discretize.base.BaseRegularMesh.project_edge_to_boundary_edge#
- property BaseRegularMesh.project_edge_to_boundary_edge#
Projection matrix from all edges to boundary edges.
Constructs and returns a matrix \(\mathbf{P}\) that projects from all mesh edges to boundary edges. That is, for a discrete vector \(\mathbf{u}\) that lives on the edges, the values on the boundary edges \(\mathbf{u_b}\) can be extracted via the following matrix-vector product:
ub = P @ u
- Returns
- (
n_boundary_edges
,n_edges
)scipy.sparse.csr_matrix
Projection matrix with shape
- (