Welcome Guest! To enable all features please Login. New Registrations are disabled.

Notification

Icon
Error

Login


Options
Go to last post Go to first unread
Offline overlord  
#1 Posted : 08 November 2021 20:12:28(UTC)
overlord


Rank: Advanced Member

Groups: Registered
Joined: 23/07/2013(UTC)
Posts: 1,124
Turkey

Was thanked: 506 time(s) in 337 post(s)
There is a bug I have encountered.
The result shouldn't be -1 or 1.
Result are correct for some not for others.
But we can't know when it is correct or not.

Regards

2021-11-08_20-10.png

Edited by moderator 11 November 2021 15:46:48(UTC)  | Reason: added BTS ID

thanks 3 users thanked overlord for this useful post.
on 08/11/2021(UTC),  on 09/11/2021(UTC),  on 11/11/2021(UTC)

Wanna join the discussion?! Login to your SMath Studio Forum forum account. New Registrations are disabled.

Offline overlord  
#2 Posted : 09 November 2021 04:27:09(UTC)
overlord


Rank: Advanced Member

Groups: Registered
Joined: 23/07/2013(UTC)
Posts: 1,124
Turkey

Was thanked: 506 time(s) in 337 post(s)
Not limited with exponents.
nthroot() suffers from this bug too.

negativeone.png
Offline overlord  
#3 Posted : 09 November 2021 18:45:27(UTC)
overlord


Rank: Advanced Member

Groups: Registered
Joined: 23/07/2013(UTC)
Posts: 1,124
Turkey

Was thanked: 506 time(s) in 337 post(s)
Originally Posted by: Jean Giraud Go to Quoted Post
1. Whatever the exponentiation of (i)/(-i)
it has no mathematical meaning.
Win 7 rescues on either default complex or 1
2. Whatever the exponentiation of (-1)
it has no mathematical meaning.
Win 7 simply gives an error message
Differently, Mathcad 11 XP rescues (-1)^
on some complex default value or 1

You are wrong.
Exponentiation of -1 or i has mathematical meaning.
What means is your calculators don't have rectangular form.
I don't care if it has practical usage or not.
Mathematics has it, period.

TI-89 Titanium:
ti89titanum.jpg

Hackmath website:
https://www.hackmath.net/en/calculator/complex-number
2021-11-09_18-41.png
Offline overlord  
#4 Posted : 10 November 2021 23:07:30(UTC)
overlord


Rank: Advanced Member

Groups: Registered
Joined: 23/07/2013(UTC)
Posts: 1,124
Turkey

Was thanked: 506 time(s) in 337 post(s)
Originally Posted by: Jean Giraud Go to Quoted Post
This has nothing to do with Smath.
(-1)^0.36 is the Win Power Function X^Y fetched by Smath.
The X^Y is universal in all CAS.
That it does not evaluate some of your demand(s)
► complain to Microsoft, not in the Smath Community.
Doctor your demands as per the document in Samples.
There is another numerical pitfall wrt X^Y

No, it is wrong in SMath.
Other CAS softwares calculates it correctly.
Your are wrong here.

X^Y is not win power function. (whatever this gibberish means)
I am using linux, programming languages has nothing to do with windows.
If they are not specifically written for it of course.
Dot Net or C# is not specific to Windows.
You are wrong in here too.

X^Y is not universal in all CAS.
All computer assisted software can have different algorithms.
How can someone not know this basic information?
You are wrong here too.

You are wrong for all your claims. My demands are correct.
You lack a lot of knowledge about certain things.
You are just someone who poses as a smart-aleck.
Don't pretend you know everyhing.
Stop being a smart mouth with people.

Mathcad v15:
mathcad.png

Mathematica v8:
mathematica.png

Maxima:
maxima.png

Python:
2021-11-10_18-47.png
Offline Davide Carpi  
#5 Posted : 11 November 2021 16:07:15(UTC)
Davide Carpi


Rank: Advanced Member

Groups: Registered, Advanced Member
Joined: 13/01/2012(UTC)
Posts: 2,639
Man
Italy
Location: Italy

Was thanked: 1323 time(s) in 873 post(s)
listed in the BTS, thank you.

BTW, since it was mentioned, .NET Framework exponentiation of double numbers returns NaN for complex results.
If you like my plugins consider to support SMath Studio buying a plan; to offer me a coffee: paypal.me/dcprojects
thanks 1 user thanked Davide Carpi for this useful post.
on 12/11/2021(UTC)
Users browsing this topic
Forum Jump  
You cannot post new topics in this forum.
You cannot reply to topics in this forum.
You cannot delete your posts in this forum.
You cannot edit your posts in this forum.
You cannot create polls in this forum.
You cannot vote in polls in this forum.