Search found 319 matches

by Proginoskes
Sun Feb 12, 2012 7:18 am UTC
Forum: Religious Wars
Topic: Chess vs. Go Which is the better board game.
Replies: 55
Views: 28440

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

In Chess Life a few decades ago, a checker player played against a chess player; each set up their half of the board with their pieces and played by their rules. The checker player won, although the chess player has an unbeatable strategy.
by Proginoskes
Sat Feb 11, 2012 8:20 am UTC
Forum: Mathematics
Topic: Largest 3 consecutive semi-primes?
Replies: 19
Views: 5842

Re: Largest 3 consecutive semi-primes?

tomtom2357 wrote:That is probably about as difficult as the twin prime problem, which has not been solved yet.


A new milestone has been reached, though: Terrence Tao recently proved that every odd number is the sum of at most five primes.
by Proginoskes
Sat Feb 11, 2012 8:10 am UTC
Forum: Science
Topic: Formula for lunar phase?
Replies: 2
Views: 9067

Re: Formula for lunar phase?

If you're only interested in the day, a few simple algorithms are available at http://www.ben-daglish.net/moon.shtml A NASA website says: Algorithms used in predicting the phases of the Moon as well as eclipses are based on Jean Meeus' Astronomical Algorithms (Willmann-Bell, Inc., Richmond, 1998). Y...
by Proginoskes
Fri Feb 10, 2012 7:45 am UTC
Forum: Mathematics
Topic: help with diophantine approximation.
Replies: 39
Views: 5912

Re: help with diophantine approximation.

Have you tried solving simpler problems, like maximizing

min ( <a><b>, 2<2a><2b> )
min ( <a><b>, 2<2a><2b>, 3<3a><3b> )
...

?

(I'm using <a> for your ||a||, since ||a||||b|| is nasty on the eyes ...)
by Proginoskes
Thu Feb 09, 2012 7:19 am UTC
Forum: Your art and links
Topic: Insult Generator
Replies: 19
Views: 10800

Re: Insult Generator

Are you always thinking of the right comeback twenty minutes too late? Do people always make fun of your duck in hoi sin sauce wrap or dole cheque? Well for quick, effective comebacks look no further... introducing: THE INSULT GENERATOR!!! Nice stupid algorithm , you lazy bastard . Mad-libs are not...
by Proginoskes
Mon Feb 06, 2012 6:01 am UTC
Forum: Mathematics
Topic: A Probability Conundrum
Replies: 7
Views: 1277

Re: A Probability Conundrum

The mean sum is easy ... you take the expected value and multiply it by the number of cards: \left(1 \cdot {12\over56} + 2\cdot{8\over 56} + 3 \cdot {8\over 56} + \cdots + 6\cdot {8\over 56} + 7 \cdot {4\over 56}\right)\cdot 5 which is 125/7 (checked with Maple). (This works because I'm usin...
by Proginoskes
Sat Feb 04, 2012 6:58 am UTC
Forum: Logic Puzzles
Topic: Overhanging dominoes
Replies: 9
Views: 4711

Re: Overhanging dominoes

Which brings us to our next problem: for each positive integer N, using exactly N tiles, what is the greatest amount of overhang that can be realized? That is, the single tile that overhangs the most, its amount of overhang is to be maximized among all stable arrangements of N tiles. A couple of ye...
by Proginoskes
Wed Feb 01, 2012 6:26 am UTC
Forum: Science
Topic: How can I obtain hard-to-get papers?
Replies: 14
Views: 2384

Re: How can I obtain hard-to-get papers?

To the OP: If you post the journals you're looking for, you'll probably get lots of help.
by Proginoskes
Wed Feb 01, 2012 6:24 am UTC
Forum: Mathematics
Topic: An interesting probability problem that I thought of
Replies: 5
Views: 1204

Re: An interesting probability problem that I thought of

314man wrote:The trend continues to be n / (n+1)!


Digression: There's a classical problem where you have to show that
[math]{1\over 2!} + {2 \over 3!} + {3 \over 4!} + \cdots + {n-1 \over n!} = 1 - {1\over n!},[/math]
which is usually done by induction. This is another proof of the same result.
by Proginoskes
Tue Jan 31, 2012 7:15 am UTC
Forum: Gaming
Topic: Games you have programmed
Replies: 93
Views: 37401

Re: Games you have programmed

Dason wrote:Eh - I don't really care too much. I just thought you might want to update the link in case you were going to share that with other people.


Actually, I did that too. Thanks.
by Proginoskes
Tue Jan 31, 2012 7:09 am UTC
Forum: Religious Wars
Topic: Admit it. Your first OS is your favorite.
Replies: 81
Views: 47536

Re: Admit it. Your first OS is your favorite.

First OS: Er ... what did the Timex/Sinclair 1000 run on?
Spoiler:
According to Wikipedia ... Sinclair BASIC


Okay, maybe that one doesn't count. Next OS: DOS 3.3 (Apple IIc)
by Proginoskes
Mon Jan 30, 2012 7:42 am UTC
Forum: Computer Science
Topic: Regular Expression for the following language
Replies: 6
Views: 2234

Re: Regular Expression for the following language

((a|b|c|d)*a(a|b|c|d)*a(a|b|c|d)*c(a|b|c|d)*c(a|b|c|d)*c(a|b|c|d)*c(a|b|c|d)*|...) (where "..." means "and done similarly for all other ordings of aacccc"), i.e., brute force, works but looks very messy.
by Proginoskes
Mon Jan 30, 2012 7:29 am UTC
Forum: Gaming
Topic: Games you have programmed
Replies: 93
Views: 37401

Re: Games you have programmed

A one-player version of Kensington (which probably violates all sorts of copyright laws) ... http://www.public.asu.edu/~checkma/Kensington/ The AI isn't too good; I've tried to do the programming in Javascript. The link to the rules seems to be broken. Oh. Use the Wayback Machine then: http://web.a...
by Proginoskes
Mon Jan 30, 2012 7:23 am UTC
Forum: Science
Topic: Astrology
Replies: 9
Views: 2166

Re: Astrology

I can never find my horoscope in the paper. You see, I'm a Cetus (the Whale).
by Proginoskes
Sun Jan 29, 2012 7:25 am UTC
Forum: Mathematics
Topic: Favourite Erroneous "Proofs"
Replies: 194
Views: 41938

Re: Favourite Erroneous "Proofs"

AFAIK, this one is new:

-1 = det [-1] = | -1 | = abs(-1) = 1.

"Proof by confusion of notation."
by Proginoskes
Sun Jan 29, 2012 7:21 am UTC
Forum: Religious Wars
Topic: Chess vs. Go Which is the better board game.
Replies: 55
Views: 28440

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

I couldn't get past the rules for determining who wins a game ... Placing captured pieces in open areas and counting? Really?

Of course, I learned Chess first ...
by Proginoskes
Sun Jan 29, 2012 7:19 am UTC
Forum: Gaming
Topic: Games you have programmed
Replies: 93
Views: 37401

Re: Games you have programmed

A one-player version of Kensington (which probably violates all sorts of copyright laws) ... http://www.public.asu.edu/~checkma/Kensington/ The AI isn't too good; I've tried to do the programming in Javascript. I wrote a Win32 version of "Subway Shuffle". I had communicated with the author...
by Proginoskes
Sat Jan 28, 2012 7:47 am UTC
Forum: Religious Wars
Topic: Chess vs. Go Which is the better board game.
Replies: 55
Views: 28440

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

What do you mean by "better"? BTW, in the 1980s, a lot of difficult Go positions were analyzed using Combinatorial Game Theory ... look for a book called Mathematical Go Endgames: Nightmares for the Professional Go Player by Berlecamp and Wolfe if you want the details. You might have bett...
by Proginoskes
Sat Jan 28, 2012 7:46 am UTC
Forum: Religious Wars
Topic: Chess vs. Go Which is the better board game.
Replies: 55
Views: 28440

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

What do you mean by "better"?

BTW, in the 1980s, a lot of difficult Go positions were analyzed using Combinatorial Game Theory ... look for a book called Mathematical Go Endgames: Nightmares for the Professional Go Player by Berlecamp and Wolfe if you want the details.
by Proginoskes
Fri Jan 27, 2012 4:58 am UTC
Forum: News & Articles
Topic: Obama attacks, defends bailouts.
Replies: 46
Views: 4899

Re: Obama attacks, defends bailouts.

Anyways, I don't think it's just racism that effects ridiculous criticism of Obama. I myself am too young to remember the Clinton administration in any useful detail, but my dad tells me that there was about as much ridiculous partisanship and obstructionism then. I mean hell, they impeached Clinto...
by Proginoskes
Thu Jan 26, 2012 7:14 am UTC
Forum: News & Articles
Topic: Obama attacks, defends bailouts.
Replies: 46
Views: 4899

Re: Obama attacks, defends bailouts.

Iulus Cofield wrote:Here we go. I'll get the the milk duds and root beer.


Are you in your comfortable chair as well?
by Proginoskes
Thu Jan 26, 2012 7:11 am UTC
Forum: Mathematics
Topic: Set-theoretic brain fart
Replies: 9
Views: 2057

Re: Set-theoretic brain fart

In my amateur opinion, I don't think the "large" in "large cardinal" means what you think it means. I mean, you already know that size is relative, so in some sense it can't. Besides, in any model of ZFC, the cardinals already go all the way up to the top. I don't believe that's...
by Proginoskes
Tue Jan 24, 2012 6:49 am UTC
Forum: General
Topic: Anyone know what this font is?
Replies: 8
Views: 1611

Re: Anyone know what this font is?

What can I say? I'm a font freak! (And that's a useful website, even though this might be only the second time I've used it.)
by Proginoskes
Tue Jan 24, 2012 6:35 am UTC
Forum: Serious Business
Topic: New (old) anti-piracy threats -- ACTA etc.
Replies: 10
Views: 8365

Re: A new (old) threat

According to ACTA, the person being charged with copyright violation would have to prove that their material does not violate copyright. This is the exact opposite of the rights guaranteed by the Bill of Rights (due process, "innocent until proven guilty", etc.). It is NOT constitutional....
by Proginoskes
Tue Jan 24, 2012 6:30 am UTC
Forum: Computer Science
Topic: Ugh... fiendish CS proffs...
Replies: 26
Views: 4574

Re: Ugh... fiendish CS proffs...

jareds wrote:As originally posed, the problem is in Scheme, which has exact rationals.


Oh. Well, I was confused by the C code.
by Proginoskes
Tue Jan 24, 2012 6:07 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1007: "Sustainable"
Replies: 115
Views: 28929

Re: 1007: "Sustainable"

zugy wrote:Google was unusually popular around the 1900's. I suspected it was recaptcha typos of googol, however a quick search and scanning of the results makes me suspect otherwise. Smells like recaptcha shenanigans to me!


Nope. The word "googol" was coined in 1929.
by Proginoskes
Tue Jan 24, 2012 6:04 am UTC
Forum: General
Topic: Anyone know what this font is?
Replies: 8
Views: 1611

Re: Anyone know what this font is?

http://new.myfonts.com/WhatTheFont/ says that the name of the font is Confidential. (That's its name; it's not a confidential name.)

See http://new.myfonts.com/fonts/fontfont/f ... fidential/
by Proginoskes
Mon Jan 23, 2012 6:56 am UTC
Forum: Serious Business
Topic: New (old) anti-piracy threats -- ACTA etc.
Replies: 10
Views: 8365

Re: A new (old) threat

Could you add ACTA to the thread title? Thanks. I didn't really know what it was but heard it mentioned in the course of SOPA/PIPA discussions, and I've just started branching out to finding out other bullshit going on. I just looked around and I found one video from 2009 that explains why ACTA (An...
by Proginoskes
Mon Jan 23, 2012 6:47 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1007: "Sustainable"
Replies: 115
Views: 28929

Re: 1007: "Sustainable"

Did anyone else notice the levelling off between 2000 and 2008? Gee, it's almost as if ...
by Proginoskes
Mon Jan 23, 2012 2:14 am UTC
Forum: Computer Science
Topic: Ugh... fiendish CS proffs...
Replies: 26
Views: 4574

Re: Ugh... fiendish CS proffs...

There's another nuance to this problem ... Since computers can't express 1/3 exactly (with floating point), [3, 1, 1/3] wouldn't turn out to be a geometric series, since 3 * (1/3) is highly unlikely to equal 1 exactly.
by Proginoskes
Mon Jan 23, 2012 2:03 am UTC
Forum: Mathematics
Topic: A maths question is giving me some difficulty...
Replies: 12
Views: 2400

Re: A maths question is giving me some difficulty...

Does your helper get to share the Prize of Great Worth?
by Proginoskes
Fri Jan 20, 2012 7:21 am UTC
Forum: Mathematics
Topic: New google statistic
Replies: 6
Views: 2421

Re: New google statistic

I don't shave when I shower. I'd get electrocuted.
by Proginoskes
Fri Jan 20, 2012 7:19 am UTC
Forum: Computer Science
Topic: Ugh... fiendish CS proffs...
Replies: 26
Views: 4574

Re: Ugh... fiendish CS proffs...

Also, letterX's code crashes for the sequence [0, 0, 0, 0, ...]
by Proginoskes
Thu Jan 19, 2012 6:35 am UTC
Forum: Computer Science
Topic: Pattern analysis
Replies: 5
Views: 2033

Re: Pattern analysis

Re-reading your original question, it looks like you are more interested in the "magic happens" step here of determining this simplest Turing machine (or some other representation of an algorithm) that would output the sequence. One (again theoretical) way would be to enumerate all Turing...
by Proginoskes
Tue Jan 17, 2012 5:04 am UTC
Forum: Religious Wars
Topic: The Rise and Fall of Programming Languages in 2011
Replies: 20
Views: 8999

Re: The Rise and Fall of Programming Languages in 2011

Interesting that C++ took a nosedive around 2005 ... That was about when some of the standards were changed (including the addition of namespaces). Um, no? The first standard was published in 1998 (including namespaces), and the second in 2011. There was a revision around 2003 but those were only m...
by Proginoskes
Tue Jan 17, 2012 5:00 am UTC
Forum: Mathematics
Topic: Nonstandard proofs for simple theorems
Replies: 34
Views: 6818

Re: Nonstandard proofs for simple theorems

(I assume that other theorem are allowed here.)

How about Fürstenberg's proof of the infinitude of primes?

http://en.wikipedia.org/wiki/F%C3%BCrst ... _of_primes

(or http://www.cut-the-knot.org/proofs/Furstenberg.shtml , since Wikipedia is going away in a day or so.)
by Proginoskes
Mon Jan 16, 2012 4:27 am UTC
Forum: Computer Science
Topic: Mind Blowing Algorithms
Replies: 76
Views: 27700

Re: Mind Blowing Algorithms

I saw the following code online for the number of 1s. Haven't tested it. /* count number of 1's in 9-bit argument (Schroeppel) */ unsigned count_ones(unsigned36 a) { return ((a * 01001001001) /* 4 adjacent copies */ & 042104210421) /* every 4th bit */ % 15; /* casting out 15.'s in hexadecimal */...
by Proginoskes
Mon Jan 16, 2012 4:22 am UTC
Forum: Religious Wars
Topic: The Rise and Fall of Programming Languages in 2011
Replies: 20
Views: 8999

Re: The Rise and Fall of Programming Languages in 2011

Interesting that C++ took a nosedive around 2005 ... That was about when some of the standards were changed (including the addition of namespaces). Um, no? The first standard was published in 1998 (including namespaces), and the second in 2011. There was a revision around 2003 but those were only m...
by Proginoskes
Mon Jan 16, 2012 4:13 am UTC
Forum: Mathematics
Topic: New types of numbers
Replies: 38
Views: 6352

Re: New types of numbers

Gaps? I thought [ the surreals ] were the largest possible ordered field. How can you have gaps in that? For example, there is a "gap" between the finite surreals (surreals bounded by two real numbers) and the positive infiinite surreals. Or, for example, between the surreals smaller than...
by Proginoskes
Sat Jan 14, 2012 8:44 pm UTC
Forum: Religious Wars
Topic: The Rise and Fall of Programming Languages in 2011
Replies: 20
Views: 8999

Re: The Rise and Fall of Programming Languages in 2011

Interesting that C++ took a nosedive around 2005 ... That was about when some of the standards were changed (including the addition of namespaces). And I'm surprised that Perl isn't more popular; it's powerful because every algorithm has been programmed in it. About the only thing missing is: print ...

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