stevemangles Posted July 22, 2004 Posted July 22, 2004 Happy pi day everyone...yep its 22/7 meaning its national pi day...so celebrate by using pi
mossoi Posted July 22, 2004 Posted July 22, 2004 298. The sixteenth letter of the Greek alphabet, pi, was first used for the familiar value 3.1415=8A in the publication, "Synopsis Palmariorium Mathesios", authored by William Jones in 1706.
Tesseract Posted July 22, 2004 Posted July 22, 2004 This is 10,000 digits of Pi: 3. 14159 26535 89793 23846 26433 83279 50288 41971 69399 37510 58209 74944 59230 78164 06286 20899 86280 34825 34211 70679 82148 08651 32823 06647 09384 46095 50582 23172 53594 08128 48111 74502 84102 70193 85211 05559 64462 29489 54930 38196 44288 10975 66593 34461 28475 64823 37867 83165 27120 19091 45648 56692 34603 48610 45432 66482 13393 60726 02491 41273 72458 70066 06315 58817 48815 20920 96282 92540 91715 36436 78925 90360 01133 05305 48820 46652 13841 46951 94151 16094 33057 27036 57595 91953 09218 61173 81932 61179 31051 18548 07446 23799 62749 56735 18857 52724 89122 79381 83011 94912 98336 73362 44065 66430 86021 39494 63952 24737 19070 21798 60943 70277 05392 17176 29317 67523 84674 81846 76694 05132 00056 81271 45263 56082 77857 71342 75778 96091 73637 17872 14684 40901 22495 34301 46549 58537 10507 92279 68925 89235 42019 95611 21290 21960 86403 44181 59813 62977 47713 09960 51870 72113 49999 99837 29780 49951 05973 17328 16096 31859 50244 59455 34690 83026 42522 30825 33446 85035 26193 11881 71010 00313 78387 52886 58753 32083 81420 61717 76691 47303 59825 34904 28755 46873 11595 62863 88235 37875 93751 95778 18577 80532 17122 68066 13001 92787 66111 95909 21642 01989 38095 25720 10654 85863 27886 59361 53381 82796 82303 01952 03530 18529 68995 77362 25994 13891 24972 17752 83479 13151 55748 57242 45415 06959 50829 53311 68617 27855 88907 50983 81754 63746 49393 19255 06040 09277 01671 13900 98488 24012 85836 16035 63707 66010 47101 81942 95559 61989 46767 83744 94482 55379 77472 68471 04047 53464 62080 46684 25906 94912 93313 67702 89891 52104 75216 20569 66024 05803 81501 93511 25338 24300 35587 64024 74964 73263 91419 92726 04269 92279 67823 54781 63600 93417 21641 21992 45863 15030 28618 29745 55706 74983 85054 94588 58692 69956 90927 21079 75093 02955 32116 53449 87202 75596 02364 80665 49911 98818 34797 75356 63698 07426 54252 78625 51818 41757 46728 90977 77279 38000 81647 06001 61452 49192 17321 72147 72350 14144 19735 68548 16136 11573 52552 13347 57418 49468 43852 33239 07394 14333 45477 62416 86251 89835 69485 56209 92192 22184 27255 02542 56887 67179 04946 01653 46680 49886 27232 79178 60857 84383 82796 79766 81454 10095 38837 86360 95068 00642 25125 20511 73929 84896 08412 84886 26945 60424 19652 85022 21066 11863 06744 27862 20391 94945 04712 37137 86960 95636 43719 17287 46776 46575 73962 41389 08658 32645 99581 33904 78027 59009 94657 64078 95126 94683 98352 59570 98258 22620 52248 94077 26719 47826 84826 01476 99090 26401 36394 43745 53050 68203 49625 24517 49399 65143 14298 09190 65925 09372 21696 46151 57098 58387 41059 78859 59772 97549 89301 61753 92846 81382 68683 86894 27741 55991 85592 52459 53959 43104 99725 24680 84598 72736 44695 84865 38367 36222 62609 91246 08051 24388 43904 51244 13654 97627 80797 71569 14359 97700 12961 60894 41694 86855 58484 06353 42207 22258 28488 64815 84560 28506 01684 27394 52267 46767 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bloodhound Posted July 22, 2004 Posted July 22, 2004 some approximations this ones due to Ramanujan, a famous indian mathematician who came to england. correct to 31 digits also using all the numbers 0-9 correct to 8 digits and an infinite product that relates pi with the nth prime number p_n , due to Euler pi = = there is also a sequence of six consecutive 9's at the 762 decimal place of pi.known as the feynman point. there is no string of seven 9's in the first million digits of pi. These and all sort of information about pi can be found at http://mathworld.wolfram.com/topics/Pi.html and http://www-gap.dcs.st-and.ac.uk/~history/HistTopics/Pi_through_the_ages.html
Cap'n Refsmmat Posted July 22, 2004 Posted July 22, 2004 If you're in the US, pi day is March 14, or 3/14. EVIL BRITISH PEOPLE SCREWING UP DATES!
Sayonara Posted July 22, 2004 Posted July 22, 2004 STFU and use international date format. mm-dd-yyyy
Martin Posted July 23, 2004 Posted July 23, 2004 this is not a math fact but something about black body radiation at some given temperature T if you work in Planck units (c = G = hbar = k = 1) then there is a unit energy and unit length and area and temperature and so on and you can ask what is the radiant heat power per unit area of a generic surface at temperature T [math] \frac{\pi^2}{60} T^4[/math] thats the radiant heat brightness of something at temp T the fraction pi-square over 60 is the value of the Stefan-Boltzmann constant in natural, or Planck, units.
Martin Posted July 23, 2004 Posted July 23, 2004 Again, this is not a math fact but something physical. It is about the Casimir effect, the energy of the vacuum and the force of attraction it causes between two conducting plates To make it simple suppose we are working in Planck units, there is a unit of force and a unit of distance to measure the separation d of the plates, and a Planck unit of area to measure the area A of the plates. The Casimir attraction force turns out to be proportional to [math] \frac{1}{d^4}[/math] and the constant of proportionality involves pi, so the force per unit area is: [math]\frac{F}{A} = \frac{\pi^2}{240} \frac{1}{d^4}[/math]
Martin Posted July 23, 2004 Posted July 23, 2004 298. The sixteenth letter of the Greek alphabet' date=' pi, was first used for the familiar value 3.1415=8A in the publication, "Synopsis Palmariorium Mathesios", authored by William Jones in 1706.[/quote'] Interesting fact that you found, mossoi. your post didnt give a source so I will give one I found in case anyone wants to look further into Pi history there http://en.wikipedia.org/wiki/Pi "The symbol [math]\inline \pi[/math] for Archimedes' constant was first introduced in 1706 by William Jones when he published A New Introduction to Mathematics, although the same symbol had been used earlier to indicate the circumference of a circle... " http://en.wikipedia.org/wiki/William_Jones_%28mathematician%29 "...Jones published Synopsis Palmariorum Mathesios 1706 , a work which was intended for beginners and which included theorem on differential calculus and infinite series ."
mossoi Posted July 23, 2004 Posted July 23, 2004 Oops - I always forget sources. Never written a paper that requires them. Here it is though: The first use of pi by Jerry Becker - http://mathforum.org/epigone/mathed-news/dragandshing
bloodhound Posted July 23, 2004 Posted July 23, 2004 pi was created by god as a tool to create earth and mankind
ed84c Posted July 23, 2004 Posted July 23, 2004 yeah, its only logical way to do it would it not seem more logical to put them in some sort of order such as shortest (d) next shortest (m) longest (y)
Sayonara Posted July 23, 2004 Posted July 23, 2004 If you want logic, use ISO 8601 which is formatted like this: YYYY-MM-DD.
mossoi Posted July 23, 2004 Posted July 23, 2004 I agree - either largest unit to smallest or vice versa like everything else - we don't mix other scales like that.
ed84c Posted July 23, 2004 Posted July 23, 2004 hmm somebody has either muddled up the acronym or iso is international organisation for standardisation in French
Sayonara Posted July 23, 2004 Posted July 23, 2004 That's just how French works: its sentence structure is closer to Latin than that of English.
bloodhound Posted July 23, 2004 Posted July 23, 2004 would it not seem more logical to put them in some sort of order such as shortest (d) next shortest (m) longest (y) yes that is what i meant when i said "its the only logical way to do it" consistency is the question here. either start from the largest or the smallest. ie. 21/08/2004 or 2004/08/21
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