The Definition of Points
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From: Hero on 17 Mar 2007 16:27 Bob Kolker wrote: > Hero wrote: > > > Left and right are geometrical concepts. > > When You write down ( 3, 4 ) 3 is left in Your view and 4 is right. > > 'scuse me. That could be first and second which are temporaal concepts. > So Hamilton, who invented calculation with these ordered pairs, was right about his "science of pure time"? http://www.maths.tcd.ie/pub/HistMath/People/Hamilton/PureTime/ > The Left and Right refer to printing or writing conventions, not to > something intrinsically geometric. > So with Your kind of geometry You can or You can not tell, that DNA is a right screw? With friendly greetings Hero
From: Hero on 17 Mar 2007 16:57 Lester Zick wrote: > Hero wrote: > >PS. I just wonder, if a point relates to the word "pointing"? > > I'm convinced the phrase "pointing out" is definitely related to > "point". You can easily enough "point out" an irrational on a straight > line using rac construction but you can't "point out" a transcendental > on a straight line at all. Using only rac construction ( ruler and compass) results in a geometric handicap. Already before Euclid Hippias of Elis did his quadratrix with other tools. Actually a transcendental, as well as an rational, is a mutual relation to a one, a measure. A point can live an egocentric life, a real number ( not natural number) arises out of a minimum of three points. With friendly greetings Hero
From: Bob Kolker on 17 Mar 2007 17:13 Hero wrote: > > So with Your kind of geometry You can or You can not tell, that DNA is > a right screw? > > With friendly greetings You can tell that right and left are differnt. You can use the hand rules to designate the orientation. In principle one could do the Yang-Lee experiment to tell left from right. If we communicated by radio with beings in a different part of the normal matter universe we could (in principle) give them a procedure for identifying left and right. Bob Kolker
From: VK on 17 Mar 2007 17:29 On Mar 17, 9:23 pm, "Hero" <Hero.van.Jind...(a)gmx.de> wrote: > Left and right are geometrical concepts. Oh, that's ingenious! I was just lurking around, but it's so really awesome as a statement for a linguist - I couldn't resist. So "left and right are geometrical concepts". Good, so you don't mind to play an old game with me? The imaginary concept of left and right was once used in one sci-fi story, so I keep close to it for the simplicity: I'm an E.T. from another planet inside of a perfectly symmetrical cabin. There is only door behind me and in front of me - symmetrical against the door - there are two buttons. Left side button is broken and will explode the cabin. Right side button will send me back to my planet. Alas the words "left" and "right" are not known to me. Your task is by using radio (but no video communication) to instruct me to press the right (in both sense) button. I'm very smart and can draw whatever you will tell me, I just don't know what the hey "left" and "right" is. Care to try to send me to my planet?
From: Bob Kolker on 17 Mar 2007 17:32
VK wrote:> > I'm an E.T. from another planet inside of a perfectly symmetrical > cabin. There is only door behind me and in front of me - symmetrical > against the door - there are two buttons. Left side button is broken > and will explode the cabin. Right side button will send me back to my > planet. Alas the words "left" and "right" are not known to me. Your > task is by using radio (but no video communication) to instruct me to > press the right (in both sense) button. I'm very smart and can draw > whatever you will tell me, I just don't know what the hey "left" and > "right" is. Care to try to send me to my planet?] Send a lengthy radio communication of Yang-Lee's violation of parity hypothesis along with Madame Wu's experiment to verify it. The ET will probably die of old age, but, in principle, this could work. Bob Kolker |