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Groups > comp.lang.python > #70682 > unrolled thread

Significant digits in a float?

Started byRoy Smith <roy@panix.com>
First post2014-04-28 12:00 -0400
Last post2014-04-30 18:18 +0000
Articles 20 on this page of 78 — 23 participants

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  Significant digits in a float? Roy Smith <roy@panix.com> - 2014-04-28 12:00 -0400
    Re: Significant digits in a float? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-04-29 02:34 +0000
      Re: Significant digits in a float? Ben Finney <ben@benfinney.id.au> - 2014-04-29 13:23 +1000
        Re: Significant digits in a float? Steven D'Aprano <steve@pearwood.info> - 2014-04-29 05:43 +0000
          Re: Significant digits in a float? Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2014-04-29 20:33 -0400
            Re: Significant digits in a float? Roy Smith <roy@panix.com> - 2014-04-29 20:42 -0400
              Re: Significant digits in a float? Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2014-04-30 20:02 -0400
                Re: Significant digits in a float? Mark H Harris <harrismh777@gmail.com> - 2014-04-30 22:54 -0500
                  Re: Significant digits in a float? Paul Rubin <no.email@nospam.invalid> - 2014-04-30 20:56 -0700
                    Re: Significant digits in a float? Mark H Harris <harrismh777@gmail.com> - 2014-04-30 23:16 -0500
                      Re: Significant digits in a float? William Ray Wing <wrw@mac.com> - 2014-05-01 11:53 -0400
                        Re: Significant digits in a float? Mark H Harris <harrismh777@gmail.com> - 2014-05-06 11:29 -0500
                      Re: Significant digits in a float? Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2014-05-01 22:06 -0400
                        Re: Significant digits in a float? Mark H Harris <harrismh777@gmail.com> - 2014-05-06 09:51 -0500
                          Re: Significant digits in a float? alister <alister.nospam.ware@ntlworld.com> - 2014-05-06 15:18 +0000
                            Re: Significant digits in a float? Joel Goldstick <joel.goldstick@gmail.com> - 2014-05-06 12:14 -0400
                          Re: Significant digits in a float? Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2014-05-06 19:48 -0400
                  Re: Significant digits in a float? Roy Smith <roy@panix.com> - 2014-05-01 08:56 -0400
                    Re: Significant digits in a float? Larry Hudson <orgnut@yahoo.com> - 2014-05-01 12:51 -0700
                      Re: Significant digits in a float? Adam Funk <a24061@ducksburg.com> - 2014-05-01 22:05 +0100
                  Re: Significant digits in a float? Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2014-05-01 21:47 -0400
                    Re: Significant digits in a float? Mark H Harris <harrismh777@gmail.com> - 2014-05-06 09:59 -0500
                      [OT] Silde rules [was Re: Significant digits in a float?] Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-05-06 16:10 +0000
                        Re: [OT] Silde rules Ben Finney <ben@benfinney.id.au> - 2014-05-07 10:01 +1000
                Re: Significant digits in a float? Adam Funk <a24061@ducksburg.com> - 2014-05-01 21:55 +0100
                  Re: Significant digits in a float? Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2014-05-01 22:26 -0400
                    Re: Significant digits in a float? Adam Funk <a24061@ducksburg.com> - 2014-05-08 20:58 +0100
      Re: Significant digits in a float? Roy Smith <roy@panix.com> - 2014-04-29 09:38 -0400
        Re: Significant digits in a float? Chris Angelico <rosuav@gmail.com> - 2014-04-30 02:30 +1000
          Re: Significant digits in a float? Roy Smith <roy@panix.com> - 2014-04-29 19:53 -0400
            Re: Significant digits in a float? Chris Angelico <rosuav@gmail.com> - 2014-04-30 10:13 +1000
            Re: Significant digits in a float? Ben Finney <ben@benfinney.id.au> - 2014-04-30 10:13 +1000
            Re: Significant digits in a float? Chris Angelico <rosuav@gmail.com> - 2014-04-30 10:17 +1000
            Re: Significant digits in a float? Ben Finney <ben@benfinney.id.au> - 2014-04-30 10:20 +1000
            Re: Significant digits in a float? Grant Edwards <invalid@invalid.invalid> - 2014-04-30 18:19 +0000
        Re: Significant digits in a float? Ned Batchelder <ned@nedbatchelder.com> - 2014-04-29 12:47 -0400
          Re: Significant digits in a float? Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2014-04-30 09:45 +1200
        Re: Significant digits in a float? Chris Angelico <rosuav@gmail.com> - 2014-04-30 02:59 +1000
        Re: Significant digits in a float? Adam Funk <a24061@ducksburg.com> - 2014-04-29 21:16 +0100
          Re: Significant digits in a float? Mark H Harris <harrismh777@gmail.com> - 2014-04-29 15:39 -0500
            Re: Significant digits in a float? Chris Angelico <rosuav@gmail.com> - 2014-04-30 07:15 +1000
          Re: Significant digits in a float? Ryan Hiebert <ryan@ryanhiebert.com> - 2014-04-29 15:42 -0500
          Re: Significant digits in a float? emile <emile@fenx.com> - 2014-04-29 15:42 -0700
            Re: Significant digits in a float? alister <alister.nospam.ware@ntlworld.com> - 2014-04-30 09:03 +0000
            Re: Significant digits in a float? Grant Edwards <invalid@invalid.invalid> - 2014-04-30 18:21 +0000
              Re: Significant digits in a float? emile <emile@fenx.com> - 2014-05-01 09:34 -0700
                Re: Significant digits in a float? alister <alister.nospam.ware@ntlworld.com> - 2014-05-01 17:13 +0000
          Re: Significant digits in a float? Chris Angelico <rosuav@gmail.com> - 2014-04-30 08:51 +1000
            Re: Significant digits in a float? Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2014-04-30 20:14 +1200
              Re: Significant digits in a float? Chris Angelico <rosuav@gmail.com> - 2014-04-30 18:27 +1000
              Re: Significant digits in a float? Mark Lawrence <breamoreboy@yahoo.co.uk> - 2014-04-30 14:05 +0100
          Re: Significant digits in a float? Mark Lawrence <breamoreboy@yahoo.co.uk> - 2014-04-30 00:34 +0100
          Re: Significant digits in a float? Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2014-04-29 20:37 -0400
          Re: Significant digits in a float? Roy Smith <roy@panix.com> - 2014-04-29 20:45 -0400
          Re: Significant digits in a float? Chris Angelico <rosuav@gmail.com> - 2014-04-30 10:45 +1000
            Re: Significant digits in a float? Roy Smith <roy@panix.com> - 2014-04-29 20:48 -0400
          Re: Significant digits in a float? Ethan Furman <ethan@stoneleaf.us> - 2014-04-29 19:31 -0700
            Re: Significant digits in a float? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-04-30 02:59 +0000
              Re: Significant digits in a float? Roy Smith <roy@panix.com> - 2014-04-29 23:30 -0400
                Re: Significant digits in a float? Chris Angelico <rosuav@gmail.com> - 2014-04-30 13:40 +1000
          Re: Significant digits in a float? Chris Angelico <rosuav@gmail.com> - 2014-04-30 13:03 +1000
            Re: Significant digits in a float? Roy Smith <roy@panix.com> - 2014-04-30 08:01 -0400
          Off-topic  circumnavigating the earth in a mile or less  [was Re: Significant digits in a float?] Ethan Furman <ethan@stoneleaf.us> - 2014-04-30 06:14 -0700
          Re: Off-topic  circumnavigating the earth in a mile or less  [was Re: Significant digits in a float?] Ethan Furman <ethan@stoneleaf.us> - 2014-04-30 07:02 -0700
            Re: Off-topic  circumnavigating the earth in a mile or less Adam Funk <a24061@ducksburg.com> - 2014-05-01 21:52 +0100
          Re: Off-topic circumnavigating the earth in a mile or less [was Re: Significant digits in a float?] Chris Angelico <rosuav@gmail.com> - 2014-05-01 00:27 +1000
          Re: Off-topic circumnavigating the earth in a mile or less [was Re: Significant digits in a float?] Chris Angelico <rosuav@gmail.com> - 2014-05-01 05:10 +1000
          Re: Off-topic circumnavigating the earth in a mile or less [was Re: Significant digits in a float?] Ryan Hiebert <ryan@ryanhiebert.com> - 2014-04-30 10:24 -0500
          Re: Off-topic circumnavigating the earth in a mile or less [was Re: Significant digits in a float?] Ian Kelly <ian.g.kelly@gmail.com> - 2014-04-30 17:46 -0600
          Re: Off-topic circumnavigating the earth in a mile or less [was Re: Significant digits in a float?] Terry Reedy <tjreedy@udel.edu> - 2014-04-30 22:20 -0400
            Re: Off-topic circumnavigating the earth in a mile or less [was Re:   Significant digits in a float?] Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2014-05-01 18:16 +1200
            Re: Off-topic circumnavigating the earth in a mile or less Adam Funk <a24061@ducksburg.com> - 2014-05-01 21:57 +0100
              Re: Off-topic circumnavigating the earth in a mile or less Mark Lawrence <breamoreboy@yahoo.co.uk> - 2014-05-01 22:49 +0100
              Re: Off-topic circumnavigating the earth in a mile or less alister <alister.nospam.ware@ntlworld.com> - 2014-05-02 08:49 +0000
          Re: Off-topic circumnavigating the earth in a mile or less [was Re: Significant digits in a float?] Chris Angelico <rosuav@gmail.com> - 2014-05-01 11:57 +1000
          Re: Off-topic circumnavigating the earth in a mile or less [was Re: Significant digits in a float?] Vlastimil Brom <vlastimil.brom@gmail.com> - 2014-05-01 09:49 +0200
        Re: Significant digits in a float? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-04-30 02:50 +0000
        Re: Significant digits in a float? Grant Edwards <invalid@invalid.invalid> - 2014-04-30 18:18 +0000

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#70733

FromChris Angelico <rosuav@gmail.com>
Date2014-04-30 07:15 +1000
Message-ID<mailman.9585.1398806119.18130.python-list@python.org>
In reply to#70730
On Wed, Apr 30, 2014 at 6:39 AM, Mark H Harris <harrismh777@gmail.com> wrote:
> On 4/29/14 3:16 PM, Adam Funk wrote:
>>
>> "A man pitches his tent, walks 1 km south, walks 1 km east, kills a
>> bear, & walks 1 km north, where he's back at his tent.  What color is
>> the bear?"  ;-)
>>
>
> Who manufactured the tent?

A man pitches his tent 1 km south and kills a bear with it. Clearly
that wasn't a tent, it was a cricket ball.

ChrisA

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#70732

FromRyan Hiebert <ryan@ryanhiebert.com>
Date2014-04-29 15:42 -0500
Message-ID<mailman.9584.1398805988.18130.python-list@python.org>
In reply to#70729

[Multipart message — attachments visible in raw view] — view raw

On Tue, Apr 29, 2014 at 3:16 PM, Adam Funk <a24061@ducksburg.com> wrote:

>
> "A man pitches his tent, walks 1 km south, walks 1 km east, kills a
> bear, & walks 1 km north, where he's back at his tent.  What color is
> the bear?"  ;-)


Skin or Fur?

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#70735

Fromemile <emile@fenx.com>
Date2014-04-29 15:42 -0700
Message-ID<mailman.9586.1398811365.18130.python-list@python.org>
In reply to#70729
On 04/29/2014 01:16 PM, Adam Funk wrote:

> "A man pitches his tent, walks 1 km south, walks 1 km east, kills a
> bear, & walks 1 km north, where he's back at his tent.  What color is
> the bear?"  ;-)

 From how many locations on Earth can someone walk one mile south, one 
mile east, and one mile north and end up at their starting point?

Emile


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#70769

Fromalister <alister.nospam.ware@ntlworld.com>
Date2014-04-30 09:03 +0000
Message-ID<N%28v.113214$N05.45302@fx12.am4>
In reply to#70735
On Tue, 29 Apr 2014 15:42:25 -0700, emile wrote:

> On 04/29/2014 01:16 PM, Adam Funk wrote:
> 
>> "A man pitches his tent, walks 1 km south, walks 1 km east, kills a
>> bear, & walks 1 km north, where he's back at his tent.  What color is
>> the bear?"  ;-)
> 
>  From how many locations on Earth can someone walk one mile south, one
> mile east, and one mile north and end up at their starting point?
> 
> Emile

there are an infinite number of locations where this can happen (although 
only one where you will find a bear.)



-- 
Gomme's Laws:
	(1) A backscratcher will always find new itches.
	(2) Time accelerates.
	(3) The weather at home improves as soon as you go away.

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#70787

FromGrant Edwards <invalid@invalid.invalid>
Date2014-04-30 18:21 +0000
Message-ID<ljrevt$hte$3@reader1.panix.com>
In reply to#70735
On 2014-04-29, emile <emile@fenx.com> wrote:
> On 04/29/2014 01:16 PM, Adam Funk wrote:
>
>> "A man pitches his tent, walks 1 km south, walks 1 km east, kills a
>> bear, & walks 1 km north, where he's back at his tent.  What color is
>> the bear?"  ;-)
>
>  From how many locations on Earth can someone walk one mile south, one 
> mile east, and one mile north and end up at their starting point?

I'm pretty sure there are places in London like that.  At least that's
what it seemed like to somebody from the midwestern US where the
streets are layed out on a grid.

-- 
Grant Edwards               grant.b.edwards        Yow! It's a hole all the
                                  at               way to downtown Burbank!
                              gmail.com            

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#70815

Fromemile <emile@fenx.com>
Date2014-05-01 09:34 -0700
Message-ID<mailman.9630.1398962100.18130.python-list@python.org>
In reply to#70787
On 04/30/2014 11:21 AM, Grant Edwards wrote:
> On 2014-04-29, emile <emile@fenx.com> wrote:
>> On 04/29/2014 01:16 PM, Adam Funk wrote:
>>
>>> "A man pitches his tent, walks 1 km south, walks 1 km east, kills a
>>> bear, & walks 1 km north, where he's back at his tent.  What color is
>>> the bear?"  ;-)
>>
>>   From how many locations on Earth can someone walk one mile south, one
>> mile east, and one mile north and end up at their starting point?
>
> I'm pretty sure there are places in London like that.  At least that's
> what it seemed like to somebody from the midwestern US where the
> streets are layed out on a grid.

I was going to bring up London, but as I recall from my brief visit 
there, I wasn't sure you could go one mile straight in any direction.

:)

Emile



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#70816

Fromalister <alister.nospam.ware@ntlworld.com>
Date2014-05-01 17:13 +0000
Message-ID<jhv8v.132498$Xl1.52773@fx09.am4>
In reply to#70815
On Thu, 01 May 2014 09:34:35 -0700, emile wrote:

> On 04/30/2014 11:21 AM, Grant Edwards wrote:
>> On 2014-04-29, emile <emile@fenx.com> wrote:
>>> On 04/29/2014 01:16 PM, Adam Funk wrote:
>>>
>>>> "A man pitches his tent, walks 1 km south, walks 1 km east, kills a
>>>> bear, & walks 1 km north, where he's back at his tent.  What color is
>>>> the bear?"  ;-)
>>>
>>>   From how many locations on Earth can someone walk one mile south,
>>>   one
>>> mile east, and one mile north and end up at their starting point?
>>
>> I'm pretty sure there are places in London like that.  At least that's
>> what it seemed like to somebody from the midwestern US where the
>> streets are layed out on a grid.
> 
> I was going to bring up London, but as I recall from my brief visit
> there, I wasn't sure you could go one mile straight in any direction.
> 
> :)
> 
> Emile

100 yds is pushing it




-- 
"They told me I was gullible ... and I believed them!"

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#70736

FromChris Angelico <rosuav@gmail.com>
Date2014-04-30 08:51 +1000
Message-ID<mailman.9587.1398811896.18130.python-list@python.org>
In reply to#70729
On Wed, Apr 30, 2014 at 8:42 AM, emile <emile@fenx.com> wrote:
> On 04/29/2014 01:16 PM, Adam Funk wrote:
>
>> "A man pitches his tent, walks 1 km south, walks 1 km east, kills a
>> bear, & walks 1 km north, where he's back at his tent.  What color is
>> the bear?"  ;-)
>
>
> From how many locations on Earth can someone walk one mile south, one mile
> east, and one mile north and end up at their starting point?

Any point where the mile east takes you an exact number of times
around the globe. So, anywhere exactly one mile north of that, which
is a number of circles not far from the south pole.

ChrisA

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#70767

FromGregory Ewing <greg.ewing@canterbury.ac.nz>
Date2014-04-30 20:14 +1200
Message-ID<bsbpo2Fe0hdU1@mid.individual.net>
In reply to#70736
Chris Angelico wrote:

> Any point where the mile east takes you an exact number of times
> around the globe. So, anywhere exactly one mile north of that, which
> is a number of circles not far from the south pole.

True, but there are no bears in Antarctica, so that
rules out all the south-pole solutions.

I think there are still multiple solutions, though.
The bear may have been spray-painted by activists
trying to protect it from polar trophy hunters.

-- 
Greg

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#70768

FromChris Angelico <rosuav@gmail.com>
Date2014-04-30 18:27 +1000
Message-ID<mailman.9605.1398846453.18130.python-list@python.org>
In reply to#70767
On Wed, Apr 30, 2014 at 6:14 PM, Gregory Ewing
<greg.ewing@canterbury.ac.nz> wrote:
> Chris Angelico wrote:
>
>> Any point where the mile east takes you an exact number of times
>> around the globe. So, anywhere exactly one mile north of that, which
>> is a number of circles not far from the south pole.
>
>
> True, but there are no bears in Antarctica, so that
> rules out all the south-pole solutions.
>
> I think there are still multiple solutions, though.
> The bear may have been spray-painted by activists
> trying to protect it from polar trophy hunters.

Well, I did suggest it might have been a black bear:

http://img2.wikia.nocookie.net/__cb20130411125035/disney/images/8/88/Brave-brave-31312503-800-486.png

But spray paint would work too...

ChrisA

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#70776

FromMark Lawrence <breamoreboy@yahoo.co.uk>
Date2014-04-30 14:05 +0100
Message-ID<mailman.9608.1398863135.18130.python-list@python.org>
In reply to#70767
On 30/04/2014 09:14, Gregory Ewing wrote:
> Chris Angelico wrote:
>
>> Any point where the mile east takes you an exact number of times
>> around the globe. So, anywhere exactly one mile north of that, which
>> is a number of circles not far from the south pole.
>
> True, but there are no bears in Antarctica, so that
> rules out all the south-pole solutions.
>
> I think there are still multiple solutions, though.
> The bear may have been spray-painted by activists
> trying to protect it from polar trophy hunters.
>

Couldn't this kill the bear?  My source is the book and film Goldfinger.

-- 
My fellow Pythonistas, ask not what our language can do for you, ask 
what you can do for our language.

Mark Lawrence

---
This email is free from viruses and malware because avast! Antivirus protection is active.
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#70738

FromMark Lawrence <breamoreboy@yahoo.co.uk>
Date2014-04-30 00:34 +0100
Message-ID<mailman.9589.1398814497.18130.python-list@python.org>
In reply to#70729
On 29/04/2014 23:42, emile wrote:
> On 04/29/2014 01:16 PM, Adam Funk wrote:
>
>> "A man pitches his tent, walks 1 km south, walks 1 km east, kills a
>> bear, & walks 1 km north, where he's back at his tent.  What color is
>> the bear?"  ;-)
>
>  From how many locations on Earth can someone walk one mile south, one
> mile east, and one mile north and end up at their starting point?
>
> Emile
>

Haven't you heard of The Triangular Earth Society?

-- 
My fellow Pythonistas, ask not what our language can do for you, ask 
what you can do for our language.

Mark Lawrence

---
This email is free from viruses and malware because avast! Antivirus protection is active.
http://www.avast.com

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#70745

FromDennis Lee Bieber <wlfraed@ix.netcom.com>
Date2014-04-29 20:37 -0400
Message-ID<mailman.9595.1398818406.18130.python-list@python.org>
In reply to#70729
On Wed, 30 Apr 2014 08:51:32 +1000, Chris Angelico <rosuav@gmail.com>
declaimed the following:

>
>Any point where the mile east takes you an exact number of times
>around the globe. So, anywhere exactly one mile north of that, which
>is a number of circles not far from the south pole.
>
	Yeah, but he'd have had to bring his own bear...

	Bears and Penguins don't mix. Seals, OTOH, are food to the bears, and
eat the penquins.

-- 
	Wulfraed                 Dennis Lee Bieber         AF6VN
    wlfraed@ix.netcom.com    HTTP://wlfraed.home.netcom.com/

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#70747

FromRoy Smith <roy@panix.com>
Date2014-04-29 20:45 -0400
Message-ID<roy-5A678E.20453029042014@news.panix.com>
In reply to#70729
In article <8td53bxud5.ln2@news.ducksburg.com>,
 Adam Funk <a24061@ducksburg.com> wrote:

> On 2014-04-29, Roy Smith wrote:
> 
> > Another possibility is that they're latitude/longitude coordinates, some 
> > of which are given to the whole degree, some of which are given to 
> > greater precision, all the way down to the ten-thousandth of a degree.
> 
> That makes sense.  1° of longitude is about 111 km at the equator,
> 78 km at 45°N or S, & 0 km at the poles.
> 
> 
> "A man pitches his tent, walks 1 km south, walks 1 km east, kills a
> bear, & walks 1 km north, where he's back at his tent.  What color is
> the bear?"  ;-)

Assuming he shot the bear, red.

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#70748

FromChris Angelico <rosuav@gmail.com>
Date2014-04-30 10:45 +1000
Message-ID<mailman.9596.1398818760.18130.python-list@python.org>
In reply to#70729
On Wed, Apr 30, 2014 at 10:37 AM, Dennis Lee Bieber
<wlfraed@ix.netcom.com> wrote:
> On Wed, 30 Apr 2014 08:51:32 +1000, Chris Angelico <rosuav@gmail.com>
> declaimed the following:
>
>>
>>Any point where the mile east takes you an exact number of times
>>around the globe. So, anywhere exactly one mile north of that, which
>>is a number of circles not far from the south pole.
>>
>         Yeah, but he'd have had to bring his own bear...
>
>         Bears and Penguins don't mix. Seals, OTOH, are food to the bears, and
> eat the penquins.

Maybe the bear was an antarctic researcher who ate Merida's cake?
That'd change anyone's fate...

ChrisA

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#70749

FromRoy Smith <roy@panix.com>
Date2014-04-29 20:48 -0400
Message-ID<roy-036F30.20482829042014@news.panix.com>
In reply to#70748
In article <mailman.9596.1398818760.18130.python-list@python.org>,
 Chris Angelico <rosuav@gmail.com> wrote:

> On Wed, Apr 30, 2014 at 10:37 AM, Dennis Lee Bieber
> <wlfraed@ix.netcom.com> wrote:
> > On Wed, 30 Apr 2014 08:51:32 +1000, Chris Angelico <rosuav@gmail.com>
> > declaimed the following:
> >
> >>
> >>Any point where the mile east takes you an exact number of times
> >>around the globe. So, anywhere exactly one mile north of that, which
> >>is a number of circles not far from the south pole.
> >>
> >         Yeah, but he'd have had to bring his own bear...
> >
> >         Bears and Penguins don't mix. Seals, OTOH, are food to the bears, 
> >         and
> > eat the penquins.
> 
> Maybe the bear was an antarctic researcher who ate Merida's cake?
> That'd change anyone's fate...
> 
> ChrisA

The cake is a lie.

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#70757

FromEthan Furman <ethan@stoneleaf.us>
Date2014-04-29 19:31 -0700
Message-ID<mailman.9602.1398826582.18130.python-list@python.org>
In reply to#70729
On 04/29/2014 03:51 PM, Chris Angelico wrote:
> On Wed, Apr 30, 2014 at 8:42 AM, emile <emile@fenx.com> wrote:
>> On 04/29/2014 01:16 PM, Adam Funk wrote:
>>
>>> "A man pitches his tent, walks 1 km south, walks 1 km east, kills a
>>> bear, & walks 1 km north, where he's back at his tent.  What color is
>>> the bear?"  ;-)
>>
>>
>>  From how many locations on Earth can someone walk one mile south, one mile
>> east, and one mile north and end up at their starting point?
>
> Any point where the mile east takes you an exact number of times
> around the globe. So, anywhere exactly one mile north of that, which
> is a number of circles not far from the south pole.

Perhaps my geography is rusty, but I was under the impression that one cannot travel south if one is at the South Pole 
(axial, not magnetic).

--
~Ethan~

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#70758

FromSteven D'Aprano <steve+comp.lang.python@pearwood.info>
Date2014-04-30 02:59 +0000
Message-ID<5360672e$0$29965$c3e8da3$5496439d@news.astraweb.com>
In reply to#70757
On Tue, 29 Apr 2014 19:31:31 -0700, Ethan Furman wrote:

> Perhaps my geography is rusty, but I was under the impression that one
> cannot travel south if one is at the South Pole (axial, not magnetic).

Possibly with a rocket aimed straight up.



-- 
Steven D'Aprano
http://import-that.dreamwidth.org/

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#70759

FromRoy Smith <roy@panix.com>
Date2014-04-29 23:30 -0400
Message-ID<roy-8577B7.23303129042014@news.panix.com>
In reply to#70758
In article <5360672e$0$29965$c3e8da3$5496439d@news.astraweb.com>,
 Steven D'Aprano <steve+comp.lang.python@pearwood.info> wrote:

> On Tue, 29 Apr 2014 19:31:31 -0700, Ethan Furman wrote:
> 
> > Perhaps my geography is rusty, but I was under the impression that one
> > cannot travel south if one is at the South Pole (axial, not magnetic).
> 
> Possibly with a rocket aimed straight up.

No, with a rocket aimed straight up, you go north.  To go south, you 
need a rocket aimed straight down.

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#70761

FromChris Angelico <rosuav@gmail.com>
Date2014-04-30 13:40 +1000
Message-ID<mailman.9604.1398833574.18130.python-list@python.org>
In reply to#70759
On Wed, Apr 30, 2014 at 1:30 PM, Roy Smith <roy@panix.com> wrote:
> In article <5360672e$0$29965$c3e8da3$5496439d@news.astraweb.com>,
>  Steven D'Aprano <steve+comp.lang.python@pearwood.info> wrote:
>
>> On Tue, 29 Apr 2014 19:31:31 -0700, Ethan Furman wrote:
>>
>> > Perhaps my geography is rusty, but I was under the impression that one
>> > cannot travel south if one is at the South Pole (axial, not magnetic).
>>
>> Possibly with a rocket aimed straight up.
>
> No, with a rocket aimed straight up, you go north.  To go south, you
> need a rocket aimed straight down.

If I ever go travelling with you guys, I am NOT letting you navigate.

ChrisA

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