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Assembler for global basis transfer matrices

Patrick Jaap requested to merge feature/transfer-matrix into master

The method assembles the transfer matrx between fine and coarse grids. Assumptions are

  • the grids are related but not necessarily direct descendants
  • the global dune-functions basis are scalar, i.e., leaf nodes in the basis tree

For evaluating local functions on other geometries a small wrapper is written. For chaining sequencial father geometries another small wrapper is written.

Two unit tests:

  • first, test wether the transfermatrix interpolates coefficients from corase to fine for lagrange basis
  • second, test wether a jump over two grid levels can be reproduced by two simple transfers
Edited by Patrick Jaap

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