Today's XKCD cartoon has a nice collection of approximations. http://xkcd.com/1047/ There's the ancient expression 6 pi^5 for the mass ratio of the proton to the electron, and the more accurate (e^8 - 10)/phi. Robert Munafo & REIS are at least partially responsible. Rich
* rcs@xmission.com <rcs@xmission.com> [Apr 25. 2012 19:54]:
Today's XKCD cartoon has a nice collection of approximations.
There's the ancient expression 6 pi^5 for the mass ratio of the proton to the electron, and the more accurate (e^8 - 10)/phi. Robert Munafo & REIS are at least partially responsible.
Rich
Already made it into the OEIS: https://oeis.org/A073009 8-) P.S.: my personal approximation for "seconds in a year" if Pi*10^7
[...]
On 4/25/12, Joerg Arndt <arndt@jjj.de> wrote:
* rcs@xmission.com <rcs@xmission.com> [Apr 25. 2012 19:54]:
Today's XKCD cartoon has a nice collection of approximations.
There's the ancient expression 6 pi^5 for the mass ratio of the proton to the electron, and the more accurate (e^8 - 10)/phi. Robert Munafo & REIS are at least partially responsible.
Rich
Already made it into the OEIS: https://oeis.org/A073009
8-)
P.S.: my personal approximation for "seconds in a year" if Pi*10^7
[...]
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On 2012-04-25 11:02, Joerg Arndt wrote:
* rcs@xmission.com <rcs@xmission.com> [Apr 25. 2012 19:54]:
Today's XKCD cartoon has a nice collection of approximations.
There's the ancient expression 6 pi^5 for the mass ratio of the proton to the electron, and the more accurate (e^8 - 10)/phi. Robert Munafo & REIS are at least partially responsible.
Rich
Already made it into the OEIS: https://oeis.org/A073009
8-)
P.S.: my personal approximation for "seconds in a year" if Pi*10^7
[...]
Beneath the strip, Munroe remarks Title Text: Two tips: 1) [...], and 2) if you ever find yourself raising log(anything)^e or taking the pi-th root of anything, set down the marker and back away from the whiteboard; something has gone horribly wrong. I remark http://www.tweedledum.com/rwg/idents.htm (1st formula). --rwg
+Randall, xkcd@xkcd.com. Hey Randall, check out the first line of http://www.tweedledum.com/rwg/idents.htm, where Bill Gosper points out an expression for the pi'th root of 4 :-) --Michael On Thu, Dec 17, 2015 at 2:07 PM, rwg <rwg@sdf.org> wrote:
On 2012-04-25 11:02, Joerg Arndt wrote:
* rcs@xmission.com <rcs@xmission.com> [Apr 25. 2012 19:54]:
Today's XKCD cartoon has a nice collection of approximations.
There's the ancient expression 6 pi^5 for the mass ratio of the proton to the electron, and the more accurate (e^8 - 10)/phi. Robert Munafo & REIS are at least partially responsible.
Rich
Already made it into the OEIS: https://oeis.org/A073009
8-)
P.S.: my personal approximation for "seconds in a year" if Pi*10^7
[...]
Beneath the strip, Munroe remarks Title Text: Two tips: 1) [...], and 2) if you ever find yourself raising log(anything)^e or taking the pi-th root of anything, set down the marker and back away from the whiteboard; something has gone horribly wrong.
I remark http://www.tweedledum.com/rwg/idents.htm (1st formula). --rwg
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participants (5)
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Fred lunnon -
Joerg Arndt -
Michael Kleber -
rcs＠xmission.com -
rwg