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Comments:
<0> okay then
<1> What is fmax?
<0> Function max
<1> Also, all mathematica functions have are capitalized.
<2> |Steve|: there is no word "relaxation" in the wikipedia page about linear programming
<0> Well, my calculator is taking way too long to figure this out, shall I present it unanswered
<0> ?
<2> perhaps it is called something else officially?
<2> or is there an example on wikipedia, i could look to understand that?
<3> plutonas, from what i remmeber in linear programming you want to find a certain set that is respecting some conditions in R^2 , so i guess what relaxation means is the process of getting that set smaller and smaller until the optimum set is found
<1> plutonas: The relaxation is the relaxing the conditions such that you can use linear programming.
<1> I have a few books that talk about it in some detail.
<3> |Steve|, what books ?
<4> i want to find a web site explaining vector summatino
<4> i need to sum up 5 vectors
<1> So add them component-wise.
<0> solve(cuberoot(((pi^4)-4p)/(6p^16)-10)+pi*p - 1 = pie,p)
<2> |Steve|: spx2: i think i got the idea, but i still have a problem... Perhaps you could help, i have a paper here, and the abstract says: We give an integer linear programming formulation for this problem (it means the Chinese Postman Problem) and then show that the extreme points of its linear relaxation polyhedron are all half integral.
<4> i will give you a picture steve
<3> plutonas, thats graph theory
<1> So the integer condition is what is being relaxed.
<2> could you explain me what this sentence means? i think if i understand this sentence, i could then read through the paper without the problems i have now
<4> http://img443.imageshack.us/my.php?image=phy1lb1.jpg
<2> spx2: i know...
<2> |Steve|: so it "accepts" not only integers?
<2> and what are the extreme points of a linear relaxation?
<1> I'm not positive, but I think they mean the solution found by performing the minimization.
<4> is it better to draw all vectors on the same coordinate plan
<4> or tpo use a kind of head to tail picture
<1> I'd just find the components of each using sines and cosines and then add them.
<4> and it will be the same
<5> What would be the integration of sqrt(25-x^2) ?
<5> I keep getting an answer involving an extra variable, in substitution:
<5> Oh, sorry, I didn't ask the question correctly...
<5> What would be the integration from 0 to 5 of sqrt(25-x^2) for x?
<6> I say, this prbook thing is quite slick
<1> pi*25/2.
<5> Where u = 25-x^2, I get: int from 5 to 2sqrt(5) of -sqrt(u)/2x for u
<7> Capso: Did you make the substition x = 5sin(x)?
<5> But see how that involves x?
<3> toed, very , i like it allot,if i dont take my exam ill learn from it 24/7 after i finish all my exams , i like it
<1> Capso: It's the top half of a circle.
<1> Of radius 5.
<3> toed, seems much better than rudin
<5> |Steve|: That's rather obvious, and unhelpful.
<1> Uh, that gives you the answer though.
<5> Kasadkad: No.
<1> Oh, from 0 to 5.
<6> spx2: yeah, quite easy to read without sacrificing formality
<1> So it's a quarter of a circle.
<5> |Steve|: I already know it's a quarter of a circle.
<1> So you're done.
<5> |Steve|: I don't need that. I need process of integration.
<1> ...
<5> Trying to learn this here... not get it over with.
<1> Then do the trig substitution.
<8> Capso, just use trig substitution
<8> erm
<9> by 'integration' he means 'antidifferentiation'
<8> Beat to the punch
<8> ;)
<10> For the third time, just use trig substitution !
<5> Catfive: Indeed.
<1> It was a definite integral though.
<10> How many times do we have to tell you ?
<1> Olathe: I think you were the fourth time.
<3> http://www.sosmath.com/calculus/integration/trigsub/trigsub.html
<5> Olathe: I heard you the first time, now hush.
<10> Oh. That's even worse !
<1> I just realized I was the second.
<3> Capso, http://www.sosmath.com/calculus/integration/trigsub/trigsub.html
<5> |Steve|: Yeah, in the matter of SECONDS... faster than I have the time to process WTF is going on...
<0> http://img65.imageshack.us/img65/4561/pie1wn8.jpg , please help? Even my calculator won't do it. :P
<1> Sorry I'm being so obvious and unhelpful...
<5> |Steve|: You are. Indeed.
<5> spx2: Thanks.
<3> Catfive, could we please have a mathematical FAQ on this channel with links to pages that need to be read for common questions,its getting boring answering some questions that are very commonly asked , i know noone is forcing you to answer but...a faq would be a good thing dont you think ?
<9> feel free to write one
<5> Good answer. :P
<3> Catfive, when its done where should it be put ?
<0> ............................?
<1> % Solve[((Pi^4-4Pi)^2/(6p^16-10)+Pi p-1)^(1/3)==p I E,p
<11> |Steve|:
<11> ToExpression::sntxi: Incomplete expression; more input is needed.
<11>
<11> $Failed
<3> Catfive, can we do it in a wiki style so people may add common question answers to it ?
<1> % Solve[((Pi^4-4Pi)^2/(6p^16-10)+Pi p-1)^(1/3)==p I E,p]
<11> |Steve|: "Time limit exceeded for computation."
<0> :P
<9> we'll consider the question when it exists
<0> Exactly what my calculator told me
<5> Trig substitution is still integration by substitution, yes?
<10> % "Time limit exceeded for computation."
<11> Olathe:
<11> ToExpression::notstrbox: exceeded for limit Time computation . is not a string or a box. ToExpression can only interpret strings or boxes as Mathematica input.
<11> $Failed
<8> Yes, just using trig functions Capso
<0> I need to go.
<5> ozzicle: Alright. Thanks.
<1> Heh, the solution to Irreducibilis's question is moderately horrible.
<3> Catfive, but does there exist a hosting place ?
<5> spx2: Many.
<5> spx2: I can host it.
<3> Capso, nice
<5> I can code the wiki-style if you want something more generic.
<5> ... And compact.
<12> Hello everyone
<12> I am having trouble with this sytems of eqs
<5> ... And easily customisable.
<12> Here's the problem
<12> err - let me paste it to mathbin
<3> Capso, easily to just use somethin already existing
<5> spx2: "if you want"
<5> spx2: Your project. I'm just willing to help. :)
<3> Capso, i think you could invest that time more productively :)
<3> Capso, like searching the logs for common questions
<5> I proposed it because I keep no logs. :/
<3> Capso, but there must be an archive somewhere, and if there is, all the logs may be downloaded somewhere,and a script may be written to identify frequences of patterns to see wich words are common ... except for the usuals "to, at ,where, more, less, when, come ,go , etc"
<3> Capso, one may find for example that quadratic is a common used word
<10> % FromCharacterCode[{84,105,109,101,32,108,105,109,105,116,32,101,120,99,101,101,100,101,100,32,102,111,114,32,99,111,109,112,117,116,97,116,105,111,110,46}]
<11> Olathe: "Time limit exceeded for computation."
<10> Why does that take so long ?
<3> Olathe, please be more intimate with mbot and do your things privately
<13> hi folks. Can someone help me figure out what hyper-rectangles are? I honestly find nothing on the web, other than their applications in machine learning.
<14> ed__: they sound like the equivalent of rectangles in higher dimensions.
<1> ed__: Higher dimensional rectangles.
<12> Ok - so can someone look at this?
<12> http://www.mathbin.net/7467
<12> I guess I am confused about where to begin
<12> I know I try to eliminate the variables
<3> ihope, i had a discussion about those about two days ago and i was banned for beeing annoying
<15> Cpudan80: it might be easier to write it including the 0s
<14> % FromCharacterCode[{84,105,109,101,32,116,97,116,105,111,110,46}]
<3> ihope, maybe if you look in the logs you may find some interesting things
<11> ihope: "Time tation."
<12> So would the next logical step be to multiply line 1 by -2 and add with line 2 ?
<15> so everything lines up
<1> What does 3_{x3} mean?
<14> Olathe: :-)
<12> microacg: ok - fine - but would that be the next step?
<15> that's not a 'step'
<15> that's just making it look nicer
<10> ;)
<13> ihope, |Steve| - that I understand. But I see things like this: you represent them as [a1,b1]....[an,bn]... But I don't even understand how a rectangle is represented this way in 2d space. a and b arent just the X and Y coordinates of corners, are they?
<12> umm ok
<12> Well I mean - you sum the two lines to get a new eq number 2 right?
<14> ed__: sounds plausible.
<13> ihope, what do you mean?
<5> spx2: A perl script with some regex could do that.
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