Search found 2004 matches

by 4=5
Sun Jul 16, 2017 2:00 am UTC
Forum: General
Topic: Banned from Stack Exchange
Replies: 29
Views: 6680

Re: Banned from Stack Exchange

I got kicked for 24 hours for requesting that another user be banned for consistently posting cliche fanfiction ideas.
by 4=5
Fri Feb 10, 2017 1:14 am UTC
Forum: Mathematics
Topic: Favorite math jokes
Replies: 1452
Views: 418799

Re: Favorite math jokes

Which reminds me: What is the best anagram of Banach Tarski? Banach Tarski Banach Tarski. The more that joke gets deconstructed, the the funnier it gets. http://forums.xkcd.com/viewtopic.php?f=17&t=5683&start=66 http://forums.xkcd.com/viewtopic.php?f=17&t=5683#p439797 http://forums.xkcd...
by 4=5
Thu Feb 09, 2017 11:50 pm UTC
Forum: Mathematics
Topic: Favorite math jokes
Replies: 1452
Views: 418799

Re: Favorite math jokes

(from twitter)
Mathematicians often like to point out the obvious, such as "Anagram is an anagram of anagram." It gives them a sense of group identity.
by 4=5
Sat Jan 28, 2017 4:54 am UTC
Forum: Forum Games
Topic: Count to a Million
Replies: 72548
Views: 4112925

Re: Count to a Million

Finding this thread is mind blowing in the same way as finding out that someone has built a toothpick model of the taj mahal.


68788
by 4=5
Wed Jan 25, 2017 5:09 am UTC
Forum: General
Topic: Most excellent times
Replies: 5111
Views: 680054

Re: Awesome Natterings

I'd like to show off my new much smoother avatar.
by 4=5
Sun Aug 04, 2013 4:04 am UTC
Forum: Mathematics
Topic: How would I prove this? (some trick with factorials?)
Replies: 4
Views: 2346

How would I prove this? (some trick with factorials?)

I was playing around and empirically identified this relation
x and n are non-negative integers.

[; \frac{1}{(n+x+1)} = \sum_{i=0}^{n} \frac{(-1)^{i}(n+x)!}{x!i!(n-i)!(x+i+1)} ;]

How would I go about proving it?
by 4=5
Sun Feb 17, 2013 5:05 am UTC
Forum: Mathematics
Topic: A Thread for scratch123's Random Math Questions
Replies: 71
Views: 13877

Re: A Thread for scratch123's Random Math Questions

Actually could I borrow scratch123 for a moment? I'd like to automate his pattern recognition abilities and limitations for my own purposes. scratch123: could you let me know of all the non random patterns in each of these five sequences? The things that catch your attention and seem unusual. 111100...
by 4=5
Sat Feb 16, 2013 2:46 am UTC
Forum: Science
Topic: Radiation-Based Biology?
Replies: 42
Views: 6003

Re: Radiation-Based Biology?

Gas is really easy to control in a liquid environment because it stays in downward facing open containers. If they filled a container with methane and let dissolved oxygen undissolve into it they can discover fire by heating it up. And considering that their life basically runs of hot vents they wou...
by 4=5
Thu Feb 07, 2013 8:35 pm UTC
Forum: Mathematics
Topic: Probabilities question (d20 vs. 20 coins)
Replies: 14
Views: 2312

Re: Probabilities question (d20 vs. 20 coins)

well the average number of flips for 5 coins would be 5 + 5*12/32 + 5*(12/32)^2 ... and since the limit of 1 + 1/n + 1/n^2 ... is n/(n-1) 12/32 => ( 32/12) /(32/12 - 12/12) 32/12 / 20/12 32/12 * 12/20 32/20 so the average number of coin flips to simulate a d20 with 5 coins is 5 * 32/20 so for an arb...
by 4=5
Fri Oct 19, 2012 11:45 pm UTC
Forum: Computer Science
Topic: I finally get types
Replies: 1
Views: 3262

I finally get types

"Type" is just another name for anything you've proven about the value at that point in the program. If I needed to display comments on my blog I could use types make sure that I never display comments that do dangerous things. newtype UnsafeString = UnsafeString String newtype SafeString ...
by 4=5
Thu Oct 11, 2012 1:22 am UTC
Forum: Religious Wars
Topic: Mouse vs Keyboard
Replies: 69
Views: 59428

Re: Mouse vs Keyboard

I prefer mouse + keyboard + chorded-keyboard.
by 4=5
Sun Jul 22, 2012 5:57 am UTC
Forum: Computer Science
Topic: Ambiguous cases and Asimov's Three Laws of Robotics
Replies: 50
Views: 37936

Re: Ambiguous cases and Asimov's Three Laws of Robotics

Asimov's stories always seemed to be about willfully stupid programmers. Only crazy programmers would implement rules as if the robots had them literally written down in their heads. And the programmers must be stupid because they never fix the problem. Here are three rules I came up with, and here ...
by 4=5
Sat May 05, 2012 2:23 am UTC
Forum: Mathematics
Topic: which matters more; the base or the exponent?
Replies: 2
Views: 1219

which matters more; the base or the exponent?

if you take two numbers like two and three and exponentiate them 3^2 > 2^3 In this case, putting the larger number as the base wins. But as you move to larger pairs of numbers the exponent takes more control over the result to the point where the base hardly matters. So if we put them right at the p...
by 4=5
Wed Sep 21, 2011 11:22 pm UTC
Forum: Mathematics
Topic: unbiased iterative function
Replies: 1
Views: 479

unbiased iterative function

I have a list of 50 random numbers generated from an even distribution. I want to generate another from the same distribution, replace the oldest number with it, and then repeat. How do I keep the range of values from converging to 0? My current method is to find the average distance from the averag...
by 4=5
Tue Aug 30, 2011 4:02 pm UTC
Forum: Mathematics
Topic: Recursion Tattoo Ideas
Replies: 27
Views: 8726

Re: Recursion Tattoo Ideas

You could try jethro tull; "watching me watching you watching him".
by 4=5
Sat Aug 27, 2011 12:16 am UTC
Forum: Logic Puzzles
Topic: Logic Poll
Replies: 12
Views: 2953

Re: Logic Poll

that last question is easy.
by 4=5
Sun Jul 24, 2011 11:00 pm UTC
Forum: General
Topic: Does anyone else dislike most kids?
Replies: 251
Views: 26275

Re: Does anyone else dislike most kids?

kids are great fun once they can walk. If they are too young to talk I can just imitate their actions and it starts a game. They want power and attention so it is generally very easy to understand their actions and provide a socially acceptable way towards their goals. The only part that gets to me ...
by 4=5
Mon Jun 27, 2011 4:03 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 0917: "Hofstadter"
Replies: 127
Views: 53524

Re: 0917: "Hofstadter"

Hofstadter's Contracrostipunctus Acrostically Backwards Spells J. s. bach
by 4=5
Tue Apr 26, 2011 12:05 am UTC
Forum: News & Articles
Topic: The universe's dimensions may change with age, energy, scale
Replies: 29
Views: 3457

Re: The universe's dimensions may change with age, energy, s

Stojkovic and Mureika have reasoned that the Laser Interferometer Space Antenna (LISA), a planned international gravitational observatory, should not detect any gravitational waves emanating from the lower-dimensional epochs of the early universe. The only problem that I know of with this test is t...
by 4=5
Fri Jan 21, 2011 5:23 am UTC
Forum: Individual XKCD Comic Threads
Topic: 0850: "World According To Americans"
Replies: 712
Views: 145257

Re: 0850: "World According To Americans"

I can tell that the map was drawn by people from the east coast by the way they draw the west coast. I think this is a pretty accurate map of how americans view the world.
by 4=5
Fri Jan 07, 2011 10:25 pm UTC
Forum: Mathematics
Topic: Simplifying a Trigonometric Expression
Replies: 2
Views: 531

Re: Simplifying a Trigonometric Expression

thank you
by 4=5
Fri Jan 07, 2011 10:09 pm UTC
Forum: Mathematics
Topic: Simplifying a Trigonometric Expression
Replies: 2
Views: 531

Simplifying a Trigonometric Expression

As you probably know the beat frequency of the combination of two sign waves is their greatest common factor. so naturally I wondered what the beat frequency of an irrational ratio would be. I found a way of finding a wave that perfectly fit visually but I don't know how to simplify this equation. s...
by 4=5
Tue Aug 03, 2010 11:52 pm UTC
Forum: Gaming
Topic: Biology flash game (Done!)
Replies: 59
Views: 7539

Re: Biology flash game (Done!)

I stopped playing after a couple missions because I wanted to actually play as a cell and having each organelle be a little icon bugged me.
by 4=5
Sun Aug 01, 2010 9:03 pm UTC
Forum: News & Articles
Topic: Oil from... bacteria!
Replies: 42
Views: 3181

Re: Oil from... bacteria!

What makes oil wonderful is that it lets us cut our bonds from the sun. That aside, this is an interesting development.
by 4=5
Fri Jun 25, 2010 12:36 am UTC
Forum: News & Articles
Topic: Anti-Obesity Group will sue McDonald's over Happy Meal toys
Replies: 74
Views: 5800

Re: Anti-Obesity Group will sue McDonald's over Happy Meal t

Oh, don't look at me this way, I consider almost all advertisements as evil (and downright contrary to fair competition) and would love to see ads forbidden Are you willing to accept losing many of your television channels and paying a higher price to watch television? Willing to lose every site on...
by 4=5
Wed Jun 09, 2010 2:10 pm UTC
Forum: Mathematics
Topic: Statistics Research Paper
Replies: 17
Views: 3660

Re: Statistics Research Paper

please DO NOT fix the ability to skip questions, some questions the answer is "it depends" and the only way I can show that is by skipping
by 4=5
Wed Jun 09, 2010 2:06 pm UTC
Forum: General
Topic: Need you Guys to Take a Survey for me, Please!
Replies: 18
Views: 1460

Re: Need you Guys to Take a Survey for me, Please!

by "most harmful greenhouse gas" do you mean
most harmful when inhaled?
causes the most warming per cubic meter of gas?
is responsible for the most warming?
by 4=5
Mon May 31, 2010 1:36 am UTC
Forum: News & Articles
Topic: Tight pants ban takes effect in Indonesia's Aceh
Replies: 42
Views: 4767

Re: Tight pants ban takes effect in Indonesia's Aceh

yoni45 wrote:Either way, I'm going by the presumption that we're not actually taking issue with such laws.

I do take issue with those laws, I know people who got arrested from protesting sexist indecent exposure laws.
by 4=5
Sun May 30, 2010 1:40 am UTC
Forum: Gaming
Topic: Cool games on the interweb redux
Replies: 511
Views: 266187

Re: Cool games on the interweb redux

Here's a really cool game Manufactoria Excellent game! I find it quite difficult and have had lots of fun trying to find algorithms which will work :) The harder the struggle, the sweeter the victory. programming games for not just the win, but the domestic treble it is an excellent game. I'm using...
by 4=5
Sun May 30, 2010 1:34 am UTC
Forum: Logic Puzzles
Topic: Slash 'n' Dash Sequence
Replies: 4
Views: 1327

Re: Slash 'n' Dash Sequence

Looks like /-\---- /-\//-\\ /-\----- comes next. (Pretty good puzzle, I hope others give it a go.) Edit: The top string in the sequence "-" isn't incorrect, but it would be better if it were the empty string "". Of course, in the forums, this would be hard to distinguish from a ...
by 4=5
Thu May 27, 2010 2:21 am UTC
Forum: Logic Puzzles
Topic: 100 Princesses Problem... and dating
Replies: 9
Views: 3416

Re: 100 Princesses Problem... and dating

have you tried joining clubs that do things you enjoy? Or maybe starting one. Try going to street fairs and other public gatherings. Ask your friends to keep an eye out for someone that would suit you. Or you could do what I did and knit in public. Have you tried putting a math problem on the board ...
by 4=5
Wed May 26, 2010 11:46 pm UTC
Forum: Gaming
Topic: Biology flash game (Done!)
Replies: 59
Views: 7539

Re: Biology flash game (not finished)

it looks interesting and possibly fun. The centromere icon strikes me strangely, but I can't say much until I've played it.
by 4=5
Tue May 25, 2010 2:06 am UTC
Forum: Serious Business
Topic: When did lying become kidding?
Replies: 39
Views: 8158

Re: When did lying become kidding?

But the child certainly can't expect to know the rules, willingly break them, lie about it, and expect that he can get off scot-free. Yes the child can, they don't want to get punished so they try anything to not get punished. I remember being a child, I would do what I wanted to and then if the au...
by 4=5
Sun May 23, 2010 12:57 am UTC
Forum: News & Articles
Topic: Rand Paul, Rachel Maddow, Civil Rights, Libertarianism
Replies: 78
Views: 5861

Re: Rand Paul, Rachel Maddow, Civil Rights, Libertarianism

Question for the forum: What do you think of women's only gyms and health clubs? Men's only country clubs? As long as membership isn't heavily connected with power outside of it I am perfectly fine. In this one business I know of, most of the people that happen to be promoted all go to the same chu...
by 4=5
Sun May 23, 2010 12:50 am UTC
Forum: News & Articles
Topic: Canadian law faculties 'like psychotic kindergartens'
Replies: 13
Views: 2279

Re: Canadian law faculties 'like psychotic kindergartens'

For many years I taught a course called "Media Law" ; the central concept in this course was freedom of expression. Students were hostile towards freedom of expression. Whenever I argued in favour of it, the students’ reaction was exactly what I would have expected had I been advocating s...
by 4=5
Fri May 14, 2010 7:23 am UTC
Forum: Mathematics
Topic: Wanted: punch line for joke
Replies: 15
Views: 2755

Re: Wanted: punch line for joke

Yakk wrote:Sure? But do clean it up. I got a bit silly at the end.

I'm having trouble parsing "the can can can can can". Could you explain what the first 4 cans mean?
by 4=5
Tue May 11, 2010 5:45 am UTC
Forum: News & Articles
Topic: Congrats, you're parts Neanderthal!
Replies: 36
Views: 2654

Re: Congrats, you're parts Neanderthal!

1 to 4% seems like a much larger percentage than I would expect.
by 4=5
Thu Apr 29, 2010 3:37 am UTC
Forum: Mathematics
Topic: How do I solve this Recurrence Relation
Replies: 3
Views: 1438

Re: How do I solve this Recurrence Relation

thank you very much :D . It is exactly what I was looking for. What I can do with it is divide it by the function n^x, set n equal to the inverse of the recombonation ratio between any two genetic markers and it will tell me the recombination ratio between any other two points on the chromosome as a...
by 4=5
Wed Apr 28, 2010 4:22 am UTC
Forum: Mathematics
Topic: How do I solve this Recurrence Relation
Replies: 3
Views: 1438

How do I solve this Recurrence Relation

I discovered this function in the course of my explorations and I do not know how to take the recursion out of it so I can make it continuous F(0)=0 F(x)=F(x-1)*(n-2) + n^(x-1) if I take an n sided die and roll it x times it tells me the number of results (out of n^X total) that have an odd number o...
by 4=5
Wed Apr 21, 2010 1:41 am UTC
Forum: Coding
Topic: learning about regular expressions
Replies: 9
Views: 1878

learning about regular expressions

So I'm reading everywhere about regular expressions because they seem like a cool idea. but I've got a couple questions. Is there a simple way to say that you are looking for a b and c right next to each other but you don't care about the order? Is there a way to say that you are looking for any str...

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