explain xkcd - User contributions [en]

Talk:217: e to the pi Minus pi

2016-08-22T19:59:01Z

141.101.93.49:

Asserting that the programmers' algorithms truncated to three decimal digits is an unsupported and unnecessary extrapolation. Most floating-point implementations use binary, not decimal, and 19.999099979 ''looks'' very much like a rounding error in binary floating-point that has accumulated over several operations. [[User:Daddy|Daddy]] ([[User talk:Daddy|talk]]) 12:39, 29 April 2013 (UTC)
:Fixed. [[User:Xhfz|Xhfz]] ([[User talk:Xhfz|talk]]) 22:57, 16 August 2013 (UTC)

The third bullet-point above needs changing... (9^2+(19^2/22))=97.4090909091 which is close to pi to the fourth power, so it should be (as noted in the text) (9^2+(19^2/22))^1/4 [[User:Squirreltape|Squirreltape]] ([[User talk:Squirreltape|talk]]) 19:27, 25 February 2014 (UTC)
:Actually, in-case you didn't notice, it says "∜(9² + 19²/22)", not just the sum on its own. I checked the sum on my calculator, and it is equal to what the page is saying. "∜(9² + 19²/22)" means "4th root of (9^2+19^2/22)" (What the title text is saying), or on Windows Calculator, "(9^2+19^2/22) yroot(4)" (Basically what the sum is saying). So, the 3rd bullet point is correct. --[[User:Katavschi|Katavschi]] ([[User talk:Katavschi|talk]]) 22:48, 23 April 2014 (UTC)

It says above that (π + 20)^i ≈ -i, but this should be (π + 20)^i ≈ -1. Proof: π + 20 ≈ e^π => (π + 20)^i ≈ (e^π)^i = e^(πi) = -1.

The ACM competitions are famous for being under tight time pressure. Making your own team waste time would absolutely get you kicked out (and make enemies) [[User:Danshoham|Mountain Hikes]] ([[User talk:Danshoham|talk]]) 04:40, 23 September 2015 (UTC)

;"If they thought about the mathematics"

hm, are you saying it is obvious that e^ pi - pi is not 20? How would you know without approximating it? The sum of two irrationals is not necessarily irrational. [[Special:Contributions/162.158.34.194|162.158.34.194]] 01:58, 26 October 2015 (UTC)
:approximate e^pi using slightly bigger numbers than e and pi (say e: 2.7183 and pi: 3.1416) and subtract a value that is slightly smaller than pi (say 3.1415). The result is less than 20 and a upper limit for e^pi - pi [[Special:Contributions/141.101.93.49|141.101.93.49]] 19:59, 22 August 2016 (UTC)

Talk:1696: AI Research

2016-06-20T09:06:13Z

141.101.93.49:

I'm Australian an I don't know about the "updog" Thing, just sayin' [[Special:Contributions/162.158.2.139|162.158.2.139]] 05:15, 20 June 2016 (UTC)

"What's up, Doc?" made me think of Bugs Bunny cartoons. [[User:Ehusmark|EHusmark]] ([[User talk:Ehusmark|talk]]) 07:19, 20 June 2016 (UTC)

I'm British and I haven't heard of "updog" either. [[Special:Contributions/141.101.98.18|141.101.98.18]] 08:29, 20 June 2016 (UTC)

Never heard of that in the two years that I lived in England and South Wales. [[Special:Contributions/141.101.93.49|141.101.93.49]] 09:06, 20 June 2016 (UTC)

Talk:1073: Weekend

2016-04-18T14:19:16Z

141.101.93.49: /* Missed Source */ new section

I usually start spewing this kind of nonsense when I lose track of what I'm saying in a speech. Who needs scripts? '''[[User:Davidy22|Davidy22]]'''[[User talk:Davidy22|<tt>[talk]</tt>]] 13:35, 8 January 2013 (UTC)

Since I am not well read regarding James Garfield's speeches perhaps this is an effort to point out that James Garfield's speeches were less compelling than the desire to avoid Monday's and how lasagna makes everything better.?[[Special:Contributions/66.88.136.254|66.88.136.254]] 20:10, 12 March 2013 (UTC)

How can you make the statement "abolish the work week entirely, the economy would collapse within twenty four hours." This is unsupported by any kind of evidence. Many countries don't have a 40 hour work week, and it is becoming rarer in the US as well. Even if everyone stopped working tomorrow, it wouldn't collapse the system because it would be like a holiday. Are you assuming the abolition of the work week would mean no one works, or that it would be replaced by an inferior system that collapses the economy? Neither seems rather realistic. [[Special:Contributions/63.149.29.1|63.149.29.1]] 21:15, 11 October 2013 (UTC) Robert

== Missed Source ==

Hi There,
I just went random on xkcd and noted that one first time...
But I know the concept from a book: Sam Small flies again by https://en.wikipedia.org/wiki/Eric_Knight ... One of the stories is about Sam Small deciding that it is now Saturday... on and on and on... Funny story, should not miss here...[[Special:Contributions/141.101.93.49|141.101.93.49]] 14:19, 18 April 2016 (UTC)