## Search found 62 matches

- Tue Nov 13, 2012 3:13 am UTC
- Forum: Mathematics
- Topic: Geometrics
- Replies:
**2** - Views:
**893**

### Re: Geometrics

Geogebra will allow you to draw shapes and also define them algebraically. You can also define quantities based on position and length, create sliders to parameterize your shapes and animate the shapes.

- Fri Mar 16, 2012 7:55 am UTC
- Forum: Individual XKCD Comic Threads
- Topic: 1030: "Keyed"
- Replies:
**108** - Views:
**29994**

### Re: 1030: "Keyed"

Hell hath no fury like a woman sconed.

- Mon Nov 14, 2011 12:11 pm UTC
- Forum: Mathematics
- Topic: A small puzzle.
- Replies:
**14** - Views:
**3136**

### Re: A small puzzle.

How is the order of reproduction determined? It looks like it's radiating outward from the center, but I'm having trouble figuring out the preferences. For instance, in generations 2 and 3, the topmost cell reproduces to North and West, while in generation 4 the topmost cell reproduces to North and ...

- Sun Apr 10, 2011 2:30 am UTC
- Forum: Mathematics
- Topic: Complex integration
- Replies:
**6** - Views:
**1311**

### Re: Complex integration

Ah, yes. I suppose I should have clarified my motivation behind this, and hence the limits of integration. I was originally trying to find the volume of an n-dimensional sphere and the result I got involved a product of integrals of powers of sine with limits of 0 to \pi . I was thinking that I'd ha...

- Sat Apr 09, 2011 9:30 pm UTC
- Forum: Mathematics
- Topic: Complex integration
- Replies:
**6** - Views:
**1311**

### Re: Complex integration

I was following the approach outlined in Brown and Churchill (2004, Sec 78) for computing the definite integral of functions of trigonometric functions, namely: For an integral of the type \int_0^{2\pi}F(\sin\theta, \cos\theta)\mathrm{d}\theta we can consider the integral a contour integral ...

- Sat Apr 09, 2011 3:35 pm UTC
- Forum: Mathematics
- Topic: Complex integration
- Replies:
**6** - Views:
**1311**

### Complex integration

While manually computing \int_0^{2\pi}sin^{2n+1}\theta\mathrm{d}\theta I was able to convert it to an integral proportional to \int_C \frac{(z-1)^{2n+1}}{z^{n+\frac{3}{2}}}\mathrm{d}z Since the denominator involves a rational power of z, I don't think there are any poles at z = 0, so I could...

- Sun Oct 25, 2009 5:34 am UTC
- Forum: Computer Science
- Topic: Need a friend?
- Replies:
**34** - Views:
**7177**

### Re: Need a friend?

I asked it if it could speak German (in German), it said yes, then it started conversing in German with me. I don't understand what it's saying though. Neun. Nicht. Huh.. Me: Ich bin verrückt. Cleverbot: Ich bin ein berliner. :D EDIT: Cleverbot: Ok but don't you remember me? It's dora. Me: Who's Do...

- Thu Aug 20, 2009 10:03 am UTC
- Forum: General
- Topic: I'm not slacking, my /x/ is /y/ing
- Replies:
**52** - Views:
**4654**

### Re: I'm not slacking, my /x/ is /y/ing

I'm not Slacking, my Subgenius is hiding.

- Sun Aug 02, 2009 4:31 pm UTC
- Forum: General
- Topic: "I don't want MY tax dollars to..."
- Replies:
**36** - Views:
**3204**

### Re: "I don't want MY tax dollars to..."

I think you're assuming that the government always does what is in the public's best interest and that the government does its job efficiently. Seeing as how we are in a financial crisis that was caused to a large extent by the government's lack of appropriate regulation, I would say that the previo...

- Sun Jul 19, 2009 1:52 am UTC
- Forum: General
- Topic: Uninstantiated clichés?
- Replies:
**10** - Views:
**1621**

### Re: Uninstantiated clichés?

I think Once Bitten may fit the bill, but I've not seen it.

- Wed Jul 15, 2009 9:22 pm UTC
- Forum: General
- Topic: Wow. Guys, this is why we have spambot protection.
- Replies:
**17** - Views:
**30759**

### Re: Wow. Guys, this is why we have spambot protection.

Reminds me of Usenet.

- Thu Jul 02, 2009 10:16 am UTC
- Forum: Mathematics
- Topic: chaos grapher
- Replies:
**9** - Views:
**1772**

### Re: chaos grapher

If nothing else, you could use a home grown program to create the data sets and something like gnuplot to graph it after the fact.

- Wed Jun 24, 2009 12:29 am UTC
- Forum: Food
- Topic: Random Recipe Generator
- Replies:
**69** - Views:
**12148**

### Re: Random Recipe Generator

Tabasco Sauce A La Cous Cous Serves 5 You will need: * 130ml tabasco sauce * 2 apples * 40ml lemonade * 50g cous cous Instructions: 1. pre-heat the oven to 190 C 2. stir-fry the tabasco sauce 3. lightly fry the tabasco sauce 4. saute the tabasco sauce 5. heat the tabasco sauce 6. flip the tabasco sa...

- Thu Jun 18, 2009 11:16 pm UTC
- Forum: Mathematics
- Topic: Nominal annual rate confusion
- Replies:
**0** - Views:
**431**

### Nominal annual rate confusion

I've been reviewing study materials for the FM/2 Actuary exam and I came across this problem: Bruce deposits 100 into a bank account. His account is credited interest at a nominal rate of interest of 4% convertible semiannually. At the same time, Peter deposits 100 into a separate account. Peter’s a...

- Mon Jun 08, 2009 11:09 am UTC
- Forum: General
- Topic: The most popular word on internet is...
- Replies:
**15** - Views:
**1839**

### Re: The most popular word on internet is...

help 3.28 billion

news 3.21 billion

love 1.73 billion

hate 200 million

news 3.21 billion

love 1.73 billion

hate 200 million

- Fri May 22, 2009 10:33 am UTC
- Forum: Mathematics
- Topic: I...um...What is this spiral?
- Replies:
**14** - Views:
**3567**

### Re: I...um...What is this spiral?

They look like Clothoids to me. Given that you have sin(i^2) and cos(i^2) terms further cements the point. What you're doing in your move() subroutine is called Euler's Method , a technique for numerical integration. In this case, y'(t)=8*sin(t*t), x'(t)=8*cos(t*t) and h = 0.5. Clothoids are interes...

- Thu May 21, 2009 2:04 am UTC
- Forum: Mathematics
- Topic: New Mathematical Operation: Swagger
- Replies:
**19** - Views:
**2752**

### Re: New Mathematical Operation: Swagger

The Swagger group is not a group, at least under addition or mulitplication. For instance, take 25,137\in SW_{10} 25+137=162\in SW_{8} \neq SW_{10} 25*137=3425\in SW_{19} \neq SW_{10} So, if the "Swagger Group" is to be a group, it'll need a new binary operation. Edit: We could consider it...

- Mon May 18, 2009 11:04 pm UTC
- Forum: Mathematics
- Topic: linear eqations help
- Replies:
**3** - Views:
**741**

### Re: linear eqations help

There won't be a single unique solution. You'll notice that if you plug in e2=.533 in your two derived equations, you'll get the "solution." (0,0,0) is also a solution. Any triplet of the form (15/8*e2, e2, 11/8*e2) will be a solution for any e2

- Sat May 16, 2009 9:27 pm UTC
- Forum: News & Articles
- Topic: Wolfram Alpha Tricks and Randomness
- Replies:
**69** - Views:
**10855**

### Re: Wolfram Alpha

What is the mean air speed of an unladen swallow? mean air speed of an unladen swallow Assuming estimated average cruising airspeed of an unladen African swallow | Use estimated average cruising airspeed of an unladen European swallow instead :mrgreen: Edit: Weird. Doing gdp of russia / price of ibm...

- Fri May 15, 2009 2:36 am UTC
- Forum: Gaming
- Topic: Infiniminer!
- Replies:
**47** - Views:
**10950**

### Re: Infiniminer!

I just downloaded it because of this thread, and it is AWESOME! However, is there a way to change classes? It would be nice to be able to flatten the map with a demo guy and then switch to engineer to build my doom fortress. At the surface, hit the 'm' key. It'll bring up the class selection screen...

- Wed May 13, 2009 4:37 am UTC
- Forum: Mathematics
- Topic: Algorithm and a Question
- Replies:
**3** - Views:
**700**

### Re: Algorithm and a Question

There's an easier but similar method than luvrhino's. Just try adding things together until you notice something that can easily be removed. It involves luvrhino's first tip, but something easier than his second.

- Mon May 11, 2009 5:54 am UTC
- Forum: Gaming
- Topic: Games you can't remember the title of.
- Replies:
**1940** - Views:
**557951**

### Re: Games you can't remember the title of.

* Background: PC game, similar to Cave Story * Year: Fairly recently, within the last 5 years. * Perspective: 2D * Art style: Sprite based * Environment: I think it was a laboratory of sorts. No side scrolling. Each room was its own screen. * Mood: Fairly cheerful * Genre: Single player platformer *...

- Mon May 11, 2009 2:29 am UTC
- Forum: General
- Topic: Ender and the Kobayashi Maru
- Replies:
**58** - Views:
**5700**

### Re: Ender and the Kobayashi Maru

He'd probably pull a Kirk and have Bean reprogram it.

- Sun May 10, 2009 4:13 pm UTC
- Forum: Science
- Topic: Name for the phenomenom where liquid "creeps" up the side...
- Replies:
**5** - Views:
**1052**

- Sun May 03, 2009 2:57 am UTC
- Forum: Gaming
- Topic: Most Bogus Gaming moments.
- Replies:
**179** - Views:
**22077**

### Re: Most Bogus Gaming moments.

Legacy of Kain: Soul Reaver: To Be Continued as the ending to an otherwise awesome game.

Earthbound: Saving the game after being turned into a robot and having no way to get back.

Earthbound: Saving the game after being turned into a robot and having no way to get back.

- Fri Apr 24, 2009 11:02 am UTC
- Forum: General
- Topic: The ToneMatrix
- Replies:
**38** - Views:
**2470**

### Re: The ToneMatrix

This is really cool. Even I can create something neat sounding. I wonder when the first rapper will come out to sample this site? 66576,512,17424,0,66112,1024,16960,0,67648,1056,18448,0,65856,544,17424,0 Wow! This is so much fun. I'll just edit this post with new creations as they come along. Origin...

- Sun Apr 19, 2009 11:37 pm UTC
- Forum: Mathematics
- Topic: Euler's identity
- Replies:
**12** - Views:
**2140**

### Re: Euler's identity

(Of course, log(ab)= log(a)+log(b) still fails to hold for other examples, in particular log(1) != log(1) + log(1)). log(1) = 0 0 + 0 = 0 log(1)= 2*pi*i for the branch I was talking about. Edit: this branch doesn't agree with the usual ln(x) on the positive reals of course, which is a bit unfortuna...

- Thu Apr 16, 2009 10:42 am UTC
- Forum: Mathematics
- Topic: Differential equation help
- Replies:
**1** - Views:
**514**

### Re: Differential equation help

Do you have any initial conditions?

- Thu Apr 02, 2009 4:20 am UTC
- Forum: Mathematics
- Topic: Calculus Team Name
- Replies:
**24** - Views:
**11517**

### Re: Calculus Team Name

The Gaussketeers

- Thu Mar 19, 2009 10:24 am UTC
- Forum: Mathematics
- Topic: Different definitions of an open set
- Replies:
**18** - Views:
**1620**

### Re: Different definitions of an open set

Not to be snide, but {2,3,4} clearly DOES contain a neighborhood of its points, namely itself. If you'll remember the definition of a neighborhood of a point x is a set V such that there exists an open set U such that [math]x\in U\subseteq V[/math] In the above statement, {2,3,4} is both U and V.

- Sat Mar 14, 2009 8:14 pm UTC
- Forum: Mathematics
- Topic: Math in Modern Music
- Replies:
**11** - Views:
**1262**

- Wed Jan 21, 2009 12:41 am UTC
- Forum: Mathematics
- Topic: I can't solve my 9yr old sister's maths problem...
- Replies:
**18** - Views:
**2472**

### Re: I can't solve my 9yr old sister's maths problem...

Cosmologicon wrote:poirelli wrote:Clearly you cannot have more than 2 red tiles on a given row....Code: Select all

`R W R R`

R W W W

W* W* W* R

R R W R

Code: Select all

`R R W W`

R R W W

W W R R

R R W W

and

Code: Select all

`R R W R`

R R W R

W W R W

R R W R

But that has 10 red and 6 white.

- Sun Nov 09, 2008 11:33 pm UTC
- Forum: Mathematics
- Topic: Mathematics science fair (non-10 bases)
- Replies:
**16** - Views:
**1893**

### Re: Mathematics science fair (non-10 bases)

Something I find interesting, is that all primes greater than six will have a remainder of 1 or 5 when divided by six. Thus except for 2 and 3, all primes will have a base 6 representation with a 1 or 5 in the ones place.

I don't know if this can lead to any project, but it may be food for thought.

I don't know if this can lead to any project, but it may be food for thought.

- Sat Oct 18, 2008 5:20 pm UTC
- Forum: Mathematics
- Topic: How many combanations are there for a 4 character password?
- Replies:
**15** - Views:
**2019**

### Re: How many combanations are there for a 4 character password?

qinwamascot wrote:I think there aren't any required characters in the password, or else he'd have probably told us. But if we make that assumption your math is correct.

I was making a joke about password security policies that I don't necessarily agree with.

- Sat Oct 18, 2008 6:00 am UTC
- Forum: Mathematics
- Topic: How many combanations are there for a 4 character password?
- Replies:
**15** - Views:
**2019**

### Re: How many combanations are there for a 4 character password?

While you may have a four character password, you must have one uppercase letter, one lowercase letter, one number and one special character from the set !, # or $. Hence, you only have 26 * 26 * 10 * 3 = 20280 possible passwords. EDIT: Actually, I think there are more. Let me refigure this. Since t...

- Wed Sep 17, 2008 9:48 pm UTC
- Forum: Mathematics
- Topic: Down with the Sickness.
- Replies:
**12** - Views:
**1830**

### Re: Down with the Sickness.

I'd say math is similar to diabetes. It's not contagious. It's potentially hereditary. If you go too long without math, you go into a coma.

- Mon Sep 15, 2008 4:41 am UTC
- Forum: Coding
- Topic: Coding: Fleeting Thoughts
- Replies:
**9990** - Views:
**1999800**

### Re: Coding: Fleeting Thoughts

My fleeting thought is that (nearly) every project euler problem has three stages. Stage 1) Wonder how to solve the problem. Write some spaghetti code, throw it out. Stage 2) Get an elegant way to solve it. Spend some time trying to figure out why your compiler is throwing a fit. Stage 3) Have code...

- Sun Sep 07, 2008 7:12 pm UTC
- Forum: Mathematics
- Topic: find something about the number
- Replies:
**65** - Views:
**5259**

### Re: find something about the number

23: 9 + 11 + 2 + 0 + 0 + 1 = 23 GLOBAL CONSPIRACY

- Sat Sep 06, 2008 10:24 pm UTC
- Forum: Coding
- Topic: Name of a Programming game where AI is coded for an RTS?
- Replies:
**11** - Views:
**2115**

### Re: Name of a Programming game where AI is coded for an RTS?

Looking around I found this blag about Battlecode. This sounds like what you're talking about.