Search found 165 matches

by dlachieze
Mon Apr 08, 2019 4:45 pm
Forum: Software Library
Topic: External stack
Replies: 43
Views: 6710

Re: External stack

Ok, the WP 34S got local registers in 2011, Free42 got local variables now. Beyond the difference between registers and variables, is there anything else? Just for curiosity... AFAICS: On the plus side for the WP-34S: LocR is allocating local registers AND 16 local flags. There is so far no local f...
by dlachieze
Sun Apr 07, 2019 7:20 am
Forum: Software Library
Topic: External stack
Replies: 43
Views: 6710

Re: External stack

This is cool ! I was wondering if LSTO would support storage arithmetic but it's not necessary: once you have created the local variable with LSTO you can just use the standard STO+, STO-, STO* and STO/ I have installed the Android apk on my tablet and I have an issue with the state file: the first ...
by dlachieze
Tue Apr 02, 2019 10:36 am
Forum: Discuss!
Topic: Fundamental Mathematics
Replies: 9
Views: 1680

Re: Fundamental Mathematics

Interesting question, here is my take on this: arcsin(arccos(arctan(tan(cos(sin(9°))))) works as is only with non-typed arguments and results. Else I would say that it depends if the typing is strong or weak. So it’s a designer’s choice :) With strong typing, then arcsin(arccos(arctan(tan(cos(sin(9°...
by dlachieze
Sat Mar 16, 2019 11:01 pm
Forum: Update Announcements
Topic: UPDATE: DMCP-3.13 / DM42-3.13
Replies: 40
Views: 8012

Re: UPDATE: DMCP-3.13 / DM42-3.13

Yes, it appears that the FAT disk was corrupted. After re-format there is no more issues.
by dlachieze
Fri Mar 15, 2019 2:26 pm
Forum: Update Announcements
Topic: UPDATE: DMCP-3.13 / DM42-3.13
Replies: 40
Views: 8012

Re: UPDATE: DMCP-3.13 / DM42-3.13

Just noticed one thing: if you move to the <Parent> directory from the PROGRAMS or STATE directories, then both of them are not listed and you cannot go back. That looks very strange. Would it be possible you can make disk image from your calc FAT? Something like dd if=/dev/sde of=dm42.fat and send...
by dlachieze
Fri Mar 15, 2019 12:31 pm
Forum: Update Announcements
Topic: UPDATE: DMCP-3.13 / DM42-3.13
Replies: 40
Views: 8012

Re: UPDATE: DMCP-3.13 / DM42-3.13

Perfect update with the combo file from 3.12. The new file management with directories, increased file items and two column display is really cool :) Just noticed one thing: if you move to the <Parent> directory from the PROGRAMS or STATE directories, then both of them are not listed and you cannot ...
by dlachieze
Thu Mar 14, 2019 11:20 pm
Forum: Software Library
Topic: External stack
Replies: 43
Views: 6710

Re: External stack

You can also see the PUSH/POP stack routines published earlier in this sub-forum.
by dlachieze
Wed Feb 20, 2019 6:11 am
Forum: Discuss!
Topic: Little Problem with Complex Mathematics on Calculators
Replies: 28
Views: 3936

Re: Little Problem with Complex Mathematics on Calculators

pauli wrote:
Wed Feb 20, 2019 1:02 am
Infinity is not a number and shouldn't be considered one.
This could the key for the initial issue reported by Walter. While the distributivity law is perfectly valid in ℂ, this may not be valid anymore if you try to apply it to infinity.
by dlachieze
Sat Feb 16, 2019 10:44 am
Forum: Discuss!
Topic: Little Problem with Complex Mathematics on Calculators
Replies: 28
Views: 3936

Re: Little Problem with Complex Mathematics on Calculators

Well, I think that the real question is how you add infinity to ℂ. As far as I know this is called the compactification of ℂ. With the Riemann sphere and the associated extended complex plane there is only one complex infinity, so if I understand it correctly there is nothing like i ∞, juste one com...
by dlachieze
Fri Feb 15, 2019 9:49 am
Forum: Discuss!
Topic: Little Problem with Complex Mathematics on Calculators
Replies: 28
Views: 3936

Re: Little Problem with Complex Mathematics on Calculators

Doing some research I’ve found that for both Wolfram Alpha and the HP Prime: SQRT(-1/0) returns the complex infinity (which is not i ∞ ). As you’re taking the square root of a negative value you're moving to the complex plane where there is only one infinity, the complex infinity which is linked to ...