mersenneforum.org  

Go Back   mersenneforum.org > Extra Stuff > Programming

Reply
 
Thread Tools
Old 2005-10-14, 06:31   #1
jinydu
 
jinydu's Avatar
 
Dec 2003
Hopefully Near M48

2×3×293 Posts
Default Incorrect Mathematica Double Integral

Mathematica claims that:

\Large\int_{0}^{1}\int_{0}^{1}\sqrt{x^3+y^3}dxdy=0.571374-0.0367996i

Obviously, we expect a real-valued answer. What could have went wrong?

Last fiddled with by jinydu on 2005-10-14 at 06:31
jinydu is offline   Reply With Quote
Old 2005-10-14, 07:12   #2
ColdFury
 
ColdFury's Avatar
 
Aug 2002

26·5 Posts
Default

My Mathematica says the answer is roughly 0.635113. I would check your input for errors.
ColdFury is offline   Reply With Quote
Old 2005-10-14, 07:46   #3
jinydu
 
jinydu's Avatar
 
Dec 2003
Hopefully Near M48

110110111102 Posts
Default

No doubt about it, I typed it in correctly.

EDIT: Now that's irritating. I went back to the image file and increased its size, but it still displays very small here.
Attached Thumbnails
Click image for larger version

Name:	Mathematica Error.gif
Views:	436
Size:	19.5 KB
ID:	847  

Last fiddled with by jinydu on 2005-10-14 at 07:48
jinydu is offline   Reply With Quote
Old 2005-10-14, 10:05   #4
ColdFury
 
ColdFury's Avatar
 
Aug 2002

5008 Posts
Default

What version of Mathematica are you using? Mine is 5.
Attached Thumbnails
Click image for larger version

Name:	answer.jpg
Views:	482
Size:	28.8 KB
ID:	848  
ColdFury is offline   Reply With Quote
Old 2005-10-15, 05:48   #5
jinydu
 
jinydu's Avatar
 
Dec 2003
Hopefully Near M48

2·3·293 Posts
Default

Quote:
Originally Posted by ColdFury
What version of Mathematica are you using? Mine is 5.
I'm using 4. If I want a legal version of 5, I will have to pay a lot of money...
jinydu is offline   Reply With Quote
Old 2005-10-16, 01:03   #6
TTn
 

3×7×397 Posts
Default

I'm running version 5(trial cracked).
For evaluation ofcourse.

I'm getting the same as ColdFury.
If you paid money for verision 4, then maybe you want it back!
Or maybe the crack is wrong. ColdFury cracked?
  Reply With Quote
Old 2005-10-16, 02:26   #7
ColdFury
 
ColdFury's Avatar
 
Aug 2002

5008 Posts
Default

No, my software is legal.
ColdFury is offline   Reply With Quote
Old 2005-10-16, 04:03   #8
TTn
 

2×7×47 Posts
Default

So is mine.
  Reply With Quote
Old 2005-10-16, 07:47   #9
ColdFury
 
ColdFury's Avatar
 
Aug 2002

26×5 Posts
Default

Quote:
Originally Posted by TTn
So is mine.
Didn't you just say you were running a cracked trial?
ColdFury is offline   Reply With Quote
Old 2005-10-16, 10:12   #10
TTn
 

120758 Posts
Default

It's sort of a long story, so I'd like to prevent an argument about it.
I ordered the trial legally, and never really got to use it, because windows needed to re-installed 2 days later. Doubt it was mathematicas fault though.
I was supposed to recieve another copy, after contacting them about my problem, but they never sent one. A few months passed by and I forgot about it.

So I took it upon myself to use the honor system.
BTW, It's not illegal, here in NH
to run software on my computer.("Live free or die")
Redistribution, dissesembly, reverse engineering,
or sale would constitute a violation.
There may be some grey areas here, but they are open to interpretation.
So I modified an existing crack found online, to try out the software.
I dont' really like it, although it can be used occasionally as a trial, or test in this case. So far I've used it a few days total.

Trial versions should really go by actual useage anyway.
But this would complicate things for the company, so they tend to side against the consumer.

Again please, I dont want to argue about how what I'm doing is illegal or immoral. It's not, I don't use it.
A rebuttle is fine, but don't bash me for it.
  Reply With Quote
Old 2005-10-16, 22:09   #11
ColdFury
 
ColdFury's Avatar
 
Aug 2002

26·5 Posts
Default

I'm not going to argue, you can do as you please. I just wanted clarification.
ColdFury is offline   Reply With Quote
Reply

Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Is Mathematica really slow? wakko Software 6 2021-02-09 16:52
Need help with an integral Baztardo Homework Help 6 2011-04-10 22:17
please help with an integral Andi47 Homework Help 3 2009-05-13 17:49
Long Division in Mathematica JuanTutors Information & Answers 7 2007-06-14 17:29
Mathematica 6 Released jinydu Lounge 0 2007-05-07 05:05

All times are UTC. The time now is 05:18.

Tue Apr 13 05:18:12 UTC 2021 up 4 days, 23:59, 1 user, load averages: 2.26, 2.38, 2.34

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.

This forum has received and complied with 0 (zero) government requests for information.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation.
A copy of the license is included in the FAQ.