I am trying to use the pdetool in matlab to create a 3-D solution of the equation f(x,y) = x*e^(-x^2-y^2). When using the pdetool, I can choose either elliptic, parabolic, or hyperbolic. I then need to specify coefficients c, a, f, and/or d depending on the type. I am new to PDEs and have no idea what the coefficients mean and how to get them from a function like the one I stated before. Also, how do I know what the boundary conditions are going to be? I know what the domain is and can draw that on the tool but the whole PDE coefficients thing and the boundaries is really throwing me off. Thanks in advance for any help!