Search found 152 matches

by Farabor
Mon Sep 10, 2018 5:10 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 2042: "Rolle's Theorem"
Replies: 86
Views: 8317

Re: 2042: "Rolle's Theorem"

A far more egregious example of this is DeMorgan's Laws. Not only are these obvious, they are trivial to prove and have been known forever. It's like naming the exponent property (a b ) c = a bc "Eebster's Law." You'd think so, but it turns out there's a subtle use of the law of the exclu...
by Farabor
Tue Aug 07, 2018 2:07 am UTC
Forum: Individual XKCD Comic Threads
Topic: 2029: "Disaster Movie"
Replies: 21
Views: 3036

Re: 2029: "Disaster Movie"

Archaologists: http://www.bbc.co.uk/staticarchive/8351546107a5b71114adc3725b1d4c2316a25f2b.jpg vs https://www.sideshowtoy.com/wp-content/uploads/2018/04/tomb-raider-lara-croft-statue-gaming-heads-silo-903481.png …and… http://www.thenorthernecho.co.uk/resources/images/965386/?type=responsive-gallery...
by Farabor
Mon Jul 09, 2018 6:16 am UTC
Forum: Individual XKCD Comic Threads
Topic: 2016: "OEIS Submissions"
Replies: 31
Views: 6097

Re: 2016: "OEIS Submissions"

The OEIS existed before Reddit made this kind of thing cool, though. According to the OEIS web site, it was founded in 1964... Although I have trouble reconciling that date with the "On-Line" part of OEIS, since that's five years before ARPANET. If you dig a bit deeper, you'll find it was...
by Farabor
Thu May 31, 2018 3:47 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1039: "RuBisCO"
Replies: 122
Views: 35752

Re: 1039: "RuBisCO"

Time to necrothread...

Is it wrong for me to want to edit https://en.wikipedia.org/wiki/RuBisCO to put a "References in popular culture" section, linking it to the xkcd?
by Farabor
Tue Dec 12, 2017 12:24 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1927: "Tinder"
Replies: 18
Views: 3116

Re: 1927: "Tinder"

LTRs are useful in dating retroviral insertions. I don't actually know how many retriviral insertions found each other on Tinder, but I assume some of them did! LTRs are useful in dating retroviral insertions. I don't actually know how many retriviral insertions found each other on Tinder, but I as...
by Farabor
Thu Oct 19, 2017 4:06 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1904: Research Risks
Replies: 62
Views: 7454

Re: 1904: Research Risks

Heimhenge wrote:
Just sayin' ... I've seen better Randall graphs.


I think that this viewpoint would be better justified with an appropriate illustration of the relative data points in question, perhaps in graph format?
by Farabor
Mon Sep 25, 2017 6:59 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1894: "Real Estate"
Replies: 28
Views: 4055

Re: 1894: "Real Estate"

"Thing" units are fine for smaller items, but when dealing with amounts that you will probably finance, it's best to convert money units into time units. "years of salary", "years of net savings", "years of working a second job"... stuff like that. Of course ...
by Farabor
Mon Sep 18, 2017 5:30 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1891: "Obsolete Technology"
Replies: 63
Views: 9340

Re: 1891: "New Technology"

If it ain't broke, don't fix it. If it is broke, fix it only as much as is necessary. Unfortunately, this attitude can lead to situations where people are complacent and don't realize that something actually is broken, but not in an obvious way. Case in point: Light bulbs. For their primary functio...
by Farabor
Mon Aug 28, 2017 7:41 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1882: "Color Models"
Replies: 81
Views: 11456

Re: 1882: "Color Models"

I can't believe we're this far in without anyone mentioning https://blog.xkcd.com/2010/05/03/color-survey-results/
by Farabor
Mon Nov 21, 2016 9:22 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1761: "Blame"
Replies: 138
Views: 26313

Re: 1761: "Blame"

Alice and Bob are nominally friends. Alice is always a super nice person who doesn't do anything to attack or hurt people. Bob thus far hasn't really done much of exceptional note against Alice, so Alice, nice person that she is, is friendly with Bob. Then one day Bob reveals himself to be a jackas...
by Farabor
Tue Nov 08, 2016 1:51 am UTC
Forum: General
Topic: How long has this been on xkcd comics?
Replies: 3
Views: 2843

How long has this been on xkcd comics?

So I just noticed this at the bottom of today's xkcd...so I went back and looked at others. Has it always been there and I never noticed, or is it something that is new(ish)? xkcd.com is best viewed with Netscape Navigator 4.0 or below on a Pentium 3±1 emulated in Javascript on an Apple IIGS at a sc...
by Farabor
Sat Nov 05, 2016 3:51 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1755: "Old Days"
Replies: 37
Views: 6845

Re: 1755: "Old Days"

And of course, this brings to mind an old Frank Hayes classic, this rendition by Tom Smith: https://tomsmith.bandcamp.com/track/when-i-was-a-boy
by Farabor
Tue Oct 25, 2016 2:43 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1750: "Life Goals"
Replies: 47
Views: 9651

Re: 1750: "Life Goals"

ganof wrote:Apparently I'm not the only one https://www.google.ca/trends/explore?q=zymurgy


Hmm, any clue what caused/correlated that spike in the week of April 10-16 when it went up to 100?
by Farabor
Tue Oct 25, 2016 2:41 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1750: "Life Goals"
Replies: 47
Views: 9651

Re: 1750: "Life Goals"

Ah, syzygy. That was always my go-to word in Hangman. It covers my two favorite things: astronomy and completely taking the fun out of every game I play. Have not been punched yet. Damn you, I did a literal spit take at computer I'm sitting at monitoring my class take a lab at this.....fortunately ...
by Farabor
Wed Oct 12, 2016 12:05 am UTC
Forum: Mathematics
Topic: Math Books
Replies: 378
Views: 249386

Re: Math Books-Banach Lattices

I'm trying to learn about Banach Lattices (Riesz spaces which are Banach Spaces). The textbook my professor gave me to work from is Peter Meyer-Nieberg's "Banach Lattices", 1st edition, 1991. I'm finding it extremely dense/hard to follow. (I didn't have any problem with Kreyszig's Introduc...
by Farabor
Sat Oct 08, 2016 11:29 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1743: "Coffee"
Replies: 77
Views: 14164

Re: 1743: "Coffee"

I'm on episode 11 of Luke Cage, so I thought this title might refer to something COMPLETELY different....
by Farabor
Fri Sep 02, 2016 9:30 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1727: "Number of Computers"
Replies: 35
Views: 7237

Re: 1727: "Number of Computers"

Pfhorrest wrote:
Farabor wrote:Growing up, I naively thought we'd just use the sun for that.

Turns out it's actually easier to hurl things into Jupiter than it is the sun.


So I learned later in life, thus the 'naively' part of the original statement :)
by Farabor
Wed Aug 31, 2016 6:19 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1727: "Number of Computers"
Replies: 35
Views: 7237

Re: 1727: "Number of Computers"

bondsbw wrote:I'm beginning to suspect that using Jupiter as a general waste management strategy may not be as efficient as they said it would be.


Growing up, I naively thought we'd just use the sun for that.
by Farabor
Mon Jul 11, 2016 11:46 pm UTC
Forum: What If?
Topic: What-If 0150: "Tatooine Rainbow"
Replies: 52
Views: 34625

Re: What-If 0150: "Tatooine Rainbow"

Great. Now all we have to do is to get it to rain on Tatooine. In the Earthly Tataouine in Tunisia where that part of Star Wars was shot the annual rainfall averages 134 mm. This is nothing like as dry as the Atacama Desert in Chile, with an average rainfall of 15 mm per year. Some locations there ...
by Farabor
Tue Jun 28, 2016 6:35 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1699: "Local News"
Replies: 27
Views: 6214

Re: 1699: "Local News"

City Council elections? Pah! We've just had a referendum to set government policy and apparently accidently triggered the Rapture. I thought the whole point of the thing was to throw Westminster into complete chaos with no tenable candidates for Prime Minister so that HM would ask Larry the Downing...
by Farabor
Wed Apr 13, 2016 5:12 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1667: "Algorithms"
Replies: 49
Views: 10740

Re: 1667: "Algorithms"

I have a compsci friend who's often griped about people misusing excel for things that it's not suited for :)
by Farabor
Thu Mar 10, 2016 5:25 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1653: "United States Map"
Replies: 106
Views: 18090

Re: 1653: "United States Map"

Is it wrong that the first thing I thought of was to search for fixed points, before I realized that the translation function wasn't continuous and therefore Brouwer's FIxed Point theorem doesn't apply? On the "land noone wants", in slightly fictional lands, there was the reason for Pennsi...
by Farabor
Fri Nov 13, 2015 5:09 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1602: Linguistics Club
Replies: 117
Views: 22860

Re: 1602: Linguistics Club

Sadly, there's actually a semi-common use of the sesqui- prefix in my line of work: Sesquilinear forms, which are linear in the first component and conjugate linear in the second. Go figure!
by Farabor
Wed Sep 16, 2015 10:23 pm UTC
Forum: Science
Topic: Europeans traveling to the Americas in history: Diseases?
Replies: 9
Views: 2271

Europeans traveling to the Americas in history: Diseases?

So, I was listening to NPR today talk about the canonization of a spanish missionary to the new world, and they brought up the topic of all of the natives killed by European diseases that they had no resistances built up to. Strangely enough, today was the first time I wondered about the symmetric s...
by Farabor
Tue Dec 09, 2014 4:27 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1457:"Feedback"
Replies: 23
Views: 7630

Re: 1457:"Feedback"

You place it, however it needs to be orientated, in the window. After that, no touchie! Tethering is now your best friend. You're assuming the router is orientable...... (Okay, I've been doing too much topology lately. Anyone want the first homotophy group of a sphere adjoined to a circle by a sing...
by Farabor
Mon Nov 10, 2014 1:50 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1445: "Efficiency"
Replies: 40
Views: 11717

Re: 1445: "Efficiency"

http://imgs.xkcd.com/comics/efficiency.png Title Text: I need an extension for my research project because I spent all month trying to figure out whether learning Dvorak would help me type it faster. The fact that stategies A and B are equally worthwhile reminded me of Buridan's ass . This is the f...
by Farabor
Mon Oct 13, 2014 4:28 pm UTC
Forum: Mathematics
Topic: Question about 1+2+3+4...=-1/12 (please hear me out)
Replies: 24
Views: 6247

Re: Question about 1+2+3+4...=-1/12 (please hear me out)

To turn the question around on you....what value would making this definition have? Anytime we add a definition to something, we generally do it because it is useful/leads to greater insights/etc. Regardless on the methodology, this 'result' seems to be valueless.
by Farabor
Mon Oct 06, 2014 10:43 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1430: "Proteins"
Replies: 81
Views: 15571

Re: 1430: Proteins

Anyone up to explaining the alt text to those of us who are biology and/or origami impaired?
by Farabor
Tue Sep 09, 2014 2:30 am UTC
Forum: Mathematics
Topic: (homework) Finite additivity problem
Replies: 2
Views: 1829

Re: (homework) Finite additivity problem *Solved, thanks*

Doh, that's it exactly! Thanks.
by Farabor
Tue Sep 09, 2014 1:14 am UTC
Forum: Mathematics
Topic: (homework) Finite additivity problem
Replies: 2
Views: 1829

(homework) Finite additivity problem

This is for a graduate level mathematical probability course. So, to make my life easier, I'm going to Romanize all the greek letters here. Starting with a countably infinite set X, take the collection F of all subsets A of X such that either A or A-complement is finite. We define a set function P(E...
by Farabor
Wed Sep 03, 2014 2:13 am UTC
Forum: Language/Linguistics
Topic: What is the incorrect answer to this question?
Replies: 8
Views: 4669

Re: What is the incorrect answer to this question?

My advice for a reference on this and many other beautiful concepts is a book everyone should read: Gödel, Escher, Bach: An Eternal Golden Braid." Go get it, now. It addresses, amongst other things, paradoxes and self reference quite well.

(On a side note, I love the Gödel filter here!)
by Farabor
Tue Sep 02, 2014 11:30 am UTC
Forum: Mathematics
Topic: Is there a notation for unit vectors?
Replies: 6
Views: 2341

Re: Is there a notation for unit vectors?

Flumble wrote:
Luckily, with math, everything is defineable:


Oh really? http://en.wikipedia.org/wiki/Definable_real_number
*whistle*
by Farabor
Fri Aug 29, 2014 9:40 pm UTC
Forum: Mathematics
Topic: isotonic vs monotonic?
Replies: 2
Views: 2228

isotonic vs monotonic?

I just encountered a professor using the term 'isotonic' in class. From my brief forays online, it seems to be either the exact same as monotonic, or something very close to it. Is there any difference in these terms?
by Farabor
Fri Aug 29, 2014 3:25 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1414: "Writing Skills"
Replies: 86
Views: 17959

Re: 1414: "Writing Skills"

Malcolm Gladwell talks about the 10,000-hour rule in his book "Outliers." (Ten thousand hours of practice doing something makes it more than likely you'll be a virtuoso at that thing.) The question is, are kids today virtuosos at writing or at writing poorly? Hmm. . Disregarding the sourc...
by Farabor
Fri Aug 29, 2014 3:17 pm UTC
Forum: Mathematics
Topic: Irrational to the irrational=rational
Replies: 5
Views: 2339

Re: Irrational to the irrational=rational

I'm glad I posted this, as the discussion above has proved useful and interesting!
Spoiler:
Yes, the one I was thinking of was the square root of 2 one.
by Farabor
Thu Aug 28, 2014 1:40 am UTC
Forum: Mathematics
Topic: Irrational to the irrational=rational
Replies: 5
Views: 2339

Irrational to the irrational=rational

I don't know if this is a well known result or not, but someone just showed me a neat, simple proof of the existence of two irrational real numbers x and y such that x^y is rational. Thought I'd share the question here for those who might not have seen it to try it out. As an existence proof, it of ...
by Farabor
Mon Jun 23, 2014 3:50 am UTC
Forum: Mathematics
Topic: The Most Important Math
Replies: 48
Views: 18579

Re: The Most Important Math

The answer is clearly logic. Proof: Every argument in this thread uses logic to justify its truth. Thus logic is the essential underpinning of everything :) I'm with Farabor. Math is based on the idea that logic is... well, logical. E.g. axioms in any field of mathematics are statements that are co...
by Farabor
Sat Jun 21, 2014 12:39 am UTC
Forum: Mathematics
Topic: The Most Important Math
Replies: 48
Views: 18579

Re: The Most Important Math

The answer is clearly logic. Proof: Every argument in this thread uses logic to justify its truth. Thus logic is the essential underpinning of everything :)
by Farabor
Fri Jun 13, 2014 10:24 pm UTC
Forum: School
Topic: Title for grad student teaching a class?
Replies: 16
Views: 13415

Title for grad student teaching a class?

Well, I'm a Graduate Teaching Assistant in mathematics at my local university. Starting in the fall I'll be teaching a course full time. I'm caught debating what to have the students call me. Mr.? Professor? First name?
by Farabor
Wed May 28, 2014 10:50 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1374: "Urn"
Replies: 91
Views: 16605

Re: 1374: "Urn"

orthogon wrote:What's an imaginary urn?


A real urn times i, of course.

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