text: In mathematics,  the Robin boundary condition (; properly ), or third type boundary condition, is a type of boundary condition, named  after Victor Gustave Robin (1855–1897). When imposed on an ordinary or a  partial differential equation, it is a specification of a linear combination of the  values of a function and the values of its derivative on the boundary of the domain. Other equivalent names in use are Fourier-type condition and radiation condition.
  Definition
  Robin boundary conditions are a weighted combination of Dirichlet boundary conditions and Neumann boundary conditions.  This contrasts to mixed boundary conditions, which are boundary conditions of  different types specified on different subsets of the boundary. Robin boundary conditions are also called impedance boundary conditions, from their application in electromagnetic problems, or convective boundary conditions, from their application in heat transfer problems (Hahn, 2012).