Re: value of pi and 22/7

2016-06-22 Thread Lawrence D’Oliveiro
On Tuesday, June 21, 2016 at 10:24:46 AM UTC+12, Wildman wrote: > I am not convinced on any of the theories on how the pyramids > were built, or any other of the monolithic sites. “Reality is that which, when you stop believing in it, doesn’t go away.” -- Philip K

Re: value of pi and 22/7

2016-06-21 Thread Gregory Ewing
Marko Rauhamaa wrote: And he made a molten sea, ten cubits from the one brim to the other: it was round all about, and his height was five cubits: and a line of thirty cubits did compass it round about. [1 Kings 7:23] I think I know how that came about. It was actually filled with molt

Re: value of pi and 22/7

2016-06-21 Thread Steven D'Aprano
On Tuesday 21 June 2016 02:01, Ian Kelly wrote: > On Mon, Jun 20, 2016 at 12:22 AM, Steven D'Aprano > wrote: >> There's a difference though. Nobody has tried to legislate the value of pi >> to match your casual reference to "about 1900 square feet", but there's been >> at least one serious attemp

Re: value of pi and 22/7

2016-06-20 Thread Marko Rauhamaa
Wildman : > As you can see, a stone had to be cut, transported and put in place > every 6 minutes 24 hours a day for 23 years. And if the stone count > was actually 2.4 million, the time would be reduced to 5 minutes per > stone. All I can say is wow! It probably means mostly that the Nile produc

Re: value of pi and 22/7

2016-06-20 Thread Wildman via Python-list
On Mon, 20 Jun 2016 01:01:21 -0700, Lawrence D’Oliveiro wrote: > On Monday, June 20, 2016 at 7:32:54 PM UTC+12, Marko Rauhamaa wrote: > >> Width/height ratio of the pyramid of Cheops was so close to π/2 that UFO >> enthusiasts were convinced alien technology was used in the construction >> of the

Re: value of pi and 22/7

2016-06-20 Thread Marko Rauhamaa
Gregory Ewing : > Lawrence D’Oliveiro wrote: > >> I feel a new phrase coming on: “good enough for Bible work”! > > I understand there's a passage in the Bible somewhere that > uses a 1 significant digit approximation to pi... Yes: And he made a molten sea, ten cubits from the one brim to the

Re: value of pi and 22/7

2016-06-20 Thread Grant Edwards
On 2016-06-20, Steven D'Aprano wrote: > One of the most underrated yet critical functions of government is > to standardise weights and measures, and that function evolved very > slowly over time. I doubt that the Egyptian Pharoahs cared about it, Oh, I bet they did. How you measure things affe

Re: value of pi and 22/7

2016-06-20 Thread Grant Edwards
On 2016-06-19, Gregory Ewing wrote: > Lawrence D’Oliveiro wrote: > >> I feel a new phrase coming on: “good enough for Bible work”! > > I understand there's a passage in the Bible somewhere that > uses a 1 significant digit approximation to pi... A lot of the time, 3 is a good-enough approximation

Re: value of pi and 22/7

2016-06-20 Thread Ian Kelly
On Mon, Jun 20, 2016 at 10:01 AM, Ian Kelly wrote: > I'm not aware of any other such legislative attempts. Snopes records > one that allegedly occurred in Indiana but dismisses the claim as > false. s/Indiana/Alabama -- https://mail.python.org/mailman/listinfo/python-list

Re: value of pi and 22/7

2016-06-20 Thread Ian Kelly
On Mon, Jun 20, 2016 at 12:22 AM, Steven D'Aprano wrote: > There's a difference though. Nobody has tried to legislate the value of pi to > match your casual reference to "about 1900 square feet", but there's been at > least one serious attempt to legislate the value of pi to match the implied > va

Re: value of pi and 22/7

2016-06-20 Thread Lawrence D’Oliveiro
On Monday, June 20, 2016 at 7:32:54 PM UTC+12, Marko Rauhamaa wrote: > Width/height ratio of the pyramid of Cheops was so close to π/2 that UFO > enthusiasts were convinced alien technology was used in the construction > of the pyramids. They were also able to get the bases of the pyramids horizo

Re: value of pi and 22/7

2016-06-20 Thread Marko Rauhamaa
Lawrence D’Oliveiro : > On Monday, June 20, 2016 at 10:26:03 AM UTC+12, Gregory Ewing wrote: > >> If you're building something the size of a pyramid, that could >> add up to quite a lot of error. > > Particularly since so many of their neighbours had worked out how to > do much better than that, t

Re: value of pi and 22/7

2016-06-19 Thread Steven D'Aprano
On Monday 20 June 2016 15:19, Ian Kelly wrote: > Sure, but I think you've missed my central point, which is not that > they wouldn't have made reasonably precise measurements in > construction, but only that the storytellers would have rounded things > off for their audience. > > We still do the

Re: value of pi and 22/7

2016-06-19 Thread Lawrence D’Oliveiro
On Monday, June 20, 2016 at 10:26:03 AM UTC+12, Gregory Ewing wrote: > If you're building something the size of a pyramid, that could > add up to quite a lot of error. Particularly since so many of their neighbours had worked out how to do much better than that, thousands of years earlier... --

Re: value of pi and 22/7

2016-06-19 Thread Ian Kelly
On Sun, Jun 19, 2016 at 4:25 PM, Gregory Ewing wrote: > Ian Kelly wrote: >> >> Remember, the cubit was based on the length of the >> forearm, so it's not like it was a terribly precise measurement to >> begin with; > > > Let's not sell them short. Just because it was based on a forearm > doesn't

Re: value of pi and 22/7

2016-06-19 Thread Steven D'Aprano
On Mon, 20 Jun 2016 08:25 am, Gregory Ewing wrote: > Ian Kelly wrote: >> Remember, the cubit was based on the length of the >> forearm, so it's not like it was a terribly precise measurement to >> begin with; > > Let's not sell them short. Just because it was based on a forearm > doesn't mean th

Re: value of pi and 22/7

2016-06-19 Thread Gregory Ewing
Ian Kelly wrote: Remember, the cubit was based on the length of the forearm, so it's not like it was a terribly precise measurement to begin with; Let's not sell them short. Just because it was based on a forearm doesn't mean they didn't have a precise standard for it, any more than people who

Re: value of pi and 22/7

2016-06-19 Thread Gregory Ewing
Lawrence D’Oliveiro wrote: I feel a new phrase coming on: “good enough for Bible work”! I understand there's a passage in the Bible somewhere that uses a 1 significant digit approximation to pi... -- Greg -- https://mail.python.org/mailman/listinfo/python-list

Re: value of pi and 22/7

2016-06-18 Thread Johannes Bauer
On 18.06.2016 01:12, Lawrence D’Oliveiro wrote: > I’m not sure how you can write “30” with one digit... 3e1 has one significant digit. Cheers, Johannes -- >> Wo hattest Du das Beben nochmal GENAU vorhergesagt? > Zumindest nicht öffentlich! Ah, der neueste und bis heute genialste Streich unsere

Re: value of pi and 22/7

2016-06-18 Thread boB Stepp
On Sat, Jun 18, 2016 at 12:47 AM, Tim Harig wrote: > > The main problem I have with significant figures is that measurement > accuracy is often not constrained to a decimal system. A scale that can > measure in 1/5 units is more accurate than a scale that can measure only > in whole units but it

Re: value of pi and 22/7

2016-06-18 Thread Pete Forman
Lawrence D’Oliveiro writes: > On Saturday, March 19, 2011 at 3:16:41 AM UTC+13, Grant Edwards wrote: >> >> On 2011-03-18, peter wrote: >> >>> The Old Testament (1 Kings 7,23) says ... "And he made a molten sea, >>> ten cubits from the one brim to the other: it was round all about, and >>> his hei

Re: value of pi and 22/7

2016-06-18 Thread Christian Gollwitzer
Am 18.06.16 um 03:19 schrieb Steven D'Aprano: If I tell you that some physical phenomenon [let's call it the speed of light] is 299,999,999 m/s, how many significant digits would I be using? What if I tell you that it's 300,000,001 m/s? What if the figure to nine significant digits *actually is

Re: value of pi and 22/7

2016-06-17 Thread John Ladasky
On Friday, March 18, 2011 at 5:17:48 AM UTC-7, Neil Cerutti wrote: > RIIght. What's a cubit? > > -- > Neil Cerutti How long can you tread water? (Showing my age...) -- https://mail.python.org/mailman/listinfo/python-list

Re: value of pi and 22/7

2016-06-17 Thread Tim Harig
On 2016-06-18, Steven D'Aprano wrote: > On Sat, 18 Jun 2016 09:49 am, Ian Kelly wrote: > >> If I tell you that the speed of light is 300,000,000 m/s, do you think >> that measurement has 9 significant digits? If you do, then you would be >> wrong. > What if the figure to nine significant digits *a

Re: value of pi and 22/7

2016-06-17 Thread Ian Kelly
On Fri, Jun 17, 2016 at 10:30 PM, Lawrence D’Oliveiro wrote: > On Saturday, June 18, 2016 at 3:48:43 PM UTC+12, Random832 wrote: >> >> On Fri, Jun 17, 2016, at 19:12, Lawrence D’Oliveiro wrote: >>> >>> I’m not sure how you can write “30” with one digit... >> >> One *significant* digit. > > Like so

Re: value of pi and 22/7

2016-06-17 Thread Lawrence D’Oliveiro
On Saturday, June 18, 2016 at 3:48:43 PM UTC+12, Random832 wrote: > > On Fri, Jun 17, 2016, at 19:12, Lawrence D’Oliveiro wrote: >> >> I’m not sure how you can write “30” with one digit... > > One *significant* digit. Like some credulous past-Bronze-age tribespeople understood the concept of “si

Re: value of pi and 22/7

2016-06-17 Thread Random832
On Fri, Jun 17, 2016, at 19:12, Lawrence D’Oliveiro wrote: > I’m not sure how you can write “30” with one digit... One *significant* digit. Though, as it happens, some ancient number systems, including Hebrew and Greek, have one set of digits for 1-9, one for 10-90, and one for 100-900. -- https:

Re: value of pi and 22/7

2016-06-17 Thread Ethan Furman
On 06/17/2016 06:19 PM, Steven D'Aprano wrote: On Sat, 18 Jun 2016 09:49 am, Ian Kelly wrote: If I tell you that the speed of light is 300,000,000 m/s, do you think that measurement has 9 significant digits? If you do, then you would be wrong. Hmmm. If I tell you that some physical phenomen

Re: value of pi and 22/7

2016-06-17 Thread Steven D'Aprano
On Sat, 18 Jun 2016 09:49 am, Ian Kelly wrote: > If I tell you that the speed of light is 300,000,000 m/s, do you think > that measurement has 9 significant digits? If you do, then you would be > wrong. Hmmm. If I tell you that some physical phenomenon [let's call it the speed of light] is 299,9

Re: value of pi and 22/7

2016-06-17 Thread Ian Kelly
On Jun 17, 2016 5:44 PM, "Lawrence D’Oliveiro" wrote: > > On Saturday, March 19, 2011 at 3:16:41 AM UTC+13, Grant Edwards wrote: > > > > On 2011-03-18, peter wrote: > > > >> The Old Testament (1 Kings 7,23) says ... "And he made a molten sea, > >> ten cubits from the one brim to the other: it was

Re: value of pi and 22/7

2016-06-17 Thread Lawrence D’Oliveiro
On Saturday, March 19, 2011 at 3:16:41 AM UTC+13, Grant Edwards wrote: > > On 2011-03-18, peter wrote: > >> The Old Testament (1 Kings 7,23) says ... "And he made a molten sea, >> ten cubits from the one brim to the other: it was round all about, and >> his height was five cubits: and a line of th

Re: value of pi and 22/7

2016-06-17 Thread Lawrence D’Oliveiro
On Friday, March 18, 2011 at 8:21:36 AM UTC+13, Rotwang wrote: > sum_{j = 1}^\infty 10^{-j!} You forgot a “\” in front of “sum”. (Of course I had to try it in IPython...) -- https://mail.python.org/mailman/listinfo/python-list

Re: value of pi and 22/7

2016-06-17 Thread MRAB
On 2016-06-17 17:51, hed...@hedgui.com wrote: Pi simply is not 3.14159 Time to go to remedial school everyone. If I do something on one side of the equation, I have to do the same on the other side of the equation. With Pi, we are TAKING the diameter, so subtract the width of diameter from th

Re: value of pi and 22/7

2016-06-17 Thread hedgui
Pi simply is not 3.14159 Time to go to remedial school everyone. If I do something on one side of the equation, I have to do the same on the other side of the equation. With Pi, we are TAKING the diameter, so subtract the width of diameter from the circumference of the circle and you have an e

Re: value of pi and 22/7

2011-03-19 Thread D'Arcy J.M. Cain
On Fri, 18 Mar 2011 13:45:47 +0100 Stefan Behnel wrote: > Neil Cerutti, 18.03.2011 13:17: > > RIIght. What's a cubit? > > http://en.wikipedia.org/wiki/Cubit I don't believe that Neil was asking a serious question. http://www.youtube.com/watch?v=so9o3_daDZw -- D'Arcy J.M. Cain |

Re: value of pi and 22/7

2011-03-19 Thread Steven D'Aprano
On Fri, 18 Mar 2011 07:22:43 -0700, Kee Nethery wrote: > On Mar 18, 2011, at 5:17 AM, Neil Cerutti wrote: > >> On 2011-03-18, peter wrote: >>> The Old Testament (1 Kings 7,23) says ... "And he made a molten sea, >>> ten cubits from the one brim to the other: it was round all about, and >>> his h

Re: value of pi and 22/7

2011-03-18 Thread Adam Tauno Williams
On Fri, 2011-03-18 at 14:16 +, Grant Edwards wrote: > On 2011-03-18, peter wrote: > > The Old Testament (1 Kings 7,23) says ... "And he made a molten sea, > > ten cubits from the one brim to the other: it was round all about, and > > his height was five cubits: and a line of thirty cubits did

Re: value of pi and 22/7

2011-03-18 Thread John Gordon
In <8uh0rcfe1...@mid.individual.net> Neil Cerutti writes: > RIIght. What's a cubit? How long can you tread water? -- John Gordon A is for Amy, who fell down the stairs gor...@panix.com B is for Basil, assaulted by bears -- Edw

Re: value of pi and 22/7

2011-03-18 Thread Kee Nethery
On Mar 18, 2011, at 5:17 AM, Neil Cerutti wrote: > On 2011-03-18, peter wrote: >> The Old Testament (1 Kings 7,23) says ... "And he made a molten >> sea, ten cubits from the one brim to the other: it was round >> all about, and his height was five cubits: and a line of thirty >> cubits did compa

Re: value of pi and 22/7

2011-03-18 Thread Grant Edwards
On 2011-03-18, peter wrote: > The Old Testament (1 Kings 7,23) says ... "And he made a molten sea, > ten cubits from the one brim to the other: it was round all about, and > his height was five cubits: and a line of thirty cubits did compass it > round about. ". So pi=3. End Of. There's nothin

Re: value of pi and 22/7

2011-03-18 Thread Stefan Behnel
Sherm Pendley, 18.03.2011 14:46: Stefan Behnel writes: Neil Cerutti, 18.03.2011 13:17: On 2011-03-18, peter wrote: The Old Testament (1 Kings 7,23) says ... "And he made a molten sea, ten cubits from the one brim to the other: it was round all about, and his height was five cubits: and a li

Re: value of pi and 22/7

2011-03-18 Thread Westley Martínez
On Fri, 2011-03-18 at 02:10 -0700, peter wrote: > On Mar 17, 5:22 pm, Kee Nethery wrote: > > My favorite approximation is: 355/113 (visualize 113355 split into two 113 > > 355 and then do the division). The first 6 decimal places are the same. > > > > 3.141592920353982 = 355/113 > > vs > > 3.141

Re: value of pi and 22/7

2011-03-18 Thread Sherm Pendley
Stefan Behnel writes: > Neil Cerutti, 18.03.2011 13:17: >> On 2011-03-18, peter wrote: >>> The Old Testament (1 Kings 7,23) says ... "And he made a molten >>> sea, ten cubits from the one brim to the other: it was round >>> all about, and his height was five cubits: and a line of thirty >>> cubi

Re: value of pi and 22/7

2011-03-18 Thread Aage Andersen
"peter" Kee Nethery > My favorite approximation is: 355/113 (visualize 113355 split into two 113 355 and then do the division). The first 6 decimal places are the same. > > 3.141592920353982 = 355/113 > vs > 3.1415926535897931 > > Kee Nethery Or (more for fun than any practical application) try

Re: value of pi and 22/7

2011-03-18 Thread Neil Cerutti
On 2011-03-18, Stefan Behnel wrote: > Neil Cerutti, 18.03.2011 13:17: >> On 2011-03-18, peter wrote: >>> The Old Testament (1 Kings 7,23) says ... "And he made a molten >>> sea, ten cubits from the one brim to the other: it was round >>> all about, and his height was five cubits: and a line of th

Re: value of pi and 22/7

2011-03-18 Thread Stefan Behnel
Neil Cerutti, 18.03.2011 13:17: On 2011-03-18, peter wrote: The Old Testament (1 Kings 7,23) says ... "And he made a molten sea, ten cubits from the one brim to the other: it was round all about, and his height was five cubits: and a line of thirty cubits did compass it round about. ". So pi=3

Re: value of pi and 22/7

2011-03-18 Thread Neil Cerutti
On 2011-03-18, peter wrote: > The Old Testament (1 Kings 7,23) says ... "And he made a molten > sea, ten cubits from the one brim to the other: it was round > all about, and his height was five cubits: and a line of thirty > cubits did compass it round about. ". So pi=3. End Of. RIIght. Wh

Re: value of pi and 22/7

2011-03-18 Thread peter
On Mar 17, 5:22 pm, Kee Nethery wrote: > My favorite approximation is: 355/113  (visualize 113355 split into two 113 > 355 and then do the division). The first 6 decimal places are the same. > > 3.141592920353982 = 355/113 > vs > 3.1415926535897931 > > Kee Nethery Or (more for fun than any pract

Re: value of pi and 22/7

2011-03-17 Thread Jabba Laci
> My favorite approximation is: 355/113  (visualize 113355 split into two 113 > 355 and then do the division). The first 6 decimal places are the same. > > 3.141592920353982 = 355/113 > vs > 3.1415926535897931 Another, rather funny, approximation of the first 15 digits of pi is to take the length

Re: value of pi and 22/7

2011-03-17 Thread Erik Max Francis
Jeffrey Gaynor wrote: It is the simple "fractional" look about pi vs. how hard it is to compute that drives most of the confusion about pi. The digits of pi are in effectively random order (each digit occur roughly 10% of the time), ... This is equivalent to stating that pi is normal, somethin

Re: value of pi and 22/7

2011-03-17 Thread Rotwang
On 17/03/2011 18:49, Ian Kelly wrote: On Thu, Mar 17, 2011 at 11:36 AM, Jeffrey Gaynor wrote: There are fun math questions, for instance, is there a run of a million 1's someplace in the decimal expansion of pi? Maybe so, but we just don't know, since we've only computed the first trillion or

Re: value of pi and 22/7

2011-03-17 Thread Jeffrey Gaynor
or" Cc: python-list@python.org Sent: Thursday, March 17, 2011 1:49:56 PM Subject: Re: value of pi and 22/7 On Thu, Mar 17, 2011 at 11:36 AM, Jeffrey Gaynor wrote: > There are fun math questions, for instance, is there a run of a million 1's > someplace in the decimal expansio

Re: value of pi and 22/7

2011-03-17 Thread Ian Kelly
On Thu, Mar 17, 2011 at 11:36 AM, Jeffrey Gaynor wrote: > There are fun math questions, for instance, is there a run of a million 1's > someplace in the decimal expansion of pi? Maybe so, but we just don't know, > since we've only computed the first trillion or so digits. Since pi is irrational

Re: value of pi and 22/7

2011-03-17 Thread Jeffrey Gaynor
(pulls out doctorate in Math.) Take a circle and measure its diameter, then circumference (coffee cans and string are helpful). Then pi = Circumference/diameter approximating that is hard. It turns out that even though it *looks* like a nice fraction, the value that results is not (fractions of

Re: value of pi and 22/7

2011-03-17 Thread Kee Nethery
My favorite approximation is: 355/113 (visualize 113355 split into two 113 355 and then do the division). The first 6 decimal places are the same. 3.141592920353982 = 355/113 vs 3.1415926535897931 Kee Nethery -- http://mail.python.org/mailman/listinfo/python-list

Re: value of pi and 22/7

2011-03-17 Thread Ian Kelly
On Thu, Mar 17, 2011 at 10:57 AM, Ian Kelly wrote: > On Thu, Mar 17, 2011 at 10:46 AM, kracekumar ramaraju > wrote: >> I tried the following > 22/7.0 >> 3.1428571428571428 > import math > math.pi >> 3.1415926535897931 > >> >> >> Why is the difference is so much ?is pi =22/7 or som

Re: value of pi and 22/7

2011-03-17 Thread Ian Kelly
On Thu, Mar 17, 2011 at 10:46 AM, kracekumar ramaraju wrote: > I tried the following 22/7.0 > 3.1428571428571428 import math math.pi > 3.1415926535897931 > > > Why is the difference is so much ?is pi =22/7 or something ? Pi is not 22/7. That is just a commonly-used approximat

Re: value of pi and 22/7

2011-03-17 Thread Wolfgang Rohdewald
On Donnerstag 17 März 2011, kracekumar ramaraju wrote: > >>> 22/7.0 > > 3.1428571428571428 > > >>> import math > >>> math.pi > > 3.1415926535897931 > > Why is the difference is so much ?is pi =22/7 or something ? https://secure.wikimedia.org/wikipedia/en/wiki/Pi -- Wolfgang -- http://mail.