Welcome,
Guest
. Please
login
or
register
.
Did you miss your
activation email
?
1 Hour
1 Day
1 Week
1 Month
Forever
Login with username, password and session length
Home
About
Team
Rules
Stats
Status
Sitemap
Chat
Downloads
Forum
News
Our Projects
Major Community Projects
Recent Posts
Unread Posts
Replies
Tools
SourceCoder3
Other Things...
Omnimaga Radio
TI-83 Plus ASM File Unsquisher
Z80 Conversion Tools
IES TI File Editor
Free RAM areas
Comprehensive Getkeyr table
URL Shortener
Online Axe Tilemap Editor
Help
Contact Us
Change Request
Report Issue/Bug
Team
Articles
Members
View the memberlist
Search For Members
Buddies
Login
Register
Omnimaga
»
Forum
»
General Discussion
»
Other Discussions
»
Math and Science
»
Interval arithmetic questions
« previous
next »
Print
Pages: [
1
]
Go Down
Author
Topic: Interval arithmetic questions (Read 4503 times)
0 Members and 1 Guest are viewing this topic.
harold
LV5
Advanced (Next: 300)
Posts: 226
Rating: +41/-3
Interval arithmetic questions
«
on:
August 07, 2011, 12:07:34 pm »
I'm doing some interval arithmetic, and I can't seem to find the answer to this:
When adding two intervals where one of them is empty, what is the result?
For example, [a, b] + {} =
empty
[a, b]
undefined
?
Logged
Blog about bitmath:
bitmath.blogspot.nl
Check the
haroldbot thread
for the supported commands and syntax.
You can use haroldbot from
this website
.
ben_g
Hey cool I can set a custom title now :)
LV9
Veteran (Next: 1337)
Posts: 1002
Rating: +125/-4
Asm noob
Re: Interval arithmetic questions
«
Reply #1 on:
August 07, 2011, 02:23:08 pm »
I think the result would be ERR:DIM MISMATCH, so it's undefined.
Logged
My projects
- The Lost Survivors (Unreal Engine)
ACTIVE
[GameCommandoSquad main project]
- Oxo, with single-calc multiplayer and AI (axe)
RELEASED
(
screenshot
) (
topic
)
- An android version of oxo (java)
ACTIVE
- A 3D collision detection library (axe)
RELEASED!
(
topic
)(
screenshot
)(
more recent screenshot
)(
screenshot of it being used in a tilemapper
)
Spoiler
For
inactive
:
- A first person shooter with a polygon-based 3d engine. (z80, will probably be recoded in axe using GLib)
ON HOLD
(
screenshot
)
- A java MORPG. (pc)
DEEP COMA
(
read more
)(
screenshot
)
- a minecraft game in axe
DEAD
(
source code available
)
- a 3D racing game (axe)
ON HOLD
(
outdated screenshot of asm version
)
This signature was last updated on 20/04/2015 and may be outdated
fb39ca4
LV10
31337 u53r (Next: 2000)
Posts: 1749
Rating: +60/-3
Re: Interval arithmetic questions
«
Reply #2 on:
August 07, 2011, 02:26:16 pm »
These aren't matrices, but I also think it is undefined.
Interval addition is defined as [a,b]+[c,d]=[a+b,c+d], and since c and d are undefined, [a+undefined,b+undefined], would be [undefined, undefined] or just undefined.
Logged
Horrowind
LV2
Member (Next: 40)
Posts: 25
Rating: +6/-0
Re: Interval arithmetic questions
«
Reply #3 on:
August 07, 2011, 02:56:31 pm »
to rephrase the t0xic_kitt3ns statement: there is no empty intervall, {} is the empty set, and therefore can not be added to an intervall.
Logged
AngelFish
Is this my custom title?
Administrator
LV12
Extreme Poster (Next: 5000)
Posts: 3242
Rating: +270/-27
I'm a Fishbot
Re: Interval arithmetic questions
«
Reply #4 on:
August 07, 2011, 03:40:12 pm »
It depends on what you're asking. If you're asking how to add the null set to an interval, it's undefined. If you're asking how to add an interval equivalent to ]a,a[, then the answer is that the interval remains unchanged.
Logged
∂²Ψ -(2m(V(x)-E)Ψ
--- = -------------
∂x² ℏ²Ψ
harold
LV5
Advanced (Next: 300)
Posts: 226
Rating: +41/-3
Re: Interval arithmetic questions
«
Reply #5 on:
August 07, 2011, 03:53:40 pm »
ok thanks, it looks like it's undefined
shortly after making the first post I changed the algorithm somewhat so that it will never have to attempt interval addition where one is the empty interval, so I don't really need this anymore, but thanks anyway
Logged
Blog about bitmath:
bitmath.blogspot.nl
Check the
haroldbot thread
for the supported commands and syntax.
You can use haroldbot from
this website
.
Print
Pages: [
1
]
Go Up
« previous
next »
Omnimaga
»
Forum
»
General Discussion
»
Other Discussions
»
Math and Science
»
Interval arithmetic questions