Senior Membership

03102015, 08:51 PM
(This post was last modified: 03102015 08:59 PM by Jlouis.)
Post: #41




RE: Senior Membership
(03102015 08:23 PM)Gerson W. Barbosa Wrote:(03102015 04:27 PM)Dave Frederickson Wrote: We can refer to you as member 2^10. Then you'd be a numerical expression. Is there any problem if I evaluate it on my 35s? P.S.1: I will be there (300 posts) P.S.2: This forum is super! 

03102015, 09:13 PM
Post: #42




RE: Senior Membership
(03102015 06:48 PM)Thomas Radtke Wrote: When to expect a new (unlimited) 15C? :D Quote:Hope you're not offended by my comments. It's just a little sad to no longer be part of the target audience. Nope. Wouldn't offend me at all. Remember, I am part of same target audience you are! TW Although I work for the HP calculator group, the views and opinions I post here are my own. 

03102015, 10:47 PM
Post: #43




RE: Senior Membership
(03102015 08:23 PM)Gerson W. Barbosa Wrote: \[326\pi\frac{1}{2}\left ( \frac{1}{\pi }+\frac{5}{\left \{\sqrt{5}\left [90+\pi ^{2}+\frac{1}{25\left ( 10+\frac{\pi }{2} \right )} \right ] \right \}^{2}}\right )\] Decimal approximation: 1023.99999999999996956842991418292652419979856106022912777818085576470376923526062819149347457416711410511991736180529051... 

03102015, 11:27 PM
(This post was last modified: 03102015 11:31 PM by Gerson W. Barbosa.)
Post: #44




RE: Senior Membership
(03102015 08:51 PM)Jlouis Wrote:(03102015 08:23 PM)Gerson W. Barbosa Wrote: In case he doesn't like that simple expression, I would suggest him a slightly more complicated one: Nenhum problema! No problem! I just thought 1 024.000 000 000 000 on the WP 34S would look nicer than 1 024.000 000 00 on the HP35S. :) Notice 326 = 2*163 and 163*pi = 512 + 1/(4*pi). From here, not too difficult to improve the nearinteger result. 56 posts and counting. You'll get there! Really super!, I agree. Gerson. 

03102015, 11:51 PM
Post: #45




RE: Senior Membership
(03102015 11:27 PM)Gerson W. Barbosa Wrote:(03102015 08:51 PM)Jlouis Wrote: Is there any problem if I evaluate it on my 35s? Obrigado, Gerson. I thought that the reason could be the 35s bugs. I have a WP34s on a IPad, but I really like to press real buttons. I'm planning to buy one from Eric soon, as I don't have the skills to flash one. Grande abraço. 

03112015, 12:27 AM
Post: #46




RE: Senior Membership
(03102015 06:48 PM)Thomas Radtke Wrote: It's just a little sad to no longer be part of the target audience. Yeah, that really captures a lot of the emotion many of us have about the Prime. Well said. Bob Prosperi 

03112015, 01:36 AM
Post: #47




RE: Senior Membership
(03102015 08:23 PM)Gerson W. Barbosa Wrote:(03102015 04:27 PM)Dave Frederickson Wrote: We can refer to you as member 2^10. Then you'd be a numerical expression. What did you guys do! 1024 is a nice, simple, power of 2. 10000000000b. You had to go and throw pi into it, no pun intended. What's pi in binary, anyway?? Oh well, it's Gerald's member number so I guess it's up to him. 

03112015, 08:53 AM
Post: #48




RE: Senior Membership
(03112015 01:36 AM)Dave Frederickson Wrote: What's pi in binary, anyway?? pi in binary is: http://www.befria.nu/elias/pi/binpi.html That's one small step for a man  one giant leap for mankind. 

03112015, 09:15 AM
(This post was last modified: 03112015 11:06 AM by Paul Dale.)
Post: #49




RE: Senior Membership
(03112015 08:53 AM)PANAMATIK Wrote: pi in binary is: http://www.befria.nu/elias/pi/binpi.html Far more interesting is that the n^{th} binary digit of pi can be directly computed without having to work all the previous digits out. With this, there is no need to have long digit lists.  Pauli 

03112015, 10:25 AM
Post: #50




RE: Senior Membership  
03112015, 11:01 AM
Post: #51




RE: Senior Membership
(03112015 10:25 AM)Thomas Klemm Wrote: Is there a proof for this? Or is it that we just don't know a similar formula for base 10? Quite the contrary, the base ten extraction method for pi has been found! I should keep more up to date. Pauli 

03112015, 11:15 AM
(This post was last modified: 03112015 11:39 AM by Gerald H.)
Post: #52




RE: Senior Membership
(03112015 10:25 AM)Thomas Klemm Wrote:(03112015 09:15 AM)Paul Dale Wrote: The same isn't true for base 10. To date no human has published a formula for digit by digit expansion of pi to base ten. For ln(9/10) 1/(g*10^g) for g from 1 upwards gives the base 10 digits. Edit: I too should keep up to date. Thanks for reducing my ignorance! But then again, I'm not sure Plouffe is correct  he has a history. Edit: OK, convinced. 

03112015, 11:20 AM
Post: #53




RE: Senior Membership  
03112015, 11:49 AM
(This post was last modified: 03112015 11:50 AM by Gerson W. Barbosa.)
Post: #54




RE: Senior Membership
(03112015 11:01 AM)Paul Dale Wrote:(03112015 10:25 AM)Thomas Klemm Wrote: Is there a proof for this? Or is it that we just don't know a similar formula for base 10? There is also this paper by Xavier Gourdon: Computation of the nth decimal digit of π with low memory Quoting the abstract: "This paper presents an algorithm that computes directly the nth decimal digit of π in subquadratic time and very low memory. It improves previous results of Simon Plouffe, later refined by Fabrice Bellard. The problem of the nth digit computation in base 2 had already been successfully treated thanks to the use of appropriate series, but no corresponding formula for the question in base 10 has been found yet. However, our result is a progress. Another result in this paper permits to compute directly the nth decimal digit of π with intermediate memory size, leading to intermediate time complexity between linear and quadratic." Gerson. 

03112015, 12:38 PM
Post: #55




RE: Senior Membership
(03112015 11:49 AM)Gerson W. Barbosa Wrote: There is also this paper by Xavier Gourdon: I get a: 403 Forbidden But this link to nthdecimaldigit.pdf works for me. The search would lead me to an old thread "One more slice of PI" which points to a "program for the 41c that calculates the next 6 digits of pi from any given point in the decimal expansion". Cheers Thomas 

03112015, 12:48 PM
Post: #56




RE: Senior Membership
(03102015 08:45 PM)Jlouis Wrote:(03102015 03:35 AM)Joe Horn Wrote: 2187? Cell 2187 has Princess Leia Organa in it. Level 5, Detention Block AA 23. I'm afraid she's scheduled to be terminated. Better her than me. <light saber sound; core dump abruptly ceases> In the old forum those who are now known as "senior members" were called "the regulars here" http://www.hpmuseum.org/cgisys/cgiwrap/...265#111267 No need to hurry! Seniorship will eventually be reached simply by being "a regular here" regardless of your being a guru or a disciple like myself :) Gerson. 

03112015, 01:02 PM
Post: #57




RE: Senior Membership
(03112015 12:38 PM)Thomas Klemm Wrote: The search would lead me to an old thread "One more slice of PI" which points to a "program for the 41c that calculates the next 6 digits of pi from any given point in the decimal expansion". Thanks for the links, Thomas! I started that 10year old thread and yet I had completely forgotten about it. This is Hugh Steers's original posting: http://www.hpmuseum.org/cgisys/cgiwrap/...read=55868 Gerson (formerly known as GWB). 

03112015, 01:33 PM
Post: #58




RE: Senior Membership
(03092015 02:14 AM)MarkMason Wrote:(03082015 09:14 PM)Tugdual Wrote: Have I been so talkative? Hard to believe I wrote 300 mails here already :\ Oh, so you're a kid! My first was an HP45. I was thinking of buying a 35 but just when I was about to buy, the 45 came out. Look at that GOLD key, baby! Woo hoo! Double your pleasure, double your fun.... (if you can complete that jingle, then you ARE old!) Tom "The Elder" Lake Tom L Cui bono? 

03112015, 02:25 PM
Post: #59




RE: Senior Membership
Is that Nth digit of binary pi thing all that impressive?
I can guess a digit and have a 50% chance of being right! 2speed HP41CX,int2XMEM+ZEN, HPIL+DEVEL, HPIL+X/IO, I/R, 82143, 82163, 82162 25,35,45,55,65,67,70,80 

03112015, 03:17 PM
Post: #60




RE: Senior Membership
(03112015 01:33 PM)toml_12953 Wrote: Double your pleasure, double your fun.... (if you can complete that jingle, then you ARE old!) If you can complete the jingle without having to search the internet, I would add :) https://www.youtube.com/watch?v=PHfjdxN1URI 

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