## Search found 671 matches

- Sat May 19, 2012 10:05 am UTC
- Forum: Mathematics
- Topic: After calculus
- Replies:
**20** - Views:
**4777**

### Re: After calculus

If you are into more theoretical stuff, pick up a book on group theory or representation theory.

- Wed May 02, 2012 8:53 am UTC
- Forum: Mathematics
- Topic: Pollock octahedral numbers conjecture.
- Replies:
**4** - Views:
**2791**

### Re: Pollock octahedral numbers conjecture.

Ripped this from wikipedia. wondering if anyone here would be able to prove or disprove it. It's been unproven for 162 years. I'm going to go out on a limb here and guess that no one's going to prove or disprove it in a forum thread. Actually, this problem looks quite approachable. Using the circle...

- Sun Apr 15, 2012 11:05 pm UTC
- Forum: News & Articles
- Topic: SS refuses to pay prostitute, "scandal"
- Replies:
**47** - Views:
**9505**

### Re: SS refuses to pay prostitute, "scandal"

How does "Servicegate" sound?sourmìlk wrote:But because it's called a scandal, it needs a name. What word should we suffix with -gate?

- Wed Apr 04, 2012 5:32 am UTC
- Forum: Books
- Topic: Harry Potter and the Methods of Rationality
- Replies:
**1036** - Views:
**413989**

### Re: Harry Potter and the Methods of Rationality

Well, it's not settled for me yet I'm afraid. EDIT: Damn, I got pipped at the post. Should have typed faster. :p First of all, Dumbledore didn't actually admit to burning Cissy at all. He admitted to knowing that people thought that was what happened, but he also pointed out that it didn't ...

- Wed Mar 28, 2012 2:07 am UTC
- Forum: Mathematics
- Topic: Theoretical Linear Algebra Question
- Replies:
**3** - Views:
**958**

### Re: Theoretical Linear Algebra Question

Two dimensions is misleading - try three (or more) dimensions.

- Tue Mar 27, 2012 9:44 pm UTC
- Forum: Mathematics
- Topic: Finding the probability of a probability being at least 0.75
- Replies:
**12** - Views:
**2943**

### Re: Finding the probability of a probability being at least

>> The problem is that the prior is chosen arbitrarly. Arbitrarily, but not random. For example, you could use the distribution of Elo-numbers in the population to estimate the distribution of X. If you know anything about Chris, you could update this prior to get a better one. So, I assume we are ...

- Fri Mar 23, 2012 6:19 am UTC
- Forum: Books
- Topic: Harry Potter and the Methods of Rationality
- Replies:
**1036** - Views:
**413989**

### Re: Harry Potter and the Methods of Rationality

Whatever he does do, I'm going to be awfully disappointed if he doesn't

**Spoiler:**

- Thu Mar 22, 2012 1:15 am UTC
- Forum: General
- Topic: What themes dominate the bulk of your dreams?
- Replies:
**79** - Views:
**17050**

### Re: What themes dominate the bulk of your dreams?

The things I have dreamt about in the dreams I remember (I assume the dreams I don't remember are all boring): flying, immortality and true love, accidentally destroying the universe just as I wake up, time travel, vast conspiracies involving Shakespeare, dreams within dreams, a family member dying,...

- Sun Mar 11, 2012 10:33 pm UTC
- Forum: Religious Wars
- Topic: Chess vs. Go Which is the better board game.
- Replies:
**55** - Views:
**29725**

### Re: Chess vs. Go Which is the better board game.

Chess also has a handicap system. usually it's done by removing one of the rooks of the better player from the board (or even the queen) Yeah, but that's a terrible handicap system. It changes the character of the game entirely. A better handicap is that the weaker player gets more time on his cloc...

- Sat Mar 03, 2012 9:21 am UTC
- Forum: Mathematics
- Topic: Quick question on basic calculus.
- Replies:
**50** - Views:
**6896**

### Re: Quick question on basic calculus.

So, I've been studying calculus at high school and there's this problem that bothers me. For instance ∫x 2 *2x dx=∫x 2 *(x 2 )' dx=x 2 Can't I write that as ∫x 2 d(x 2 )? I'm basing my idea on the fact that (x 2 )' can also be written as d(x 2 ) /dx , although in my country teachers never use that ...

- Thu Mar 01, 2012 6:42 am UTC
- Forum: Books
- Topic: I'd like to know the name of this book/short story/comic
- Replies:
**666** - Views:
**271102**

### Re: I'd like to know the name of this book/short story/comic

I read this book about 5 years ago but I believe it was old at the time. Book is about the life of a time traveler who learns that his race specifically time travels and destroys or limits technological abilities of other species to ensure nobody can ever challenge them. He goes about ending this p...

- Wed Feb 22, 2012 9:04 am UTC
- Forum: Computer Science
- Topic: Proving Correctness of Algorithm using Hoare
- Replies:
**5** - Views:
**2743**

### Re: Proving Correctness of Algorithm using Hoare

How about Edmond's matching algorithm?

- Wed Feb 15, 2012 4:42 am UTC
- Forum: Religious Wars
- Topic: Chess vs. Go Which is the better board game.
- Replies:
**55** - Views:
**29725**

### Re: Chess vs. Go Which is the better board game.

I just set up an account (notzeb) on FICS. What's your handle? What time do you play?anishgiri wrote:notzeb wrote:There is only one way to settle this - I challenge you to a game of chess.

Call where do you play? I play in FICS.

- Fri Feb 10, 2012 4:52 am UTC
- Forum: Religious Wars
- Topic: Chess vs. Go Which is the better board game.
- Replies:
**55** - Views:
**29725**

### Re: Chess vs. Go Which is the better board game.

There is only one way to settle this - I challenge you to a game of chess.anishgiri wrote:notzeb wrote:This reminds me of a story about a certain frog who lived in a well...

This post reminds me of a boy, who does not have a clue(or idea) of something he read.

- Thu Feb 09, 2012 3:19 am UTC
- Forum: Religious Wars
- Topic: Chess vs. Go Which is the better board game.
- Replies:
**55** - Views:
**29725**

### Re: Chess vs. Go Which is the better board game.

I do think chess is a better game. I like the elegance and art of a chess battle(how you form plans etc). For those who are not familiar there are many chess concepts like prophylaxis, opposition rule, minority attack, weak square, weak pawns, bad bishop, exchange sacrifice hanging pawns etc. I lik...

- Wed Feb 01, 2012 12:15 am UTC
- Forum: Mathematics
- Topic: Normal Subgroups of the Free Group
- Replies:
**4** - Views:
**3411**

### Re: Normal Subgroups of the Free Group

Ok, here's another example. Map the free group to S_3 by mapping a and b to different transpositions. The kernel is the smallest normal subgroup containing a^2, b^2, and (ab)^3. A generating set of the kernel is contained in {a^2, b^2, (ab)^3, ba^2b, ab^2a, (ba)^3, (bab)^2, (aba)^2, (ab)^2(ba)^2, (b...

- Tue Jan 31, 2012 10:50 pm UTC
- Forum: Mathematics
- Topic: Normal Subgroups of the Free Group
- Replies:
**4** - Views:
**3411**

### Re: Normal Subgroups of the Free Group

The set of all words with even length is a normal subgroup of index two... if the generators of your free group are a, b, then this subgroup is generated by a^2, b^2, and ab. More generally, pick any finite group, map the free group into it any way you like, and take the kernel of that map. That ker...

- Fri Jan 06, 2012 10:13 pm UTC
- Forum: General
- Topic: Important question: polar bears, or tanks?
- Replies:
**32** - Views:
**4507**

### Re: Important question: polar bears, or tanks?

Unfortunately, no.

- Fri Jan 06, 2012 9:11 am UTC
- Forum: General
- Topic: Important question: polar bears, or tanks?
- Replies:
**32** - Views:
**4507**

### Important question: polar bears, or tanks?

Who would win?

To make the question more precise, imagine the polar bear and the tank (or maybe there are more than one of each?) start out pretty far away from each other, the tank pointing at the polar bear, the polar bear aware of the tank, and for some reason they are pissed at each other.

To make the question more precise, imagine the polar bear and the tank (or maybe there are more than one of each?) start out pretty far away from each other, the tank pointing at the polar bear, the polar bear aware of the tank, and for some reason they are pissed at each other.

- Tue Dec 27, 2011 2:30 am UTC
- Forum: Books
- Topic: I'd like to know the name of this book/short story/comic
- Replies:
**666** - Views:
**271102**

### Re: I'd like to know the name of this book/short story/comic

Nope...Kewangji wrote:notzeb wrote:stuff

H.C. Andersen, maybe?

Someone was finally able to identify this for me irl: it was Saki.

- Sat Dec 24, 2011 9:24 am UTC
- Forum: Books
- Topic: I'd like to know the name of this book/short story/comic
- Replies:
**666** - Views:
**271102**

### Re: I'd like to know the name of this book/short story/comic

Hmm, I've got one. It was this collection of vignettes all by the same author (my memory keeps insisting that the author had a three letter name, something like Lum?), that I found in my grandmother's house while I was in middle school. There was no supernatural or fantastical element, and none of t...

- Wed Dec 21, 2011 6:13 am UTC
- Forum: Mathematics
- Topic: How come there is no such thing as 1 dimensional geometry?
- Replies:
**14** - Views:
**3780**

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

Over the complex numbers, if you throw in the point at infinity, 1-dimensional geometry becomes inversive geometry, the geometry of circles and lines. If you just look at the real line, I guess you could probably still have fun looking at cross ratios and stuff. For instance, how many quadruples of ...

- Thu Dec 15, 2011 2:38 am UTC
- Forum: Mathematics
- Topic: extracurricular maths for 2nd year undergrad
- Replies:
**4** - Views:
**1280**

### Re: extracurricular maths for 2nd year undergrad

If you like analysis, how about proving some results about which functions have integrals that are elementary functions? Maybe you could get into a little bit of differential galois theory.

- Wed Nov 23, 2011 7:48 pm UTC
- Forum: Mathematics
- Topic: Requesting Inequalities and Tips to Solving Them
- Replies:
**9** - Views:
**2541**

### Re: Requesting Inequalities and Tips to Solving Them

For entry level inequalities, the most important things to learn are probably the Cauchy-Schwarz inequality and the AM-GM inequality. The key to many inequalities is turning them into the "trivial inequality": no square is negative. Example: (x-y)^2 is a square, so it's at least zero. Expa...

- Fri Nov 18, 2011 10:23 pm UTC
- Forum: Language/Linguistics
- Topic: Understanding Chinese?
- Replies:
**9** - Views:
**4341**

### Re: Understanding Chinese?

I can't understand the lyrics of many songs in English (my native language) without listening to them over and over and over. And even then, sometimes I still need someone to point out that I've misheard them all along.

- Fri Nov 04, 2011 6:29 am UTC
- Forum: Logic Puzzles
- Topic: How much money?
- Replies:
**13** - Views:
**3404**

### Re: How much money?

I pick x = 1000, because my utility curve starts flattening out around a million dollars.

- Thu Nov 03, 2011 3:19 am UTC
- Forum: Logic Puzzles
- Topic: x^x^x^x^x=5?
- Replies:
**30** - Views:
**12602**

- Thu Oct 27, 2011 8:03 am UTC
- Forum: Mathematics
- Topic: What do you think the most underrated area of math is?
- Replies:
**13** - Views:
**4050**

### Re: What do you think the most underrated area of math is?

Some contenders:

- The Umbral Calculus

- Tauberian Theorems

- Arakelov Theory

- Fewnomial Theory

- Functional Equations

- Tropical Geometry

- Sieve Theory

- Sturmian Words

- Dessins d'enfants

- Bubbles

- The Umbral Calculus

- Tauberian Theorems

- Arakelov Theory

- Fewnomial Theory

- Functional Equations

- Tropical Geometry

- Sieve Theory

- Sturmian Words

- Dessins d'enfants

- Bubbles

- Wed Sep 14, 2011 7:32 am UTC
- Forum: General
- Topic: Hypothetically would you fight god to save your soulmate?
- Replies:
**92** - Views:
**13178**

### Re: Hypothetically would you fight god to save your soulmate

I would pull out the bible in front of god and state: "If I am permitted anything I want in Heaven than I would like my soulmate back, and if you refuse, than this is a breach of contract and I want my life back. "What contract? You think that a poor translation of the written record of s...

- Tue Sep 13, 2011 9:46 am UTC
- Forum: Gaming
- Topic: GO weiqi igo baduk
- Replies:
**154** - Views:
**62355**

### Re: GO....

Yes That's great. And no offence, but can I get a second opinion? Second opinion: no, white won't capture all of the black stones. He/she will, instead, take all of the black stones on the left hand side of the board. (The black stones in the upper right hand corner are clearly unkillable, assuming...

- Tue Sep 13, 2011 7:44 am UTC
- Forum: General
- Topic: Hypothetically would you fight god to save your soulmate?
- Replies:
**92** - Views:
**13178**

### Re: Hypothetically would you fight god to save your soulmate

Lets say a scenario of any kind of events that follow christian law for evil are commited by your soulmate and she/he is sent to punishment, would you fight against God to save her soul from hell? Assuming a Christian god, I'd probably fight to save my soulmate from heaven as well. We've got better...

- Sun Aug 21, 2011 12:26 pm UTC
- Forum: Logic Puzzles
- Topic: Looking for hard and rare logic puzzles
- Replies:
**60** - Views:
**20753**

### Re: Looking for hard and rare logic puzzles

This thread reminds me of this.

This puzzle and this one are both classics as well (I like to give the second one along with the challenge of finding a way to trick the devil despite apparently being in a losing position).

This puzzle and this one are both classics as well (I like to give the second one along with the challenge of finding a way to trick the devil despite apparently being in a losing position).

- Tue Jun 21, 2011 1:14 am UTC
- Forum: Mathematics
- Topic: Interesting Problems?
- Replies:
**33** - Views:
**4766**

### Re: Interesting Problems?

There is the Diophantine Equation: y^3 = x^2 + 2, which has only one solution, and that solution is easy enough to find. The interesting bit is that the proof that this is the only solution is quite tricky(I do not know the proof and am attempting to find it at present, so I do not wish to spoil it...

- Sat Jun 11, 2011 11:46 pm UTC
- Forum: Mathematics
- Topic: Function fields and local parameters
- Replies:
**3** - Views:
**1236**

### Re: Function fields and local parameters

I'm currently writing my bachelor thesis on the topic of projective curves and function fields, with a focus on the theorem of Riemann-Roch. Although I've been reading an abundance of books on the topic there's still two questions I have right now that I haven't found a satisfying answer to. First ...

- Sat Jun 11, 2011 9:50 pm UTC
- Forum: General
- Topic: Anyone else think blackmail should be legal?
- Replies:
**115** - Views:
**16504**

### Re: Anyone else think blackmail should be legal?

http://en.wikipedia.org/wiki/Blackmail http://www.walterblock.com/wp-content/uploads/publications/block_blackmail-as-a-victimless-crime-1999.pdf http://www.walterblock.com/wp-content/uploads/publications/block_blackmailing-for-mutual-good-reply-to-hardin-2000.pdf I was always thought blackmail bein...

- Sat Jun 04, 2011 5:38 am UTC
- Forum: Mathematics
- Topic: Collatz conjecture solved?
- Replies:
**2** - Views:
**2306**

### Re: Collatz conjecture solved?

I just skimmed over the paper. Near as I can tell, what happened is that Berg and Meinardus found a pair of functional equations that encoded the Collatz problem, and the author of this paper is just unraveling the equivalence between the pair of functional equations and the Collatz conjecture, then...

- Fri Jun 03, 2011 5:52 am UTC
- Forum: Fictional Science
- Topic: How would you make a properly mathy magic system?
- Replies:
**25** - Views:
**7059**

### Re: How would you make a properly mathy magic system?

Which has me wondering, how could you design a properly magical system, where casting is mathematical? The correct answer is Category Theory. Drawing the right diagrams can have drastic consequences. I once saw a master mathematician chase through the all of the arrows in a spectral sequence; the n...

- Wed Apr 06, 2011 5:10 pm UTC
- Forum: Mathematics
- Topic: Theorem being undecidable question
- Replies:
**8** - Views:
**1276**

### Re: Theorem being undecidable question

I've got a background in abstract algebra, but I went many years without it...now I"m back in college and reading some popular math texts. Anyhow, I recently encountered in a math book that said that in standard set theory with the axiom of choice included (ZFC), the Continuum Hypothesis (CH) ...

- Thu Mar 17, 2011 5:52 pm UTC
- Forum: Mathematics
- Topic: The Tau Manifesto
- Replies:
**165** - Views:
**44775**

### Re: The Tau Manifesto

You know, for some reason I saw the thread title and I was certain it would be about how much muons suck.

Hey, while we're changing mathematical conventions, can we get rid of that annoying off by one problem in the Gamma function by switching to the Pi function? This way Pi still gets some love.

Hey, while we're changing mathematical conventions, can we get rid of that annoying off by one problem in the Gamma function by switching to the Pi function? This way Pi still gets some love.

- Thu Dec 02, 2010 8:28 pm UTC
- Forum: Serious Business
- Topic: A different voting system... Juror-style voters
- Replies:
**48** - Views:
**5974**

### Re: A different voting system... Juror-style voters

I see one big problem with this voting system: lack of anonymity.

The mafia party doesn't win the vote unanimously? All 5000 randomly selected voters mysteriously end up dead.

The mafia party doesn't win the vote unanimously? All 5000 randomly selected voters mysteriously end up dead.