(O.T.) Happy 'XROOT(9,10561572*EXP(2))/sqrtLN(pi)' ! (N.T.)


« Next Oldest  Next Newest »

▼
07042009, 02:39 PM
▼
07042009, 04:04 PM
HAPPY 4TH OF JULY!
07052009, 11:15 AM
... correct to 10 digits ! ... :) Best regards from V. ▼
07052009, 12:47 PM
Hi Valentin, 7.042009002 on the 15C and 7.04200900084 on the 33s. Yes, I know your HP71B IDENTIFY. Should have used it. Anyway, I spent no more than 5 minutes doing it by hand on the 33s. By the way, I tried 7.04000000001 on Plouffe's inverter but it wouldn't find anything closer... Best regards, Gerson.  P.S.: Another one just worked out to celebrate the 30th birthday of the HP41C:
'(45/2+1/47075)/pi' => 7.1619792009 Edited: 5 July 2009, 1:27 p.m.
07052009, 07:28 PM
Not that it is of any relevance to where I live of course, but how about these two gems:
4 SIN e^x >H.MS 6 +
The first is good in degrees mode on many/most scientific models. The second works on a 12c and is only one operation longer.
▼
07052009, 08:12 PM
Getting them in just a few steps is very hard. I would guess you have written a special software to find them... If such is the case, it is interesting just the same. Twice as much steps on the 12c but relevant to where I live:
EEX 2 12x ENTER 7 e^x EEX 3 / LN  LN
It works with the 12c default FIX 2 (but would work up to FIX 7). Regards, Gerson. P.S.: Not so exact but works with FIX 2 and takes the same number of steps it would need to just writing the date:
EEX 2 12x LN
Edited: 5 July 2009, 8:27 p.m. ▼
07052009, 08:56 PM
Quote: Yes, I do have a little helper program that simplifies searching for these :) It started off just applying a set of functions to a value and printing the nearer misses. Later, it grew to allow several function applications. Now it is closer to a minirpn calculator that does a real search. My goal is to ultimately have it do an automatic search. I've been meaning to finish it and clean it up so I can post it online for one and all to use. When I get some time and motivation...  Pauli ▼
07062009, 12:54 PM
Quote: Looking forward to it! Quite useful when one wishes to save some steps when entering constants in programs. For other applications, Inverse Symbolic Calculator might be an option. It correctly identifies 7.04200892003 as '7+2/33*LN(2)' but doesn't simplify it (Advanced lookup). However it fails for 7.04200900084: it just returns "Wow, really found nothing." That'll require Valentin's HP71B program (Datafile V26N2P24, March/April 2007). Regards, Gerson. ▼
07072009, 07:05 AM
Hi, Gerson:
returns "Wow, really found nothing." That'll require Valentin's HP71B program (Datafile V26N2P24, March/April 2007)." If using the European date format instead of the US one, i.e., 4.072009, my HP71B IDENTIFY program provides:
which is correct to 11 digits.
Best regards from V. 
Possibly Related Threads...  
Thread  Author  Replies  Views  Last Post  
HP Prime: Quite Happy  Helge Gabert  13  2,498 
12102013, 08:19 AM Last Post: Eddie W. Shore 

[OT] Mathematica free for Raspberry PI  BruceH  32  3,999 
11232013, 05:24 AM Last Post: Nick_S 

Computing pi with the PC1300S  Kiyoshi Akima  0  521 
11172013, 12:24 AM Last Post: Kiyoshi Akima 

Calculating Pi  LHH  9  1,358 
09272013, 10:50 PM Last Post: Gerson W. Barbosa 

[HP Prime]  EXP() or e  JeanMichel  6  967 
08272013, 03:22 PM Last Post: deachp 

Visualization of pi  Bruce Bergman  13  1,772 
08172013, 05:00 PM Last Post: Howard Owen 

Happy Mother's Day!  Eddie W. Shore  1  550 
05122013, 11:35 AM Last Post: Walter B 

happy fibonacci day 5/8/13  Allen  8  1,570 
05092013, 01:48 AM Last Post: Gerson W. Barbosa 

OT: Happy Pi Day!  Eddie W. Shore  13  1,893 
03222013, 10:44 AM Last Post: Les Koller 

Totally OT ... Pi Day for my car  Maximilian Hohmann  18  2,383 
03102013, 01:15 PM Last Post: chris smith 