Search found 3030 matches

by Qaanol
Mon Apr 17, 2017 11:06 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1825: "7 Eleven"
Replies: 71
Views: 2630

Re: 1825: "7 Eleven"

Shenguin wrote:
Really, the only honest 24-hour stores are the ones in places like Arizona and Hawaii (sic), and many of them are still wrong in certain years


Why Arizona and Hawaii? I am missing something about the alt text.


DST.

Why did OP add “(sic)” though? The spelling is correct.
by Qaanol
Mon Mar 27, 2017 9:05 pm UTC
Forum: Science
Topic: Is terraforming Uranus and Neptune possible?
Replies: 18
Views: 764

Re: Is terraforming Uranus and Neptune possible?

What happens to all the gas that gets blasted out of Uranus? Assuming there is solid land underneath, to make it habitable will we have to irrigate Uranus? And at that distance from the sun there is hardly any light, so why would anyone want to live on the cold, dark surface of Uranus? Even if it be...
by Qaanol
Mon Mar 27, 2017 5:03 pm UTC
Forum: Mathematics
Topic: Math: Fleeting Thoughts
Replies: 377
Views: 89433

Re: Math: Fleeting Thoughts

One degree is approximately 1.75 percent
by Qaanol
Tue Mar 21, 2017 9:25 pm UTC
Forum: Religious Wars
Topic: Is 0 a natural number?
Replies: 35
Views: 10912

Re: Is 0 a natural number?

Derek wrote:
Xenomortis wrote:And don't forget about the Fourier Transform.

Now I'm wondering if there is an algorithm to find the fouriest base for a given number that is better than a linear search.

How about base (1 - 4/n)?
by Qaanol
Mon Mar 20, 2017 4:10 pm UTC
Forum: Mathematics
Topic: An annoying derivative
Replies: 3
Views: 901

Re: An annoying derivative

Thanks, I ended up using L’Hôpital’s rule with respect to t, and the fact that the limit of a product is the product of the limits.

I’m not quite sure your approach works, since t′(1) = ∞.
by Qaanol
Thu Mar 16, 2017 6:16 pm UTC
Forum: Serious Business
Topic: Stress Test for a Proposed Electoral System
Replies: 14
Views: 1435

Re: Stress Test for a Proposed Electoral System

The link is http://localpr.ca/details/. I haven’t read it yet though.
by Qaanol
Wed Mar 15, 2017 7:08 pm UTC
Forum: Science
Topic: is projectile motion 3 dimensional or 2 dimensional?
Replies: 10
Views: 746

Re: is projectile motion 3 dimensional or 2 dimensional?

Pretty sure it’s one-dimensional, though depending on your universe that 1D path may be embedded in some other topology.
by Qaanol
Wed Mar 15, 2017 7:05 pm UTC
Forum: Serious Business
Topic: Stress Test for a Proposed Electoral System
Replies: 14
Views: 1435

Re: Stress Test for a Proposed Electoral System

I’m interested in voting reform and I’d like to take a look.

You can post a link after you’ve made, I believe, 5 posts on the forum.
by Qaanol
Thu Mar 09, 2017 1:09 am UTC
Forum: News & Articles
Topic: Wikileaks Releases CIA Hacking Secrets
Replies: 21
Views: 2183

Re: Wikileaks Releases CIA Hacking Secrets

In the interest of the security of our nation and its people, the right thing for these agencies to do is obviously to locate vulnerabilities in digital systems, and then *immediately and proactively* work with companies to fix them. Any weakness, any security hole, is a bad thing for everyone who u...
by Qaanol
Wed Mar 08, 2017 2:11 am UTC
Forum: XKCD Meetups
Topic: Maine
Replies: 8
Views: 6555

Re: Maine

Southern inland, though I get into Portland every now and again
by Qaanol
Sun Feb 26, 2017 10:07 pm UTC
Forum: Mathematics
Topic: An annoying derivative
Replies: 3
Views: 901

An annoying derivative

I’m trying to take the derivative of a messy function at x=1. I’m pretty sure that y′(1) = 1, but I’m having a world of difficulty proving it. Here’s the setup: t(x) = (2/π) · arcsin( (2/π) · ( arcsin(x) + x · √(1 - x²) ) ) y(x) = t · √(1 - t²) + x · (1 - √(1 - t²)) Now, I’m reasonably confident tha...
by Qaanol
Sat Feb 25, 2017 9:18 pm UTC
Forum: XKCD Meetups
Topic: Maine
Replies: 8
Views: 6555

Re: Maine

I’m in Maine full-time nowadays.
by Qaanol
Sat Feb 11, 2017 2:42 am UTC
Forum: Religious Wars
Topic: Mollweide v. Hammer (map projections)
Replies: 13
Views: 7491

Re: Mollweide v. Hammer (map projections)

somitomi wrote:I'm now considering making a large print of several of these for my wall.

I can make them higher-res if you want.
by Qaanol
Sun Feb 05, 2017 9:14 pm UTC
Forum: Religious Wars
Topic: Mollweide v. Hammer (map projections)
Replies: 13
Views: 7491

Re: Mollweide v. Hammer (map projections)

I like these rotated maps, there's something about them being kind of familiar but strange at the same time. Thanks, glad you like them! Here are a few more I found in my stash: Diagonal 1 (aka. “Split Central America”) https://dl.dropboxusercontent.com/u/6765174/forums/xkcd/qaanol/mapprojection/Mo...
by Qaanol
Sat Jan 21, 2017 6:54 pm UTC
Forum: Serious Business
Topic: Education, from N&A
Replies: 34
Views: 2241

Re: Education, from N&A

Calculus should be taught in middle school. If elementary school is not teaching students sufficient geometry and arithmetic-with-letters to tackle the calculus of one variable by age 12, then that elementary school curriculum is a mathematical failure. Obviously some students are slower learners an...
by Qaanol
Fri Jan 06, 2017 5:11 pm UTC
Forum: Coding
Topic: Coding: Fleeting Thoughts
Replies: 9603
Views: 1368234

Re: Coding: Fleeting Thoughts

The important thing to remember, as said above, is that floats are not random. They don't produce weird results "just because". They're a base-2 value, with a movable "window" of precision. As a base-2 value, they can only represent values divisible by a power of 2. This is larg...
by Qaanol
Fri Dec 30, 2016 5:31 am UTC
Forum: News & Articles
Topic: 2016 US Presidential Election
Replies: 8482
Views: 487664

Re: 2016 US Presidential Election

My understanding is that Wikileaks is claiming that their info from the DNC is not a hack, but an actual leak from an insider. I might be wrong, though. I think they've been cagey about where they got it, specifically denying Russia gave it to them. They have been cagey in not naming Seth Rich dire...
by Qaanol
Sat Dec 03, 2016 4:52 am UTC
Forum: Coding
Topic: Coding: Fleeting Thoughts
Replies: 9603
Views: 1368234

Re: Coding: Fleeting Thoughts

Yakk wrote:It would be easier to just solve Halt.

Every program terminates, even the ones with unconditional loops.

You are welcome.
by Qaanol
Thu Nov 17, 2016 4:33 pm UTC
Forum: News & Articles
Topic: 2016 US Presidential Election
Replies: 8482
Views: 487664

Re: 2016 US Presidential Election

Sanders ended up being a spoiler for the youth vote. Not by getting tons of write-ins, but by driving away disillusioned young people. Clinton's share of the youth vote dropped twelve percent from 2008 Obama, not because Trump won a larger raw number than previous Republicans, but because liberal y...
by Qaanol
Tue Nov 01, 2016 6:09 am UTC
Forum: Coding
Topic: Algorithm / library for *almost* linear programming?
Replies: 4
Views: 1850

Re: Algorithm / library for *almost* linear programming?

I ended up implementing the Lemke-Howson algorithm for linear complementarity as described here . That paper describes both the method and how to solve quadratic programs with it. To move variables in and out of the basis, I adapted the pivoting formulas from here . I also applied a preliminary subs...
by Qaanol
Tue Nov 01, 2016 1:23 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1753: "Thumb War"
Replies: 16
Views: 2486

Re: 1753: "Thumb War"

I’m just here for the pronunciation of “twenty”.
by Qaanol
Mon Oct 17, 2016 9:25 pm UTC
Forum: News & Articles
Topic: 2016 US Presidential Election
Replies: 8482
Views: 487664

Re: 2016 US Presidential Election

Let me put it this way, if Clinton was half as horrible as Trump, she wouldn't have been the nominee because she is held to a much higher standard. The only standard I see Hillary Clinton being held to is “Not being Donald Trump”. Well that and the standard of, “She was ‘extremely careless’ with cl...
by Qaanol
Mon Oct 17, 2016 8:20 pm UTC
Forum: News & Articles
Topic: 2016 US Presidential Election
Replies: 8482
Views: 487664

Re: 2016 US Presidential Election

One could fairly argue that Trump is also not an appropriate person for these responsibilities, of course. Absolutely. I want to be abundantly clear that I think Trump is entirely unqualified for the Oval Office. I have been posting information which illustrates how flawed Hillary Clinton is, becau...
by Qaanol
Mon Oct 17, 2016 6:57 pm UTC
Forum: News & Articles
Topic: 2016 US Presidential Election
Replies: 8482
Views: 487664

Re: 2016 US Presidential Election

Thesh wrote:So are you going to post the full excerpt so we can see it in context, or do you expect us to go through 100 pages of an unsearchable PDF to find it?

It’s on pp. 25–26. The previous excerpts I posted are from pp. 43–45.
by Qaanol
Mon Oct 17, 2016 6:30 pm UTC
Forum: News & Articles
Topic: 2016 US Presidential Election
Replies: 8482
Views: 487664

Re: 2016 US Presidential Election

Another excerpt from part 4 of the FBI documents . State Department pressuring FBI agents to change the classification level of Hillary Clinton’s emails prior to their release: [________] email enclosed copies of 5 email communications from former Secretary of State Hillary Clinton’s private email a...
by Qaanol
Mon Oct 17, 2016 4:37 pm UTC
Forum: News & Articles
Topic: 2016 US Presidential Election
Replies: 8482
Views: 487664

Re: 2016 US Presidential Election

The FBI released some documents on Hillary Clinton . I have not read them all, but here are a few excerpts from Part 4: Disregarding protocol: [________] described a “stark difference” between Rice and Clinton with regard to obedience to security and diplomatic protocols. Rice observed strict adher...
by Qaanol
Mon Oct 17, 2016 4:01 am UTC
Forum: News & Articles
Topic: 2016 US Presidential Election
Replies: 8482
Views: 487664

Re: 2016 US Presidential Election

A study by researchers at Stanford University and Tilburg University looked at the 2016 Democratic primary and found substantial evidence that the results were rigged. Specifically: • States without verifiable paper trails for votes gave Clinton a far higher proportion of their delegates, even afte...
by Qaanol
Sun Oct 16, 2016 2:13 pm UTC
Forum: Mathematics
Topic: Proving angles are equal in a triangle in a circle.
Replies: 15
Views: 1545

Re: Proving angles are equal in a triangle in a circle.

The problem is asking you to prove that two lengths are equal.

Is this homework?
by Qaanol
Fri Oct 14, 2016 8:58 pm UTC
Forum: News & Articles
Topic: 2016 US Presidential Election
Replies: 8482
Views: 487664

Re: 2016 US Presidential Election

And since you ignored this point, let me ask once again: why do you think playing this long-term spoiler game has a more realistic chance of bringing about a better society than the idea of campaigning for electoral reform, campaign finance reform and lower-level third party candidates while pragma...
by Qaanol
Fri Oct 14, 2016 3:45 pm UTC
Forum: News & Articles
Topic: 2016 US Presidential Election
Replies: 8482
Views: 487664

Re: 2016 US Presidential Election

The Presidential vote isn't where you should be voting to make change happen. The numbers aren't there to affect change by voting third party, and the Big Two can safely ignore your input at the ballot box (which they have done and will continue to do). Well if they really don’t want my vote, then ...
by Qaanol
Fri Oct 14, 2016 5:54 am UTC
Forum: News & Articles
Topic: 2016 US Presidential Election
Replies: 8482
Views: 487664

Re: 2016 US Presidential Election

All so you can maintain your sense of moral purity when the fire is, by your own admission, a thousand times worse than it could have been. What you've articulated is an atrocious point of view. Actually, the fire is *infinitely* worse than it could have been, because we could have put it out by no...
by Qaanol
Fri Oct 14, 2016 5:11 am UTC
Forum: News & Articles
Topic: 2016 US Presidential Election
Replies: 8482
Views: 487664

Re: 2016 US Presidential Election

Why should I court your vote when you're so intent on throwing it away? <spends six more paragraphs using fear tactics to try influencing my vote> You sure are putting a lot of effort into it, for someone who claims not to care about my vote. And partisans do it far more than you, which tells me th...
by Qaanol
Fri Oct 14, 2016 2:46 am UTC
Forum: News & Articles
Topic: 2016 US Presidential Election
Replies: 8482
Views: 487664

Re: 2016 US Presidential Election

All 3rd party protest votes will be blamed for "spoiling" this election, just as Al Gore blamed Ralf Nader or Bush (Sr.) blamed Ross Perot. I welcome their blame. Suppose the blamers are correct. That means I (and people like me) have the power to decide which of the two entrenched establ...
by Qaanol
Fri Oct 14, 2016 1:36 am UTC
Forum: News & Articles
Topic: 2016 US Presidential Election
Replies: 8482
Views: 487664

Re: 2016 US Presidential Election

Izawwlgood wrote:Argh, why are people STILL debating the merits of a third party vote? Aren't we past that nonsense?

Yeah seriously.

Voting for a terrible candidate is a terrible idea.

Voting for a good candidate is a good idea.

It doesn’t get more obvious than that.
by Qaanol
Fri Sep 30, 2016 7:31 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1740: "Rosetta"
Replies: 35
Views: 3393

Re: 1740: "Rosetta"

That dot inside the “J” though…
by Qaanol
Mon Sep 12, 2016 6:10 pm UTC
Forum: Coding
Topic: Algorithm / library for *almost* linear programming?
Replies: 4
Views: 1850

Re: Algorithm / library for *almost* linear programming?

Yeah I can’t use Matlab since I want to be able to distribute my program to other people. The Python libraries look good, but I don’t know how to call them from Swift without embedding an entire Python interpreter in my project. From what I’ve read, it looks like an active-set method should do what ...
by Qaanol
Fri Sep 09, 2016 12:15 am UTC
Forum: Mathematics
Topic: Need help with least-squares linear-constraint optimization
Replies: 0
Views: 3411

Need help with least-squares linear-constraint optimization

Given a square skew-symmetric matrix M, I need to find the vector x with minimal magnitude satisfying M x ≤ 0 and x i ≥ 0 and ∑x i = 1. Or to put it another way, the goal is to minimize f( x ) = ½∑x i 2 subject to h( x ) = 1 • x - 1 = 0 and g k ( x ) = m k • x ≤ 0 where m k is the kth row of M, as w...
by Qaanol
Wed Sep 07, 2016 6:59 pm UTC
Forum: Coding
Topic: Algorithm / library for *almost* linear programming?
Replies: 4
Views: 1850

Algorithm / library for *almost* linear programming?

I have a little hobby project where I need to find an optimal strategy for a (symmetric, zero-sum) matrix game. That part is straightforward, I implemented the simplex algorithm as described in §4.5 of this paper (PDF) . However if more than one strategy is optimal, I need to select the optimal stra...
by Qaanol
Fri Sep 02, 2016 2:14 am UTC
Forum: Coding
Topic: Should matrices be row-major or column-major?
Replies: 4
Views: 1842

Should matrices be row-major or column-major?

Should 2-dimensional matrices be stored in row-major or column-major order? There does not seem to be any consensus among languages and libraries: Row-major order is used in C/C++/Objective-C (for C-style arrays), Mathematica, PL/I, Pascal, Speakeasy, SAS, and C#/CLI/.Net. Column-major order is used...

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