Variables of constant functions at cell points

A variable of piecewise constant functions can be defined as follows:

  Grid grid(h,domain);
  Blockgrid grid(&cylinder,n);    // Construction of grid
    ...

  Cell_variable<double> a(grid);

    ...
 

Now, a represents a piecewise constant function on the grid grid . This function is constant on every cell. Differential operators cannot be applied directly to such functions, but they can be used as variable coefficients in a calculation of a local stiffness matrix or stiffness matrix.

Handbook

Last modified: Wed Jun 6 10:31:10 PDT 2001