## Search found 301 matches

- Sun Dec 23, 2007 2:15 pm UTC
- Forum: Serious Business
- Topic: The Potential Reformation of the United States of America
- Replies:
**81** - Views:
**8616**

### Re: The Potential Reformation of the United States of America

I'm going to put my money on the people winning if it started, but I expect the government would do enough to stop it happening by feeding misinformation etc.

- Sat Dec 22, 2007 8:09 pm UTC
- Forum: News & Articles
- Topic: Free MacDonalds!
- Replies:
**35** - Views:
**10657**

### Re: Free MacDonalds!

I could go out, right now, with five dollars and get enough food to keep myself nourished for a week. More if I shop at one of the various asian groceries around these parts, but that's a regional thing and not everyone has access. It won't be pleasant, and I'd *rather* be eating hamburgers and fri...

- Fri Dec 21, 2007 11:17 pm UTC
- Forum: Mathematics
- Topic: Kind of bored and want basic proof practice
- Replies:
**40** - Views:
**3831**

### Re: Kind of bored and want basic proof practice

btilly wrote: However for the major areas of mathematics we now have axioms that people are willing to live with, and so there is somewhat less call than there used to be to try to create those axioms.

- Fri Dec 21, 2007 9:46 am UTC
- Forum: General
- Topic: How would you want to die
- Replies:
**84** - Views:
**7323**

### Re: How would you want to die

I want to die for a cause.... Not sure what cause yet... I suppose being aborted would be quite cool (bit late for that though). Euthanasia. Thats the way I'd want to go, soon as I get too old to look after myself

- Sat Dec 15, 2007 4:53 pm UTC
- Forum: Mathematics
- Topic: How would you simplify this
- Replies:
**24** - Views:
**2251**

### Re: How would you simplify this

Aradae wrote:I had to mail it by today

Not the point, I'm sorry

- Sat Dec 15, 2007 4:44 pm UTC
- Forum: Mathematics
- Topic: How would you simplify this
- Replies:
**24** - Views:
**2251**

### Re: How would you simplify this

I suggest no one helps him until after the 17th

- Fri Dec 14, 2007 1:53 pm UTC
- Forum: Mathematics
- Topic: Favorite math jokes
- Replies:
**1452** - Views:
**489891**

### Re: Favorite math jokes

Nullcline wrote:I have never started a proof with "Let epsilon>0." (1/r >> epsilon)pkuky wrote:because EVERY. SINGLE. PROOF. IN ANALYSIS. STARTS. let epsilon>0.

Perhaps you haven't done analysis yet?

- Fri Dec 14, 2007 12:11 am UTC
- Forum: Mathematics
- Topic: Number Theory exam
- Replies:
**13** - Views:
**1791**

### Re: Number Theory exam

(p-1) divides (p-2)!. Since the prime factors of p-1 are all less than p-2 (since p-1 is even)

Its at times like this when I pray for TeX on the fora

Its at times like this when I pray for TeX on the fora

- Thu Dec 13, 2007 11:47 pm UTC
- Forum: Mathematics
- Topic: Number Theory exam
- Replies:
**13** - Views:
**1791**

### Re: Number Theory exam

Show that pk-1+pk-2+...+p1+1 Doesn't equal (p-2)! I made it to there. How? I haven't done it yet, but I would guess either mod bashing showing a smaller than or greater than inequality. Have you looked at Wilson's for this? EDIT: Probably talking jibberish here, but could be work on induction on th...

- Thu Dec 13, 2007 11:25 pm UTC
- Forum: Mathematics
- Topic: Number Theory exam
- Replies:
**13** - Views:
**1791**

### Re: Number Theory exam

Well that was late now wasn't it. I had this question on there, I couldn't finish. Show that for p-prime>5 P k doesn't equals (p-1)! + 1. For k-natural. Factorise p k -1 Show that p k-1 +p k-2 +...+p 1 +1 Doesn't equal (p-2)! EDIT: Double Post assuming there are limits on the children being of real...

- Thu Dec 13, 2007 6:09 pm UTC
- Forum: Mathematics
- Topic: is this a game or an un-game
- Replies:
**23** - Views:
**2283**

### Re: is this a game or an un-game

Whoa... serious deja-vu

- Wed Dec 12, 2007 10:59 pm UTC
- Forum: Mathematics
- Topic: Geometry - Inversion
- Replies:
**1** - Views:
**794**

### Geometry - Inversion

Does anyone have any decent resources on inversion? I have read quite a bit on a variety of different sites but none of them have any "exercises" if you like. I mean, I get the idea, you have a circle and you mirror everything in it. However, how does this help us solve problems? Thanks Si...

- Sun Dec 09, 2007 4:18 pm UTC
- Forum: Mathematics
- Topic: tricky sums, i need help
- Replies:
**15** - Views:
**1909**

### Re: tricky sums, i need help

I'm not sure whether this is what you want, but its a useful trick for remembering them anyway. Say you want to find the sum of the first n powers of 4. We assume there exists a polynomial degree 5 which matches this sum. Hence an 5 +bn 4 +cn 3 +dn 2 +en+f We calculate the first few values to discov...

- Sat Dec 08, 2007 5:06 pm UTC
- Forum: Mathematics
- Topic: What symbol do you use (in proofs) for contradiction?
- Replies:
**11** - Views:
**15410**

### Re: What symbol do you use (in proofs) for contradiction?

I find it easier to see whats going on when a few words are used. Hence I use the word "contradiction"

- Sat Dec 08, 2007 11:08 am UTC
- Forum: Logic Puzzles
- Topic: Nice Maths Puzzle
- Replies:
**7** - Views:
**2392**

### Re: Nice Maths Puzzle

fordred wrote:That's the answer I got

I also solved question 2, but spent to much time on question 3, and ended up doing it completely wrong.

Ah... Geometry, questions 4 and 6 were so good as well....

- Mon Dec 03, 2007 10:24 pm UTC
- Forum: Mathematics
- Topic: Favorite math jokes
- Replies:
**1452** - Views:
**489891**

### Re: Favorite math jokes

Diemo wrote:What's the deal with E<0?

Lots of delta-epsilon proofs start with "Let e>0..."

Damn, too slow

- Mon Dec 03, 2007 10:23 pm UTC
- Forum: Mathematics
- Topic: How do you end your proofs? QED, box, ...
- Replies:
**107** - Views:
**21569**

### Re: How do you end your proofs? QED, box, ...

If only I knew some patois... Still

- Mon Dec 03, 2007 11:58 am UTC
- Forum: Logic Puzzles
- Topic: The Answering Machine [solution thread]
- Replies:
**32** - Views:
**4939**

### Re: The Answering Machine [solution thread]

Everyvbody here is assuming that the machine just has to answer the question, not answer it correctly. It would be far cooler if the machine had to answer, and correctly. Then, you could control the entire universe. Example: Is the answer to this question the same as the answer to the question, &qu...

- Sun Dec 02, 2007 5:49 pm UTC
- Forum: Mathematics
- Topic: Calculus Final Exam; Applied Calc
- Replies:
**21** - Views:
**3146**

### Re: Calculus Final Exam; Applied Calc

Design a can for a Can of Coke, minimize the amount of metal used (or price of said metal)

- Sun Dec 02, 2007 3:30 pm UTC
- Forum: Logic Puzzles
- Topic: The Answering Machine [solution thread]
- Replies:
**32** - Views:
**4939**

### Re: The Answering Machine [solution thread]

Slightly less of the paradoxical-ness of it. You could walk in with explosives, ask whether it will blow up in a minute. If it says "No", blow it up, if it says "Yes", let it blow itself up. Either way the outcome is that it blows up. Hence it should say "Yes" and blow ...

- Sun Dec 02, 2007 3:02 pm UTC
- Forum: General
- Topic: On kids, and beating the living shit out of them
- Replies:
**62** - Views:
**6114**

### Re: On kids, and beating the living shit out of them

Kids do dumb shit. ALL kids do dumb shit. Can anyone here look back and say that they didn't do something that they regret? Hopefully hitting the engineer will be the wake up call that they need to make them realise that their actions have consequences and that it really was a dumb thing to do. So ...

- Sun Dec 02, 2007 2:57 pm UTC
- Forum: News & Articles
- Topic: The Sudan Teacher, "Muhammed the Teddy Bear" Controversy
- Replies:
**73** - Views:
**6336**

### Re: The Sudan Teacher, "Muhammed the Teddy Bear" Controversy

I don't know enough about the Islamic religion to comment here really. However, if it is considered offensive by them, then it seems a fairly silly thing to do. I mean, personally I don't see a problem with it, but if it is a sensitive issue in the country, the chances are it is a good idea to avoid...

- Sun Dec 02, 2007 1:52 pm UTC
- Forum: Logic Puzzles
- Topic: Nice Maths Puzzle
- Replies:
**7** - Views:
**2392**

### Re: Nice Maths Puzzle

Macbi wrote:Was it strong induction?

I tried, but couldn't get the odd numbers to work.

It was in indeed. MSN?

- Sun Dec 02, 2007 9:35 am UTC
- Forum: Mathematics
- Topic: Insanely easy question, sorry, just verifying answer
- Replies:
**12** - Views:
**3245**

### Re: Insanely easy question, sorry, just verifying answer

i think the answer is A Chance of blue parakeet = 10% = .1 Chance of non-blue parakeet = 90% = .9 You know you need one blue, and one non-blue, which gives you .1*.9*.9=.081 or 8.1%, which is one of the answers Well, obviously the chance is going to be >0.1 so you must be right Why is that? I disag...

- Sun Dec 02, 2007 9:25 am UTC
- Forum: Mathematics
- Topic: Insanely easy question, sorry, just verifying answer
- Replies:
**12** - Views:
**3245**

### Re: Insanely easy question, sorry, just verifying answer

Well, obviously the chance is going to be >0.1 so you must be right

- Sun Dec 02, 2007 12:34 am UTC
- Forum: Mathematics
- Topic: William Lowell Putnam Competition
- Replies:
**73** - Views:
**9013**

### Re: William Lowell Putnam Competition

So, if we took the test are we allowed to talk about it? I'm a freshmen and was pretty over my head, but I think I got a couple answers. Though I would love to find out what exactly we were supposed to do for the (3k+1) sum problem... but, again, maybe we aren't supposed to talk about it... I don't...

- Sat Dec 01, 2007 10:21 pm UTC
- Forum: Logic Puzzles
- Topic: Nice Maths Puzzle
- Replies:
**7** - Views:
**2392**

### Re: Nice Maths Puzzle

Macbi wrote:BMO question one!

(I also got 2,3 and 4. questions 5 and 6 didn't look possible though)

My working went:

Question 6 was easy enough. I found the two geometry questions a bitch. I also messed up question 2, but hopefully I'll still get in the 0+ for that anyway

- Fri Nov 30, 2007 10:44 pm UTC
- Forum: Mathematics
- Topic: Amusing answers to tests
- Replies:
**393** - Views:
**60899**

### Re: What proofs are (split from amusing test answers)

Not so much amusing, but on my BMO today, I was so tired by the end I wrote

"Lemming 1"

and for one question, which was clearly complicated.. "this is trivial"

"Lemming 1"

and for one question, which was clearly complicated.. "this is trivial"

- Fri Nov 30, 2007 4:30 pm UTC
- Forum: Logic Puzzles
- Topic: Help me stop a alien invasion.
- Replies:
**57** - Views:
**11140**

### Re: Help me stop a alien invasion.

To be honest, our best chance of survival would be submission. If they are attacking in swarms and we are reduced to hiding, we're fairly screwed anyway

- Fri Nov 30, 2007 3:47 pm UTC
- Forum: General
- Topic: Altruism and compensation
- Replies:
**10** - Views:
**1626**

### Re: Altruism and compensation

I agree that it cheapens it, but if it gets a few more people doing good things, there can't be that much of a problem

- Wed Nov 28, 2007 10:35 pm UTC
- Forum: General
- Topic: Merging trend?
- Replies:
**12** - Views:
**1580**

### Re: Merging trend?

I personally have noticed this trend, although I do not believe that it can continue sustainably for ever. I mean, there is only so much stuff that one could want together. I mean, I love having an iPod, phone and camera separate, why would I want a poor quality camera and mp3 player rolled into a p...

- Wed Nov 28, 2007 10:29 pm UTC
- Forum: Serious Business
- Topic: Value of a life
- Replies:
**91** - Views:
**6420**

### Re: Value of a life

I'm kind of a cold, and logical bastard in some ways, so I would say that I'm much more likely to pay for someone who is actually contributing back to society. You're asking to judge worth of a person based on something, so that is how I would do it. For example, the person working on renewable ene...

- Tue Nov 27, 2007 7:22 pm UTC
- Forum: Mathematics
- Topic: Favourite Field of Math?
- Replies:
**60** - Views:
**5407**

### Re: Favourite Field of Math?

Too much work? Number theory can have just as much or more work in it if you delve deep enough I think it's bias from high school. Yes, number theory is complex. But it doesn't seem like work; I enjoy playing around with it. Fortunately, I have reached that level with all maths (except Geometry dam...

- Tue Nov 27, 2007 6:38 pm UTC
- Forum: Mathematics
- Topic: Favourite Field of Math?
- Replies:
**60** - Views:
**5407**

### Re: Favourite Field of Math?

Number theory, because other fields within mathematics seem to me like too much work. Though, this may change in the future because the more I look into one branch of mathematics, the more I find myself needing to dabble in all the others to understand. Too much work? Number theory can have just as...

- Tue Nov 27, 2007 6:14 pm UTC
- Forum: Mathematics
- Topic: Favourite Field of Math?
- Replies:
**60** - Views:
**5407**

### Re: Favourite Field of Math?

Currently, I am saying number theory. This it because it is a vastly interesting topic which is accessible to people who haven't had that much exposure to advanced mathematics.

- Mon Nov 26, 2007 12:13 pm UTC
- Forum: The Help Desk
- Topic: TI-89 OS Upgrade
- Replies:
**2** - Views:
**5943**

### Re: TI-89 OS Upgrade

Is this occurring in a Windows environment, or is it in a *nix environment (Yes, *nix includes OS X)? I have access to both Windows, Mac and Ubuntu. I have tried on the windows and mac computers and both failed I know that the software used to transfer files between the TI-89 and anything is rather...

- Sun Nov 25, 2007 3:23 pm UTC
- Forum: Mathematics
- Topic: Properties of the a Cubic Equation
- Replies:
**4** - Views:
**4664**

### Re: Properties of the a Cubic Equation

Macbi wrote:Start with (x-a)(x-b)(x-c)=0 and multiply out.

We get x^{3}-(a+b+c)x^{2}+(ab+bc+ca)x-(a+b+c)=0

The rest follows.

Seems so obvious now

- Sun Nov 25, 2007 3:10 pm UTC
- Forum: Mathematics
- Topic: Properties of the a Cubic Equation
- Replies:
**4** - Views:
**4664**

### Properties of the a Cubic Equation

I was reading a worked solution to an equation regarding the roots of a cubic equation, and it stated Since a, b and c are the roots of the equation x 3 − 6x 2 + 5x −1 = 0 , then using the properties of the coefficients of a cubic equation, s = a + b + c = 6 t = ab + ac + bc = 5 p = abc =1 Explanati...

- Sat Nov 24, 2007 2:46 pm UTC
- Forum: The Help Desk
- Topic: TI-89 OS Upgrade
- Replies:
**2** - Views:
**5943**

### TI-89 OS Upgrade

Hi, I'm trying link my TI-89 to my computer in order to send files across, but I keep getting a variety of different errors depending on what I try. The strangest thing is that I can still get the Screenshot program to work So... what I have done so far Installed TI Connect Plugged in USB and other ...

- Sat Nov 24, 2007 7:48 am UTC
- Forum: Mathematics
- Topic: Multiplying pi to get whole numbers
- Replies:
**41** - Views:
**13973**

### Re: Multiplying pi to get whole numbers

Given floating point roundoff, it doesn't have to be that good an approximation. I just have no idea how many digits Google or my calculator actually hold. I figured Google would hold enough to not have to round... ... this is a joke, right? In what way? I figured that if an approximation such as t...