Threads Tagged with pde Thread / Thread Starter Last Post Replies Views http://i53.tinypic.com/ojfq7p.jpg So, I do not think I did this properly, but if f(-x)=-f(x), then u(-x,0)=-u(x,0),... Feb26-11 07:22 AM hunt_mat 5 1,393 Calculus & Beyond Homework Hi, I have a system of coupled PDE's as follows: A1 * (f,xx + f,yy) + B1 * (g,xx + g,yy) + C1 * f + D1 * g = 0 ;... Feb22-11 09:01 AM FrankST 0 1,904 Differential Equations http://oi55.tinypic.com/14diu4k.jpg Could someone tell me where to start? I tried separating variables, which got... Feb15-11 07:08 PM hunt_mat 24 1,574 Calculus & Beyond Homework 1. The problem statement, all variables and given/known data See attached PDF. The whole problem is solved, I just... Feb5-11 10:49 PM Abraham 0 1,173 Calculus & Beyond Homework 1. The problem statement, all variables and given/known data The equation is ut + uux + uxxx = 0 I need to show... Feb5-11 12:06 PM hunt_mat 3 867 Calculus & Beyond Homework Dear All, I am trying to solve the following system of PDEs \frac{\partial{A}}{\partial{t}}=... Feb3-11 04:18 PM jmk9 6 1,887 Differential Equations 1. The problem statement, all variables and given/known data Using Green`s function approach, find the solution to... Jan26-11 07:23 PM jacoleen 0 503 Calculus & Beyond Homework I have rather nasty vector partial diff eq which I think has been addressed before; however, when I vistied a few... Dec29-10 02:21 PM tsunamiBTP 0 2,012 Differential Equations Hi, I need some help, looking at a PDE of the form: F'(x) * F(x) + Cte * F(x) = g(x) Cte is a constant... Dec11-10 01:05 PM JJacquelin 3 1,600 Differential Equations Hi, I am trying to solve the 4th order biharmonic PDE with COMSOL. I'm new to COMSOL and I have been able to draw... Nov24-10 04:21 PM simulator 0 2,129 General Engineering Hi there, I am a young mathematician and I have discovered that Dirichlet's boundary problem is ill posed... Anyone... Nov15-10 04:06 PM arildno 1 1,654 Differential Equations Last night in a lecture my professor explained that some partial differential equations are used to observe events on... Oct26-10 03:23 PM octohydra 0 3,337 General Math I was reading on a textbook and came across a step and I had no idea how the author got the next step from it. This... Oct24-10 12:49 PM Wizlem 2 2,690 Calculus a\text{''}+B*a'-A*a==0 a = 10^-9 a' = 0 a = ? The coefficients A and B are variable over time. I HAVE solved... Oct4-10 12:37 AM Simon_Tyler 1 1,461 Differential Equations From Partial Differential Equations: An Introduction, by Walter A. Strauss; Chapter 1.5, no.4 (b). 1. The problem... Sep9-10 11:24 PM ProtonHarvest 2 2,524 Calculus & Beyond Homework I have spent hours and hours trying to solve a problem until reaching a dead point. I don't know how to solve,... Sep5-10 05:07 PM vargasjc 5 1,501 Differential Equations Hello exalted ones. I am working on a set of differential equations for my research and there is one that is becoming... Sep1-10 11:08 PM vargasjc 6 2,335 Differential Equations 1. Determine the equilibrium temperature distribution for a one-dimensional rod composed of two different materials in... Aug31-10 02:13 PM melizzar 0 3,078 Calculus & Beyond Homework 1. The problem statement, all variables and given/known data getting gen sol of xy3zx+x2z2zy=y3z solve... Aug26-10 01:22 PM jackmell 1 1,484 Calculus & Beyond Homework Hello Everyone, I am trying to solve the following nonlinear PDE which is driven from the Hamilton Jacobi Bellman... Aug6-10 08:35 PM mnourian 0 1,226 Differential Equations deleted Jul24-10 06:46 PM Dickfore 2 744 Calculus & Beyond Homework Post removed Jul18-10 12:33 AM brahnema 0 1,678 Differential Equations I need to solve the following system of differential equations: \frac{\partial^2 y}{\partial t^2} + A\frac{\partial... Apr29-10 04:47 AM Woppe 6 6,800 Differential Equations 1. The problem statement, all variables and given/known data I need to find the shock solution for the initial... Apr20-10 09:32 PM lhy56839 0 818 Calculus & Beyond Homework 1. The problem statement, all variables and given/known data I need to find the shock solution for the initial... Apr20-10 08:51 PM lhy56839 0 929 Precalculus Mathematics Homework Dear Mathematicians and Physicists, In light of the coming fall semester, I am having a decision to take a full... Apr2-10 11:17 AM donnylee 0 1,481 Academic Guidance 1. The problem statement, all variables and given/known data I'm given a standard form of Bessel's equation, namely ... Mar27-10 08:36 PM gabbagabbahey 1 3,442 Calculus & Beyond Homework Hi everyone: I am teaching myself transport/programming, and have created a simple program for 1-D... Mar23-10 11:37 PM clustro 1 3,190 Differential Equations 1. The problem statement, all variables and given/known data Consider the Heat Equation： du/dt=k(d2u/dx2), where d is... Mar14-10 03:32 PM LCKurtz 10 2,734 Calculus & Beyond Homework helloo!! i'm trying to find the Green's function for the modified heat equation $u_t = t * grad(u)$ in n... Mar7-10 04:18 PM kikushiyo 1 1,541 Differential Equations regarding 1-d Head Equations on rods. I am aware of how to long a rod with length x=0 to x=L. and initial conditions... Mar1-10 01:33 AM elibj123 4 2,543 Differential Equations this is gonna sound really dumb, but here is my questions anyways: is (u(x,t))2 the same as u2(x,t)? I say yes, but... Feb7-10 04:04 PM foxjwill 1 452 Calculus & Beyond Homework Hi every one, im having a few problems with some research im doing. I put this in the PDE section as it seams related,... Jan22-10 04:10 AM gato_ 3 2,135 Differential Equations Hi I have seen the expression for mass flow rate in one of the problems I am working on. I used to simply apply the... Dec28-09 02:12 AM Madonmaths 2 1,399 Differential Equations 1. The problem statement, all variables and given/known data Solve this differential equation ... Dec19-09 12:00 AM fraggle 2 917 Precalculus Mathematics Homework well, i have a partial differentiation equation that look like this: c_{1}\frac{\partial^{4}u}{\partial... Oct22-09 02:31 AM mariuspop 0 1,382 Differential Equations I'm working on a P.D.E. homework problem and the one part of it my professor gave us a function and wants us to set it... Sep5-09 08:52 PM Feldoh 1 777 Calculus & Beyond Homework Hello! I have difficulty to solve a PDE. I'm trying to simplify the third order eq. into the second order Airy... Jul9-09 09:53 AM ssatonreb 2 1,509 Differential Equations Hello all! So, I'll be taking first-semester quantum mechanics and partial differential equations this fall, and... May23-09 12:49 PM ice109 5 2,477 Science & Math Textbooks Hi everyone, I believe the term Im looking for is phase diagram. For a oscillating system it is a graph where... Mar4-09 10:47 AM djeitnstine 1 3,877 Differential Equations