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HP-71B Enhanced Math LEX
03-18-2021, 08:22 AM (This post was last modified: 03-18-2021 08:48 AM by J-F Garnier.)
Post: #50
RE: HP-71B Enhanced Math LEX
(03-17-2021 09:00 PM)Albert Chan Wrote:  
(04-27-2020 09:42 AM)J-F Garnier Wrote:  A little challenge for you : during my tests I found a minor problem in some of the new keywords of the previous test version (2b1, see post above). I didn't fix it yet (so still in 2b2, will fix it in a later version) and your mission, would you accept it, is to find the problem...
It's not a major problem, it will not crash your HP71 nor make your big engineering calculations completely fail, but still this is not fully correct and so it may be called a bug.
Hint: the HP75 and Series 80 don't have (and *can't* have) the same problem with these keywords...

It is almost a full year. Time flies ...
What was the bug ?
Is it fixed now ?

I almost forgot it... No, actually it is noted in my todo list but forgot to fix it in the final 2B version.
The problem is: finding the min element of an array made of Inf values incorrectly returns 9.999..E499 instead of Inf:
>DIM A(3)
>MAT A=(INF)
>AMIN(A)
9.99999999999E499

Same with MINAB and similar problem with -Inf and AMAX/MINAB. Not a big deal.

I recently identified a more serious bug, that was present since version 2A too:
raising a complex value to the real power -2 produces an incorrect result.
Z^(-2,0) was ok but Z^(-2) was wrong (computed as Z^2 instead).
This was caused by the changes I did to manage the z^2 operation as z*z in the version 2A.
It is fixed now in revision 2B7 (MATH2B7).

Thanks for your interest, Albert!

J-F
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Messages In This Thread
HP-71B Enhanced Math LEX - J-F Garnier - 01-09-2020, 07:30 PM
RE: HP-71B Enhanced Math LEX - rprosperi - 01-09-2020, 10:36 PM
RE: HP-71B Enhanced Math LEX - charger73 - 01-10-2020, 07:23 AM
RE: HP-71B Enhanced Math LEX - Albert Chan - 01-10-2020, 04:44 PM
RE: HP-71B Enhanced Math LEX - Albert Chan - 01-10-2020, 05:01 PM
RE: HP-71B Enhanced Math LEX - J-F Garnier - 01-10-2020, 05:40 PM
RE: HP-71B Enhanced Math LEX - Albert Chan - 01-10-2020, 06:29 PM
RE: HP-71B Enhanced Math LEX - Erwin - 01-13-2020, 06:10 PM
RE: HP-71B Enhanced Math LEX - J-F Garnier - 01-13-2020, 07:13 PM
RE: HP-71B Enhanced Math LEX - J-F Garnier - 01-26-2020, 10:54 AM
RE: HP-71B Enhanced Math LEX - Albert Chan - 01-26-2020, 03:08 PM
RE: HP-71B Enhanced Math LEX - J-F Garnier - 01-27-2020, 08:05 AM
RE: HP-71B Enhanced Math LEX - Albert Chan - 01-27-2020, 11:35 AM
RE: HP-71B Enhanced Math LEX - J-F Garnier - 01-27-2020, 12:42 PM
RE: HP-71B Enhanced Math LEX - J-F Garnier - 02-12-2020, 07:55 AM
RE: HP-71B Enhanced Math LEX - rprosperi - 02-12-2020, 01:55 PM
RE: HP-71B Enhanced Math LEX - J-F Garnier - 02-14-2020, 12:23 PM
RE: HP-71B Enhanced Math LEX - rprosperi - 02-14-2020, 03:04 PM
RE: HP-71B Enhanced Math LEX - J-F Garnier - 03-19-2020, 07:30 PM
RE: HP-71B Enhanced Math LEX - J-F Garnier - 04-27-2020, 09:42 AM
RE: HP-71B Enhanced Math LEX - Erwin - 04-27-2020, 04:50 PM
RE: HP-71B Enhanced Math LEX - Albert Chan - 03-17-2021, 09:00 PM
RE: HP-71B Enhanced Math LEX - J-F Garnier - 03-18-2021 08:22 AM
RE: HP-71B Enhanced Math LEX - J-F Garnier - 08-08-2020, 09:37 AM
RE: HP-71B Enhanced Math LEX - Paul Dale - 08-09-2020, 11:15 AM
RE: HP-71B Enhanced Math LEX - John Keith - 08-09-2020, 02:16 PM
RE: HP-71B Enhanced Math LEX - Erwin - 08-10-2020, 08:21 PM
RE: HP-71B Enhanced Math LEX - rprosperi - 08-10-2020, 09:42 PM
RE: HP-71B Enhanced Math LEX - Erwin - 08-11-2020, 02:47 PM
RE: HP-71B Enhanced Math LEX - Erwin - 08-11-2020, 05:06 PM
RE: HP-71B Enhanced Math LEX - Gene - 08-09-2020, 01:49 AM
RE: HP-71B Enhanced Math LEX - Paul Dale - 08-09-2020, 10:10 AM
RE: HP-71B Enhanced Math LEX - John Keith - 08-09-2020, 01:04 PM
RE: HP-71B Enhanced Math LEX - Erwin - 08-13-2020, 07:35 AM
RE: HP-71B Enhanced Math LEX - Erwin - 08-13-2020, 04:00 PM
RE: HP-71B Enhanced Math LEX - J-F Garnier - 08-14-2020, 07:53 AM
RE: HP-71B Enhanced Math LEX - Erwin - 08-20-2020, 08:11 PM
RE: HP-71B Enhanced Math LEX - Erwin - 08-21-2020, 05:34 PM
RE: HP-71B Enhanced Math LEX - J-F Garnier - 09-27-2020, 06:25 PM



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