User:Daviddaved/Y-Δ and star-mesh transforms
The effective conductivities and the Dirichlet-to-Neumann operator of a network are invariant under the following star-mesh transform,
Exercise (**). Use the Schur complement formula
for the Dirichlet-to-Neumann map to prove the invariance.
- The Y-Δ transform is a special case of the star-mesh transform in which the center node has the degree 3.