2581

I seem to recall having a prof point out that unlike the Electric Displacement Field D, H is more commonly used then B since it's what is usually directly controllable in a lab setting.
by archgoon
Sat Jul 28, 2007 10:46 pm UTC
Forum: Mathematics
Topic: Bases!
Replies: 9
Views: 2150

Okay, recall that if you have a vector space V, and two bases B1, and B2 for it, then there is a linear transformation (a matrix), S, between the two bases. You could even think of the two bases as representing two different spaces V1 and V2. So S takes a vector v1, represented in base b1, and then ...
by archgoon
Mon Jul 09, 2007 4:32 am UTC
Forum: Individual XKCD Comic Threads
Topic: 0287: "NP-Complete"
Replies: 191
Views: 35028

And if I had just gone straight to Mathematica and not wasted time trying to code a solution in python I could have tied with you Mouffles. :)

That or not have asked silly questions. :)
by archgoon
Mon Jul 09, 2007 4:10 am UTC
Forum: Individual XKCD Comic Threads
Topic: 0287: "NP-Complete"
Replies: 191
Views: 35028

Question, do we need to factor in the variable tip?

Also, it's only about 8^6 possibilities. Brute force it.
by archgoon
Wed Jun 27, 2007 6:37 am UTC
Forum: Science
Topic: relativity & standard model question
Replies: 7
Views: 2654

Well, I happen to know someone who knows the resolution to the quantum gravity problem. He refuses to publish, though, because he's from the future, and insists it would cause a serious paradox. :)
by archgoon
Wed Jun 27, 2007 5:48 am UTC
Forum: Science
Topic: F^{mu nu} and QED
Replies: 0
Views: 1910

F^{mu nu} and QED

So, anyhow, wikipedia says: http://upload.wikimedia.org/math/5/a/8/5a8d53cdea76adf3431cf0725b758f41.png So, is that F_{mu nu}F^{mu nu} term just the good ol fashioned Electromagnetic field tensor that we all know and love from classical E+M? Does this mean that I can plug in a given E field and B Fi...
by archgoon
Tue May 22, 2007 10:27 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 0265: "Choices: Part 2"
Replies: 54
Views: 15790

I think the comic needs to have a little disclaimer "Distances not drawn to scale."

That, or the people are talking _very_ fast.
by archgoon
Fri May 18, 2007 9:51 am UTC
Forum: Individual XKCD Comic Threads
Topic: 0263: "Certainty"
Replies: 149
Views: 51088

Alice*(Bob+Carol) != (Alice*Bob) + (Alice*Carol). That is, a threesome is not the same as a guy getting cheated on by some random chick in the street. In memory of Mr. Falwell, who proved that gay couples do not make a threesome. Or something. Something right. Wow. Okay, I'm thinking of giving you ...
by archgoon
Fri May 18, 2007 5:43 am UTC
Forum: Individual XKCD Comic Threads
Topic: 0263: "Certainty"
Replies: 149
Views: 51088

I DEMAND AN APOLOGY!
by archgoon
Fri May 18, 2007 5:41 am UTC
Forum: Individual XKCD Comic Threads
Topic: 0263: "Certainty"
Replies: 149
Views: 51088

Egg on my face! At least it was just the alt-text this time. YOUR TASK: Politicize the distributive property in 50 or fewer words! As I already pointed out <b>YOU</b> have clearly demonstrated the overwhelming bias in our society towards commutative algebras. I stand by tall and firm for the recogn...

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