1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: PDE + shock

  1. Apr 5, 2006 #1
    PDE + shock !!!

    Ux + 2Uy = 0

    I.C: U(x,y=2x) = exp(x)

    using I.C

    No solution since I.C on the characteristics line

    every thing is ok until here but my teacher said that there exist one case that when u change some thing u will get a solution

    how !!!!

    also i want 2 know why discont. or shock occur ???

    i hope u can help me

  2. jcsd
  3. Apr 6, 2006 #2

    Tom Mattson

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    Can you be more specific? I'm not following you.

    Also could you not use "chat room" slang? It took me a while to figure out that "u" means "you" and not the solution to the PDE. Thanks.
  4. Apr 7, 2006 #3
    Also could you not use "chat room" slang? <--- Sorry !!!

    Can you be more specific? <--- ok

    For the PDE there is no solution except one case, what is this case ?
    the proffisor said you can change something to have that case
  5. Apr 7, 2006 #4


    User Avatar
    Science Advisor
    Homework Helper

    If i'm not mistaking, should the characteristics' eq be

    [tex] x+2y=C [/itex] ...?

  6. Apr 7, 2006 #5
    ok ill try it then ill tell you the result

Share this great discussion with others via Reddit, Google+, Twitter, or Facebook