WP 34S Modulo Bug

06222014, 07:02 AM
Post: #1




WP 34S Modulo Bug
Try 4, 2, Mod
My 3.3T 3645 returns 2. 

06222014, 08:10 AM
Post: #2




RE: WP 34S Modulo Bug
That's correct IMHO. Please compare p.67 of the printed manual.
d:) 

06222014, 08:43 AM
Post: #3




RE: WP 34S Modulo Bug  
06222014, 09:04 AM
Post: #4




RE: WP 34S Modulo Bug
It ain't OVER 'till it's 2 PICK 

06222014, 10:44 AM
(This post was last modified: 06222014 10:46 AM by pito.)
Post: #5




RE: WP 34S Modulo Bug  
06222014, 10:48 AM
Post: #6




RE: WP 34S Modulo Bug
(06222014 10:44 AM)pito Wrote:(06222014 08:43 AM)Gerald H Wrote: Page 58 of electronic manual, example, 2nd line, substituting my values gives Thank you Pito for your interest, but would you say two numbers can have a remainder of zero & nonzero modulo? 

06222014, 10:53 AM
(This post was last modified: 06222014 10:55 AM by pito.)
Post: #7




RE: WP 34S Modulo Bug
(06222014 10:48 AM)Gerald H Wrote:As I wrote above, the 4 mod 2 shall be 0.(06222014 10:44 AM)pito Wrote: That is a formula for a division in the integer mode, not for a mod.. Afaik "mod function is defined as the amount by which a number exceeds the largest integer multiple of the divisor that is not greater than that number.." 

06222014, 10:54 AM
Post: #8




RE: WP 34S Modulo Bug
(06222014 09:04 AM)HP67 Wrote: 4 mod 2 @ Wolfram Thank you for the reference. But surely Walter B's contention can be confirmed(?) by a reference, as indeed he has to himself. Your ref has the doubtful advantage of not having been written by yourself. A battle of authorities or some careful thought? 

06222014, 10:55 AM
Post: #9




RE: WP 34S Modulo Bug  
06222014, 10:56 AM
Post: #10




RE: WP 34S Modulo Bug
Are you sure you shouldn't be using the RMDR operation? 4 2 RMDR gives 0.
MOD and RMDR differ in their processing of negative values. The former being added late for compatibility with the 41 series devices.  Pauli 

06222014, 11:18 AM
Post: #11




RE: WP 34S Modulo Bug
(06222014 10:54 AM)Gerald H Wrote:(06222014 09:04 AM)HP67 Wrote: 4 mod 2 @ Wolfram My HP 48 and HP 50g also show a result of zero. If the answer isn't zero, then there are going to be a lot more upset people (HP and Wolfram customers) than WP 34S customers It ain't OVER 'till it's 2 PICK 

06222014, 11:32 AM
Post: #12




RE: WP 34S Modulo Bug
(06222014 10:56 AM)Paul Dale Wrote: Are you sure you shouldn't be using the RMDR operation? 4 2 RMDR gives 0. 4 CHS ENTER^ 2 XEQ 'MOD gives 0 on the 41 Greetings, Massimo +×÷ ↔ left is right and right is wrong 

06222014, 11:33 AM
Post: #13




RE: WP 34S Modulo Bug  
06222014, 12:25 PM
Post: #14




RE: WP 34S Modulo Bug
(06222014 10:56 AM)Paul Dale Wrote: Are you sure you shouldn't be using the RMDR operation? 4 2 RMDR gives 0. Very interesting. So you propose an operating system where a zero remainder corresponds to a nonzero result modulo? 

06222014, 12:30 PM
Post: #15




RE: WP 34S Modulo Bug
(06222014 11:33 AM)pito Wrote:(06222014 10:56 AM)Paul Dale Wrote: MOD and RMDR differ in their processing of negative values.That is true, however Much better, an appeal to a definition! You may by now be wondering how proficient in arithmetic some of the correspondents are. 

06222014, 12:33 PM
Post: #16




RE: WP 34S Modulo Bug
(06222014 11:18 AM)HP67 Wrote:(06222014 10:54 AM)Gerald H Wrote: Thank you for the reference. My HPPRIME returns Zero for the 4 MOD 2 expression as well. Jose Mesquita RadioMuseum.org member 

06222014, 12:34 PM
Post: #17




RE: WP 34S Modulo Bug
Meanwhile I believe the problem is in psychology.
The poor MOD function is the only function singled out in the manual as existing "unfortunately"! Clearly Euler & Gauss preferred modulo to remainder; Newton was ambiguous, but never actually disparaging of modulo. I would rather discount Fermat's wellknown antipathy to modulo as a quirk, shared by a diehard few even today. 

06222014, 12:35 PM
Post: #18




RE: WP 34S Modulo Bug
(06222014 12:33 PM)jebem Wrote:(06222014 11:18 AM)HP67 Wrote: My HP 48 and HP 50g also show a result of zero. If the answer isn't zero, then there are going to be a lot more upset people (HP and Wolfram customers) than WP 34S customers Yes, it's certainly zero as we all know. Unfortunately those who tried to support the OP were regarded unfavorably by that very same person we sought to help. So much for this thread It ain't OVER 'till it's 2 PICK 

06222014, 12:36 PM
Post: #19




RE: WP 34S Modulo Bug
(06222014 12:33 PM)jebem Wrote:(06222014 11:18 AM)HP67 Wrote: My HP 48 and HP 50g also show a result of zero. If the answer isn't zero, then there are going to be a lot more upset people (HP and Wolfram customers) than WP 34S customers Thank you for the reference. Inability to acknowledge an overt error makes me wonder whether other bug reports have been so disparagingly treated. 

06222014, 12:38 PM
Post: #20




RE: WP 34S Modulo Bug
So that's it? An obvious error will be passed over & the operating system remains defect?


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