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by eran_rathan
Wed Jun 20, 2012 5:29 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 495792

Re: 1067: "Pressures"

To later be better able to make comparison to the Galilean, I wish to substitute a couple of their given, as per wiki, any many text books...name-wise s with (x,y,z) to Red with (x,y,z) s' with (x',y',z') to Blue with (x',y',z') i also want, for now, to substitute for vt...as d which equals....the ...
by eran_rathan
Wed Jun 20, 2012 4:56 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 495792

Re: 1067: "Pressures"

steve waterman wrote:Permitted, I would like to make it relevant to v' x' = x-vt.


fixed that for you.

What is your (next) question?
by eran_rathan
Wed Jun 20, 2012 4:32 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 495792

Re: 1067: "Pressures"

gmalivuk wrote:
steve waterman wrote:| (x',y',z') | in BLUE = | (x,y,z) | in RED
When x=x', y=y', and z=z', and the distance function is defined the same way in both systems, then yes, obviously that is true.

And irrelevant and uninteresting.


Ditto.
by eran_rathan
Wed Jun 20, 2012 2:42 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 495792

Re: 1067: "Pressures"

i am adding these related questions as well...if you don't mind... is |(x',y',z')| in Blue fixed in Blue forever? is |(x,y,z)| in Red fixed in Red forever? only as long as you don't move it. :wink: is that a yes or a no or a conditional statement? please... Definitely conditional - its yes only as ...
by eran_rathan
Wed Jun 20, 2012 2:23 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 495792

Re: 1067: "Pressures"

steve waterman wrote:i am adding these related questions as well...if you don't mind...

is |(x',y',z')| in Blue fixed in Blue forever?
is |(x,y,z)| in Red fixed in red forever?


only as long as you don't move it. :wink:
by eran_rathan
Wed Jun 20, 2012 1:57 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 495792

Re: 1067: "Pressures"

Are you looking at just the absolute distances involved between the origin and the point of interest ? BINGO...welcome aboard my train of thought, Watson. Now, no offense...but this is way better phrasing than this longer correct statement... Pfhorrest - "The distance from the origin of one co...
by eran_rathan
Wed Jun 20, 2012 1:42 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 495792

Re: 1067: "Pressures"

Are you looking at just the absolute distances involved between the origin and the point of interest ? BINGO...welcome aboard my train of thought, Watson. Now, no offense...but this is way better phrasing than this longer correct statement... Pfhorrest - "The distance from the origin of one co...
by eran_rathan
Wed Jun 20, 2012 1:06 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 495792

Re: 1067: "Pressures"

So, after we placed/located/relocated/moved/displaced/translated/shifted/etc... one of the coincident set of lat/long coordinates from Greenwich to Los Angeles... each GIVEN set of lat/long coordinates are FIXED wrt to their OWN origin/system....FOREVER. ...Agreed ? lat/long coordinate distances us...
by eran_rathan
Tue Jun 19, 2012 8:55 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 495792

Re: 1067: "Pressures"

If they are coincident...the transformation is superfluous, trivial or not....and even without your trivial transformation.. I still contend that red (x,y,z) = blue(x'y'z')...would you disagree with that? ... that's kinda the point of saying 'trivial'... if that is how you've decided to define your...
by eran_rathan
Tue Jun 19, 2012 8:30 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 495792

Re: 1067: "Pressures"

Steve - A manifold is a local Euclidean space that is continuous over its entire domain - the three-dimensional version is sometimes called Cartesian space. And if you have two coordinate systems, you have a transformation between them, even if it is trivial. This is identical to saying, x' = x + 0 ...
by eran_rathan
Tue Jun 19, 2012 7:11 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 495792

Re: 1067: "Pressures"

Are coordinates fixed or are instead mapped in a single system ?. ..is my question then... You can have an infinite number of points labelled as (1,1,1), that are all different actual points, based on the coordinate system they are in. Alternately, you can have a single point in space with infinite...
by eran_rathan
Tue Jun 19, 2012 7:07 pm UTC
Forum: General
Topic: Lucky Ten Thousand (TIL)
Replies: 13421
Views: 1721134

Re: Today I Learned

TIL the ALT code for pi is 227 => 22/7 is an approximation of π. I will never forget this now.
by eran_rathan
Tue Jun 19, 2012 6:22 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 495792

Re: 1067: "Pressures"

it says it right there: "the change of one coordinate system to another." it says system...if you read carefully..it does NOT say if that means coordinates or selected points... so...we have no working definition for transformation yet... (sigh) If coordinates are meaningless outside of t...
by eran_rathan
Tue Jun 19, 2012 5:53 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 495792

Re: 1067: "Pressures"

Good..that works. re - Cartesian, So, are the (x,y,z) distances/coordinates fixed in an single system? The coordinates are meaningless except in relation to their own system. the change of one coordinate system to another the change of what...selected points? coordinate points ? it says it right th...
by eran_rathan
Tue Jun 19, 2012 5:41 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 495792

Re: 1067: "Pressures"

"I don't want to change the physical location, there are none, I just want to change the imagined mathematical location." We math dudes can do that without having to go from point A to point B...cause its math...bingo, the system is relocation. /facepalm https://encrypted-tbn2.google.com/...
by eran_rathan
Tue Jun 19, 2012 5:35 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 495792

Re: 1067: "Pressures"

okay...that i why I ask questions...to agree on terms...is part of it... Is observation 1 ...coincident systems...a transformation, according to your understanding/definition? Given just the Red system...are its coordinates fixed? Define what you mean by 'fixed'. Two coordinate systems, even if coi...
by eran_rathan
Tue Jun 19, 2012 5:18 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 495792

Re: 1067: "Pressures"

okay...that i why I ask questions...to agree on terms...is part of it... Is observation 1 ...coincident systems...a transformation, according to your understanding/definition? Given just the Red system...are its coordinates fixed? Define what you mean by 'fixed'. Two coordinate systems, even if coi...
by eran_rathan
Tue Jun 19, 2012 4:59 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 495792

Re: 1067: "Pressures"

so...it is NOT a translation...as that implies MOVING ...relocation is MOVED /STATIC/establish or lay out in a new place/mathematical it is not the moving part of that change...just the changed location part. So, relocation is the concept I am going for...translation is totally not. (emphasis mine)...
by eran_rathan
Tue Jun 19, 2012 4:29 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1070: "Words for Small Sets"
Replies: 238
Views: 49465

Re: 1070: "Words for Small Sets"

webzter_again wrote:
orthogon wrote:So how many spits in a Euro?


It's bounded between 2044.5 and zero but rapidly approaching zero as a function of time. Some financial analysts have already concluded that many euro bankers no longer give a spit.


You get +1 internets!
by eran_rathan
Tue Jun 19, 2012 4:07 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 495792

Re: 1067: "Pressures"

Eran - There is NO transformation in either observation 1 or 2. Translation, I have found, means different things to different people. I use the word relocation... meaning...the mathematical static condition... in which case , the relocation IS at its final location. There is definitely NO TRANSFOR...
by eran_rathan
Tue Jun 19, 2012 3:24 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 495792

Re: 1067: "Pressures"

Steve -

I think that these two articles might shed some light on this subject for you:

http://en.wikipedia.org/wiki/Coordinate ... te_systems
http://en.wikipedia.org/wiki/Translation_(geometry)
by eran_rathan
Tue Jun 19, 2012 1:01 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 495792

Re: 1067: "Pressures"

Steve - you are misunderstanding, once again. I accept that ...(x',y',z') in Blue transforms to (x,y,z) in Blue -d [ comparing blue to transformed blue ] I accept that... (x,y,z) in Red transforms to (x',y',z') in Red +d [ comparing red to transformed red ] i deny that ...(x',y',z' ) in Blue = (x-d,...
by eran_rathan
Mon Jun 18, 2012 8:28 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 495792

Re: 1067: "Pressures"

No, No dude...I AM NOT TALKING ABOUT THAT +/- RELATIONSHIP...you continue to FLOG this , and high-jack my presented logic. That +/- RELATIONSHIP IS NOT INVOLVED/required/pertinent ito my proof .... this relationship has zero to do with why I am saying...i reiterate...my proof has zip to do with the...
by eran_rathan
Mon Jun 18, 2012 7:54 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 495792

Re: 1067: "Pressures"

gmalivukWith With respect to their *own* origin, of course neither system changes That is all that I have asking for all along. of course that is true. The final piece to this hideous puzzle....my assertion...only if x' = x -d is true, could x' = x-vt possibly be true. in the Galilean, ( as per the...
by eran_rathan
Mon Jun 18, 2012 7:28 pm UTC
Forum: General
Topic: Lucky Ten Thousand (TIL)
Replies: 13421
Views: 1721134

Re: Today I Learned

TIL There is absolutly nothing at my job that I like anymore. I can't be happy unless I am challenged. I have been here 9 years, they got me fresh out of highschool. Kept me employed through college and I have so many benifits to working here I know in my head I will end up staying until retirement...
by eran_rathan
Mon Jun 18, 2012 7:23 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 495792

Re: 1067: "Pressures"

if it matters that much to you, Steve, fine, x' = x.
by eran_rathan
Mon Jun 18, 2012 6:59 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 495792

Re: 1067: "Pressures"

steve waterman wrote:
eran_rathan wrote:
steve waterman wrote:inch numbers in red = inch numbers in Blue...wrt...their own origin....agreed?


ok.


Can you extrapolate this conceptualization to a purely mathematical now...x' in red = x in blue wrt...their own origin....agreed?


Since they are the same, just call them both x. It will reduce your confusion.
by eran_rathan
Mon Jun 18, 2012 6:50 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 495792

Re: 1067: "Pressures"

I can't, for the life of me, figure out what he is asking, and I work with coordinate geometry all day long. Steve - is English your second language? Yes, Mathematics is my first language. What coordinate geometry credentials do you have that consumes you all day long ? Touche. I'm a professional l...
by eran_rathan
Mon Jun 18, 2012 6:10 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 495792

Re: 1067: "Pressures"

I can't, for the life of me, figure out what he is asking, and I work with coordinate geometry all day long. Steve - is English your second language? Yes, Mathematics is my first language. What coordinate geometry credentials do you have that consumes you all day long ? Touche. I'm a professional l...
by eran_rathan
Mon Jun 18, 2012 5:01 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 495792

Re: 1067: "Pressures"

I can't, for the life of me, figure out what he is asking, and I work with coordinate geometry all day long.

Steve - is English your second language?
by eran_rathan
Fri Jun 15, 2012 6:10 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 495792

Re: 1067: "Pressures"

Did you mean instead to say that.... ( since there are two point P; P in Red and the transformed to P in Blue) ...saying point P without saying the P and in which system, is hugely adding unwanted/counter-productive confusion here. P Red is (2,0,0) = Q Blue is (2,0,0)...agreed ?... (as you just did...
by eran_rathan
Fri Jun 15, 2012 4:34 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 495792

Re: 1067: "Pressures"

If P and Q are coincident, then you can simply use P as the point, with the subscript blue or red for the system you are writing the coordinate in. Moving Blue +3 wrt Red: P Red is (2,0,0) P Blue = P Red + (3,0,0) = (5,0,0) in Blue Moving Red -3 wrt to Blue: P Blue is (2,0,0) P Red = P Blue - (3,0,...
by eran_rathan
Fri Jun 15, 2012 3:41 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 495792

Re: 1067: "Pressures"

If P and Q are coincident, then you can simply use P as the point, with the subscript blue or red for the system you are writing the coordinate in. Moving Blue +3 wrt Red: P Red is (2,0,0) P Blue = P Red + (3,0,0) = (5,0,0) in Blue Moving Red -3 wrt to Blue: P Blue is (2,0,0) P Red = P Blue - (3,0,0...
by eran_rathan
Fri Jun 15, 2012 2:57 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 495792

Re: 1067: "Pressures"

steve waterman wrote:a lot of stuff, where he confuses a coordinate with a point.


You are comparing apples and oranges. It has been sufficiently explained, multiple times. You do not understand coordinate geometry, sirrah.
by eran_rathan
Fri Jun 15, 2012 2:08 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 495792

Re: 1067: "Pressures"

??? I can't really follow what you are saying here, but I'm going to try (again) to explain what I think you are trying to say. Given: Coordinate system, and points P and Q which are non-coincident. P represents the origin of the coordinate system, Q is a point at (x,y,z). 1. Create a new coordinat...
by eran_rathan
Fri Jun 15, 2012 12:55 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1068: "Swiftkey"
Replies: 88
Views: 45558

Re: 1068: "Swiftkey"

Aerokid wrote:I was curious and tried this a few weeks ago. It hasn't changed since.
"I am going to celery you so much for the first time in the world."


this made me laugh hysterically for some reason.
by eran_rathan
Fri Jun 15, 2012 12:30 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 495792

Re: 1067: "Pressures"

they look fine. And you (and everyone else except Steve) is entirely correct. THE TWO POINTS DO NOT MOVE RELATIVE TO EACH OTHER, REGARDLESS OF WHAT IS DONE WITH THE COORDINATE SYSTEMS. (in a static solution). its when stuff starts moving relativistically that things get weird (Lorentz contraction et...
by eran_rathan
Thu Jun 14, 2012 9:12 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 495792

Re: 1067: "Pressures"

Again...you are the point...yes yes...there is relationship of +/- 3 between P in red to the transformed P in blue yes the is a relationship of there is relationship of +/- 3 between Q in red to the transformed Q in blue i get that...i am ONLY talking about, the coordinate values in relationship to...
by eran_rathan
Thu Jun 14, 2012 8:44 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 495792

Re: 1067: "Pressures"

Steve - you apparently edited some things after I responded, let me respond now to those changes: What you are missing is that ..IN THEIR OWN SYSTEM, Red = Blue...that is, (2,3,4) in Red has the same relative distance (2,3,4) in Blue, FOREVER...this NEVER changes...no matter what gets moved or not. ...
by eran_rathan
Thu Jun 14, 2012 8:25 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 495792

Re: 1067: "Pressures"

let me get your stance, please ...is this your position? you agree... QBlue (2,0,0) => QRed (5,0,0) PRed (2,0,0) => PBlue (-1,0,0) yet say, that, the following is absolutely false.... Q red (5,0,0) != P red (2,0,0) Hmmm, if we have two empty systems, we agree that the coordination goes along for th...

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