Search found 233 matches

by jpers36
Fri Jun 22, 2012 2:48 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 516294

Re: 1067: "Pressures"

http://www.watermanpolyhedron.com/images/xkcd2and2.jpg the Galiean coordinate transformaton results are ? please... RED LEFT 3 = BLUE RIGHT 3 = The Galilean transformation does not describe a theoretical space where points move relatively to each other. It is a given that B and R will always be the...
by jpers36
Fri Jun 22, 2012 2:16 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 516294

Re: 1067: "Pressures"

@all : I think it would be better if you could try to write your explanations without using manifolds. He does not understand what manifolds are and is not able to parse any sentence in which this word appears. It's not about the word, it's about the concept. If Steve can agree to the concept that ...
by jpers36
Fri Jun 22, 2012 2:21 am UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 516294

Re: 1067: "Pressures"

So, even though we have had our Cartesian system for all of the 1700's and 1800's, prior to manifold M theory, you insist upon this condition of coordinate points being in the maniford and not in the given Cartesian system. What your doing here is like saying, "Why should I use a real number? ...
by jpers36
Fri Jun 22, 2012 12:43 am UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 516294

Re: 1067: "Pressures"

this is still in limbo at this point....I am to be to granted to ignore manifold theory completely? You can do what you want with your time. But if you ignore manifolds: -You're no longer arguing against Galilean transformations, since they're integral to the math behind them. To address Galilean t...
by jpers36
Thu Jun 21, 2012 9:55 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 516294

Re: 1067: "Pressures"

given... 1 Red Cartesian coordinate system containing (x,y,z) coordinate points with selected point R in Red at (2,0,0) 2 Blue Cartesian coordinate system containing (x',y',z') coordinate points selected point B in Blue at (2,0,0) 3 x = x' and y = y' and z- z' 4 vt = 3 5 no manifold...(now in disus...
by jpers36
Thu Jun 21, 2012 9:51 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 516294

Re: 1067: "Pressures"

Hence the problem...coordinates have points according to what i just posted., called cleverly, "coordinate points"..along with their url sources. No, what you posted shows that coordinates describe points. They all disagree with your assertion that a coordinate set is a point, or that a c...
by jpers36
Thu Jun 21, 2012 9:30 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 516294

Re: 1067: "Pressures"

GIVEN red and blue and no manifold... why not mathematically allowed to NOT have manifold please... It's allowed, but then (1) there's no relationship between Red and Blue whatsoever, and (2) we're not talking about Galilean transforms anymore. perfect....so there is no manifold. given... 1 Red cat...
by jpers36
Thu Jun 21, 2012 8:53 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 516294

Re: 1067: "Pressures"

GIVEN red and blue and no manifold... why not mathematically allowed to NOT have manifold please... It's allowed, but then (1) there's no relationship between Red and Blue whatsoever, and (2) we're not talking about Galilean transforms anymore. Actually, maybe I should say it's allowed for there to...
by jpers36
Thu Jun 21, 2012 8:51 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 516294

Re: 1067: "Pressures"

steve waterman wrote:GIVEN red and blue and no manifold...

why not mathematically allowed to NOT have manifold please...


It's allowed, but then (1) there's no relationship between Red and Blue whatsoever, and (2) we're not talking about Galilean transforms anymore.
by jpers36
Thu Jun 21, 2012 6:20 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 516294

Re: 1067: "Pressures"

steve waterman wrote:Clearly, in the Galilean, x in Red only ever transforms to x' in Blue.
For selected points, R in Red never transforms to R in Blue.


False. Once again, x is not in Red. x' is not in Blue. R is not in Red. R is not in Blue.
by jpers36
Thu Jun 21, 2012 3:12 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 516294

Re: 1067: "Pressures"

A transformation between two Cartesian systems on the same manifold describes the relationship between the two coordinate sets for the same point. So it would define how to get from R's description in Red to R's description in Blue.
by jpers36
Thu Jun 21, 2012 2:37 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 516294

Re: 1067: "Pressures"

So, are you saying that, "points are not elements of a Cartesian system...as in the coordinate set (x,y,z)"? The coordinate set (x,y,z) is an element of a 3-dimensional Cartesian system. It is not a point. It describes a point. The point is not in the Cartesian system. The point is in a 3...
by jpers36
Thu Jun 21, 2012 2:09 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 516294

Re: 1067: "Pressures"

Given: x, y, z, x', y', z' are real numbers Given: X, Y are points No...way confusing...how about selected point R in Red and selected point B in Blue...both at (2,0,0) ? Given: Red and Blue are coordinate systems Given: x, y, z are free variables Given: x'=x, y'=y, z'=z Given: selected point R in ...
by jpers36
Wed Jun 20, 2012 9:39 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 516294

Re: 1067: "Pressures"

let me go back then, I tried to do two steps at once.... in the Galilean, (x,y,z) is always/only in Red and (x',y',z') is always/only in Blue...agreed ? Disagree. Or at least I need clarification here. Given: x, y, z, x', y', z' are real numbers Given: X, Y are points Given: Red and Blue are coordi...
by jpers36
Tue Jun 19, 2012 10:34 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 516294

Re: 1067: "Pressures"

Leaving for the evening. I will be back to check on this, Steve. Don't stress about my disappearance.
by jpers36
Tue Jun 19, 2012 10:28 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 516294

Re: 1067: "Pressures"

AHA...what are your transformation equations for coincident red and Blue ... I say x in Red transforms to x in Blue x' in red transforms to x' in Blue x in red = x' in Blue we take the coordinate x , and transform it to what x would be in blue...not to what x' would be in blue y'all say x' in red t...
by jpers36
Tue Jun 19, 2012 10:06 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 516294

Re: 1067: "Pressures"

I still contend that red (x,y,z) = blue(x'y'z')...would you disagree with that? OK, so we've agreed to assume that a manifold exists which contains both coordinate systems Red and Blue. I assume that x, y, z, x', y', and z' are all variables? If so, I disagree with your contention. red(x,y,z) = blu...
by jpers36
Tue Jun 19, 2012 10:01 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 516294

Re: 1067: "Pressures"

steve waterman wrote:well yes and no...so if x is 2, then x' is not variable..it is also 2
x' = x, y' =y, z'=z


No they're not, or else they'd be labelled the same. That's basic mathematical convention.
by jpers36
Tue Jun 19, 2012 9:08 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 516294

Re: 1067: "Pressures"

I still contend that red (x,y,z) = blue(x'y'z')...would you disagree with that? OK, so we've agreed to assume that a manifold exists which contains both coordinate systems Red and Blue. I assume that x, y, z, x', y', and z' are all variables? If so, I disagree with your contention. red(x,y,z) = blu...
by jpers36
Tue Jun 19, 2012 7:03 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 516294

Re: 1067: "Pressures"

I have a BS in math (and CS), but topology is the big gaping hole in my education. I'm still going to jump in and point out what I see. Steve, it seems to me like you are rejecting the statement, "There exists a 3-manifold M such that both coordinate systems Red and Blue are contained within M....
by jpers36
Mon Jun 18, 2012 8:37 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 516294

Re: 1067: "Pressures"

Steve Waterman has been referenced on xkcd before. The Waterman Butterfly (http://xkcd.com/977/) is his creation.
by jpers36
Mon Jun 18, 2012 8:15 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 516294

Re: 1067: "Pressures"

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 their own given ), x is always in Red and x' is always in Blue. therefore, this Galilean equation x' = x -vt actually states, or math-wise, x' = x -d the c...
by jpers36
Mon Jun 18, 2012 7:04 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1070: "Words for Small Sets"
Replies: 238
Views: 51849

Re: 1070: "Words for Small Sets"

Mirkwood wrote:In the intro to The Fresh prince of Bel Air, we see that "a couple of guys, who were up to no good" is no less than five people.


See, I'd write that down to unreliable narrator instead.
by jpers36
Mon Jun 18, 2012 3:57 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1070: "Words for Small Sets"
Replies: 238
Views: 51849

Re: 1070: "Words for Small Sets"

BrianB wrote:Everyone knows that women stop putting out once they get you to marry them. Your statement would carry more believability had you said that you have a girlfriend.


Your 'everyone' must be marrying the wrong women.
by jpers36
Fri Jun 15, 2012 3:56 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 516294

Re: 1067: "Pressures"

Steve,

Imagine you're in a desert, walking along in the sand, when all of a sudden you look down...
by jpers36
Fri Jun 15, 2012 3:47 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1068: "Swiftkey"
Replies: 88
Views: 46340

Re: 1068: "Swiftkey"

And seeding with Ok gives:

Ok, thanks for your help in making a donation.. I will not have a great time to get a chance. I am up to date with all of your choice of a few days ago.
by jpers36
Fri Jun 15, 2012 3:44 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1068: "Swiftkey"
Replies: 88
Views: 46340

Re: 1068: "Swiftkey"

Just installed to test this. My unseeded text just gives my work address, but seeding with "We" gives:

We are going to a wedding in Lansing tomorrow, not sure how everything is going to work out :(. I'll see what I can do to help you out of the bathroom?
by jpers36
Wed Jun 13, 2012 9:39 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 516294

Re: 1067: "Pressures"

Cartesian coordinate systems are mathematical constructs. Mathematically speaking, one can relocate the system, by imagining that the origin is relocated from 0,0,0 to say 2,0,0.... (wrt itself ) and the system carries with it, all of the original coordinate values/distances. Again, we're dealing w...
by jpers36
Wed Jun 13, 2012 6:16 pm UTC
Forum: General
Topic: Relativity or something [Split from "Pressures"]
Replies: 5149
Views: 516294

Re: 1067: "Pressures"

steve waterman wrote:In your opinion, do Cartesian coordinates values stay affixed to a system, if that system is moved/relocated ? ....anyone ?


How is it possible to move or relocate an abstract idea?
by jpers36
Thu Jun 07, 2012 9:21 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1063: "Kill Hitler"
Replies: 278
Views: 70270

Re: 1063: "Kill Hitler"

J Thomas wrote:I propose that neutrinos are a good candidate for a science fad...


The Neutrinos were all about fads. Look at that hair!

Image
by jpers36
Wed Jun 06, 2012 2:42 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1064: "Front Door"
Replies: 80
Views: 21491

Re: 1064: "Front Door"

moxfyre wrote:I'd like to express my Basically Decent umbrage at the notion of wolves as naturally aggressive to humans, a belief which has contributed to their extirpation from many regions of the world, frequently at the hands of dead white males.


Zombie wolf hunters!
by jpers36
Wed Jun 06, 2012 2:40 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1065: "Shoes"
Replies: 107
Views: 44883

Re: 1065: "Shoes"

Yes, the five-fingers have broken a few feet, but not because of a failure in the shoe itself. Bones are reinforced through a series of micro-fractures, and their subsequent repair. If you smack your forearms into a wall they'll crack, but just a tiny bit. Enough of this over time will allow your t...
by jpers36
Tue Jun 05, 2012 7:01 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1062: "Budget News"
Replies: 36
Views: 14260

Re: 1062: "Budget News"

Shouldn't the image be clickable?
by jpers36
Tue Jun 05, 2012 2:22 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1064: "Front Door"
Replies: 80
Views: 21491

Re: 1064: "Front Door"

Ryozenzuzex wrote:I don't think that I can afford to purchase a statistically significant number of wolves. Much less distribute them in a properly random fashion!

Kickstarter, here I come!


Nice user name! *twirls truhands*
by jpers36
Wed May 30, 2012 2:16 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1060: “Crowdsourcing”
Replies: 115
Views: 23841

Re: 1060: “Crowdsourcing”

You're not treating humans as an end. At all. You're treating the prospective future of the race as an end, while treating every actual currently-living person as a means. Well duh! You say that like it's a bad thing. I referenced it earlier, but let me make this explicit. Go read CS Lewis's Out of...
by jpers36
Tue May 29, 2012 2:43 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1060: “Crowdsourcing”
Replies: 115
Views: 23841

Re: 1060: “Crowdsourcing”

Clearly we must reduce mass exposure to new chemicals until they have been tested on humans for at least a few generations. Who is this "we" that's going to mandate human biochemical testing for a billion people, and mandate a separated primitive lifestyle for another billion? You're not ...
by jpers36
Mon May 28, 2012 5:52 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1060: “Crowdsourcing”
Replies: 115
Views: 23841

Re: 1060: “Crowdsourcing”

We should have at least a second billion who are selectively exposed to modern chemicals. Perhaps divide them into smaller groups who get exposed to different combinations, in higher concentrations than the mass of the population. We might find out about some of the biggest threats in time, that wa...
by jpers36
Mon May 28, 2012 5:38 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1061: "EST"
Replies: 128
Views: 45676

Re: 1061: "EST"

CALENDAR

That is all.

Sometimes my autospellcheck brain puts me into distress. Sorry.
by jpers36
Fri May 25, 2012 10:17 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1060: “Crowdsourcing”
Replies: 115
Views: 23841

Re: 1060: “Crowdsourcing”

Isaac wrote:Chicken is a good source of protein and that is not a rounding error, but cooking it to an internal temperature of 210 degrees Fahrenheit [...] means the protein is gone....


That's nonsense. Protein doesn't magically disappear at 210 degrees.
by jpers36
Fri May 25, 2012 7:12 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1060: “Crowdsourcing”
Replies: 115
Views: 23841

Re: 1060: “Crowdsourcing”

I think the word got its stink from the days that a few big distributors bought food from a whole lot of small farmers, and forced the farmers to sell at a low price, and then sold food to a whole lot of urban families at high prices which the families had no choice but to pay. I remember those day...

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