Identity multi-point constraints (core::Domain::equal_dof's doc
comment): row i ties constrained[i]'s dofs listed in dofs exactly
to the same dofs of retained[i]. dofs is sparse per row — (row, dof) pairs, mirroring ZeroLengthTable::materials's own sparse
convention — since most ties only ever list one or two dofs, not every
dof a node has.
Identity multi-point constraints (
core::Domain::equal_dof's doc comment): rowitiesconstrained[i]'s dofs listed indofsexactly to the same dofs ofretained[i].dofsis sparse per row —(row, dof)pairs, mirroringZeroLengthTable::materials's own sparse convention — since most ties only ever list one or two dofs, not every dof a node has.