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mattos
  • Member for 8 years
  • Last seen this week
  • Sydney NSW, Australia
9 votes
Accepted

Zeros of a harmonic function

7 votes
Accepted

Using Lie-Trotter Integrators for solving PDEs

6 votes

Find the indefinite integral $\frac{x\sin x}{1+\cos^2 x}$

6 votes

Evaluating the indefinite integral $\int \frac {x^7-1}{\log x}dx$

5 votes
Accepted

Forward Euler PDE (grid method) misunderstanding - Is the question missing a detail

4 votes
Accepted

Implicit and Explicit ODE

4 votes
Accepted

Help solving shallow water equations initial value problem?

4 votes

How to solve a Partial Differential Equation

4 votes
Accepted

How to solve the following nonlinear partial differential equation ?

4 votes
Accepted

Finding Fourier transform of inverse polynomial

4 votes
Accepted

Partial differential equation question: $UU_{x}=(U+1)U_{t}$

4 votes
Accepted

Solving $\int_{0}^{\infty} xe^{-cx^{2}} \sin(tx) \ dx$

4 votes
Accepted

Problem with evaluating the exact value of an integral

4 votes
Accepted

Find the Fourier transform of $\frac1{1+t^2}$

3 votes

How to calculate the sum of digits of $2^n$?

3 votes

Integration problem: $\int x^{2} -x 4^{-x^{2}} dx$

3 votes
Accepted

Solution to ODE using Power Series

3 votes

Proving that an integral is differentiable

3 votes

PDE with inhomogeneous term $u_t + xu_x = x^2$

2 votes
Accepted

Question of partial differential with change of variables.

2 votes
Accepted

Problem with Heat Equation and Laplace Transform

2 votes

Why is the solution of heat equation $f(x,t)= \int_{\mathcal{X}} f_0(x') \sum_{k \geq 1} e^{-t \lambda_k} \phi_k(x) \phi_k(x') \, dx'.$

2 votes

$\left\{\begin{array}{lll} f_{t}+xf_{y}=0\\ f|_{t=0}=f_{0}(x,y) \end{array}\right.$

2 votes
Accepted

How to transform diffusion equation into Burgers equation using Cole-Hopf transformation

2 votes
Accepted

find the general solution and the particular solution of the first order partial differential equation

2 votes
Accepted

Solving a linear PDE: $x^2 u_x - 2u_y - xu = x^2$

2 votes
Accepted

When solving PDE, why this ansatz?

2 votes
Accepted

Solve with eigenfunction expansion $\frac{\partial u}{\partial t} = k \frac{\partial^2 u}{\partial x^2} + e^{-t} + e^{-2t} \cos \frac{3\pi x}{L}$

2 votes
Accepted

Solving $uu_{x_1}+u_{x_2}=u$ with boundary conditions

2 votes
Accepted

Adjoint system associated to a linear system of PDEs

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