A 3d math question.

Discussion in 'Physics & Math' started by Interstella, Oct 17, 2019.

  1. Interstella Registered Member

    Messages:
    63
    x,y / x,y = <z


    Please Register or Log in to view the hidden image!



    This should be an interesting question for you mathematicians !
     
  2. Google AdSense Guest Advertisement



    to hide all adverts.
  3. QuarkHead Remedial Math Student Valued Senior Member

    Messages:
    1,740
    This makes no sense! If x,y is intended to denote a point in the X,Y plane ( equivalent to the vector space \(R^2\)) then it is a vector.

    Vectors add, have additive inverses (which gives you a kind of "subtraction") but they do not multiply (and therefore do not divide). It's a definition, live with it.
     
  4. Google AdSense Guest Advertisement



    to hide all adverts.
  5. Seattle Valued Senior Member

    Messages:
    8,849
    There is where the education comes in.
     
  6. Google AdSense Guest Advertisement



    to hide all adverts.
  7. Interstella Registered Member

    Messages:
    63
    • x,y a circular plane
    • x,y / x,y is an expansion of that plane
    • <z equals the contraction of z why x,y is expanding.
    Have you never heard of centrifugal force contacting a spherical shape and making it oblate ?

    Want to try again with the sense part ?

    Please Register or Log in to view the hidden image!

     
    Last edited: Oct 17, 2019
  8. QuarkHead Remedial Math Student Valued Senior Member

    Messages:
    1,740
    • There is no such thing as a "circular plane". A disk, if that is what you mean, is a subset of the 2-plane \(R^2\) The rest is gibberish

    No thanks
     
  9. sideshowbob Sorry, wrong number. Valued Senior Member

    Messages:
    7,057
    I'm no mathematician but my understanding is that a plane is infinite in all directions and therefore can have no shape and also can not expand.
     
  10. Interstella Registered Member

    Messages:
    63
    There is no such thing as a x,y plane but you recognised I was explaining a disk . Do I sense a bit of arrogance from you ?

    You understood a x,y plane is a disk so I disagree with your attempt to undermine me by word use.
     
  11. Interstella Registered Member

    Messages:
    63
    Not true or they wouldn't call an aeroplane an aeroplane. A plane can be a finite or an infinite plane . Horizontal or vertical planes are just flat in meaning such as a disk , a x,y plane .
     
  12. sideshowbob Sorry, wrong number. Valued Senior Member

    Messages:
    7,057
  13. Interstella Registered Member

    Messages:
    63
    WIKI is inaccurate , to state a plane is infinite when we have not yet established an infinite universe is a false claim .
    Additionally a plane just means flat such as a x,y disk .
     
  14. sideshowbob Sorry, wrong number. Valued Senior Member

    Messages:
    7,057
    Don't confuse mathematics with reality. Mathematics is pretty good at describing reality but it can also go beyond reality. (After all, we don't know what reality is going to look like as new information is added, so we need a flexible system to describe it.)

    Mathematically, a plane is infinite.
     
    Last edited: Oct 17, 2019
  15. DaveC426913 Valued Senior Member

    Messages:
    18,935
    Don't make claims about things you lack knowledge of.
    Read. Ask questions.
    That's how you learn.
     
  16. Jeeves Valued Senior Member

    Messages:
    5,089
    aeroplane?
     
  17. Seattle Valued Senior Member

    Messages:
    8,849
    Maybe he is just plain crazy?
     
  18. origin Heading towards oblivion Valued Senior Member

    Messages:
    11,888
    Now that is pretty funny!
     
  19. Jeeves Valued Senior Member

    Messages:
    5,089
    Just be happy he's dabbling in math instead of explosives!
     
    sideshowbob likes this.
  20. Interstella Registered Member

    Messages:
    63
    But a true statement.
     
  21. Interstella Registered Member

    Messages:
    63
    I wouldn't be stupid enough to dabble in explosives , I'd probably blow myself up and that wouldn't be very bright.
     
  22. DaveC426913 Valued Senior Member

    Messages:
    18,935
    It is not true.

    As sideshowbob points out, objects in mathematics are unconstrained by the real world.

    I can manipulate an object a quadrillion light years on a side in a mathematical plane like it was child's play.

    It is telling about your mathematical prowess that you are unaware of this.
     
  23. DaveC426913 Valued Senior Member

    Messages:
    18,935
    Interstella: it's great that you're interested and inquisitive about math and physics. We live for your kind of enthusiasm. And we don't want to squash it.

    But you don't know what you don't know. You must study.

    How far is the nearest library? Find some books and basic physics and math and get reading.
     

Share This Page