Multiresolution Based Grid Adaptation for Triangles and Cartesian Grids#2181

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ad1gan wants to merge 517 commits into

DLR-AMR:mainfrom

ad1gan:mra_triangle

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Commits on Jun 11, 2026

renaming of old function names
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removed .cache
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removed debug outputs
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removed current refinement level
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removed current refinement level
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small refactoring -> cleaning up
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moved scaled detail norm
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adding coarsening/refinement criteria for more abstract interface
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replace coarse/refine by abstract interface
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add test for new criteria interface
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new criteria files
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new structure of the mra module
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better docu
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dunavant/quadrature are now static
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thresholding/convergence are now in criterias
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simplified cstr
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updated docu
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updated test
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updated example
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adding bottom-top strat for init
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refactor projection on leaf
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more docu
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testing bottom-top strat
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changed example
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simplified output
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fixed 3d
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proper 3d plots
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Commits on Jun 12, 2026

add new example with 2 states
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added balance method
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declared balancing from base class
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add balance to first example
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changed floor example
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removed refine in triangle vs. quad
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add jump heuristic in initial data
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makes directory for examples
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refactoring refinement/coarsening routine (similar behaviour)
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adding global normalization
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data are now arrays
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adding global marks
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added pull_up strategy for exchange neigh leafs which are not on same proc
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applying pull-up strat
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adding ghost exchange
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adding repartition
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adding mpi support
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fixing mpi in tests
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Commits on Jun 13, 2026

Merge upstream/main; enable set_for_coarsening in repartition
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changed level in example
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fixed coarsening with mpi
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renaming of the mst routines
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static linkage for gtest
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refactored contains to find in lmi-map
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removed dead/old code
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removed old comments
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refactored levelmulttindex, reduce codedup and easier abstractions
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add shape_traits for different shapes
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refactored shapes using shape_traits
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refactored basis with new shape traits
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Commits on Jun 14, 2026

refactored vtk plotter by abstracting shapes/order
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add normalization to shapes
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renamed scaling to basis_normalization
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removed dead code
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simplified legendre basis
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moved tensor_dg into dg_basis
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add local leaf iterator
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add new function to create lmi_map using a projector
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replacing forest iteration by new helper function
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cleaned up the cleanup
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aadd comments on the moved in function for the projector
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add new data structure for details
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using new detail data structure
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removed dead code and using std::sqrt instead of sqrt
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defaulted and removed dead code
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removed dead code
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using raii for gsl quadrature
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constexpr them all
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refactored legendre_basis using points on the stack
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adding new basis class to collect all different types
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removed basis stuff
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using new basis type
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moving/renaming basis and quadrature
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add unified quadrature interface
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add unified quadrature interface
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replace quadrature by new interface
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created dunavant table from old data
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refactoring dunavant rule (more readable, modern c++)
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adding dunavant table
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new dunavant interface
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Commits on Jun 15, 2026

refactored dubiner scaling functions using three-term recurrence
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optimized triangle projection
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some renaming
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got rid of inv_mask_coeffs
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no inv_mask_coefficient needed anymore
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removed inv_mask_coeffs
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generating maskmatrix via basis functions
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removed old interface
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changed some comments
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fixed ordering in mat
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mask_coefficients now only uses the basis of the functions
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removed old hardcoded mask coeffs
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using new mask coeffs
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removed old mask coeffs
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removed old vec code
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cleaning of old geometry functions
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get rid of old stuff
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using new dg_basis
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adding gradient dg on triangles
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Commits on Jun 16, 2026

add lmi tests
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add test to cmake
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add lmi_map/set tests
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add element_data tests
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add test fixture for num tests
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testing quadrature
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header...
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std lib...
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testing gradient
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testing mask matrix
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testing affine trafos and trafo to ref elements
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header...
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testing mat + lu
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adding test for ref/deref on cartesian
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adding ref/deref on triangles
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add tests for eval/gradient
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add missing test files
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more tests for more shapes
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Commits on Jun 22, 2026

fixed testss with P_DIM = 1
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some comments and fixed eps for numerical tests
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adding mst tests
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add mst test
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adding configs for testing general forest with mra
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adding class for easy tests with mra + forest
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adding smooth, constant and discontinuous function for testing
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adding equal operator for lmi maps
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adding frame for mra_criteria
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testing local treshold values
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adding function to create solution on uniform grids
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detail scaling tests
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different hard_thresholding strategies
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test hartens prediction (steep => neighbour)
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Commits on Jul 1, 2026

adding sharp test for hard thresholding
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testing grading
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adding mra_criteria tests
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added graded function
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added single poly functions
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adding some projection tests
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adding some conservation tests
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adding evaluation for cartesian meshes
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added evaluation for triangular meshes
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testing evaluation
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removed clamp from old bug
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adding reference evaluation
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using reference evaluation
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using reference evaluation
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overriding evaluate for global evaluation in basis
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adding pure virtual function for evaluate
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adding point_query struct for global search
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adding search query to search for the correct cell
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evaluating on global domain
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testing global domain evaluation
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adding mean values
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adding test for mean vals
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adding gradient eval
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testing gradient eval
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adding 1d test functions
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extend tests to 1d
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refactored detect jumps, now using the mean_val function
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refactored test using the new mean_val functions
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fixed tresholding, using mean_val
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Commits on Jul 7, 2026

adding leaf iterator
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using iterator + some refactoring
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refactored refine
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balancing using new leaf iter
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fixed ghost exchange
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global v_max
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refactored adapation routine with new methods
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adding globalize for comm
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renaming/comments/cleaning
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updated inlcudes
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bug: wrong include
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adding mpi tests
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adding mpi tests -> testing with different num procs
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formatting
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removing old comments
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static idx
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using 1ULL for bitshifts
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removed not needed triangle order
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refactoring, using a element_vertex_coords function to give correct coords
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refactoring element_vertex_coords for triangle
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adding some DEBUG macros on idx check
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removed double lookup in local_detail_nrom
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reduced allocs in reference quad points
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fixed test with DEBUG
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devirtualized the multiscale classes -> now using CRTP
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optimized refinement (computing norm only once)
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using std::arrays instead of std::vector in ref values
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reserving of I_set and d_map in mst
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optimized two_scale transformation
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optimized inverse two scale
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single lookup for lmi+data in two_scale
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refactoring coarsening, sweeps only once through level
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refactored leaf iterator, has now a second lambda function for early return
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Commits on Jul 8, 2026

add simple nodal to modal function
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add new modal to nodal header
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simple nodal example
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adding new nodal-modal file
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adding modal to nodal interface
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adding header
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refactored function to give modal representation for given nodal sets
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export adaptive modal solution to nodal forest
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updated example to perform nodal->modal->coarsening->nodal
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adding test_suite for modal<->nodal test
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testing nodal->modal->nodal
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testing exactness of polynomials
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adding chebyshev-lobatto quad points
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starting nodal example form a nonuniform grid
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adding assert for nodal/modal on triangles
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Commits on Jul 10, 2026

adding mpirank to main plot
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disabled avalanching for better performance
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extracted cell geometry operations and put it in one dedicated class
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removed cell operations
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using new cell operation class
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refactored mean
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shorten comments
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adding a function to compute the mean
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adding fac_neighbours lmi map (inverse direction of normal lmi map)
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adding face_neighbour file
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adding missing headers
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adding new tests
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fixed scaling issues in the detail norm
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Commits on Jul 23, 2026

removed some comments
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refactoring: add forest_backend to collect all call to t8_forest
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using new backend for t8_forest
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moved cell geometry to num
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updated cell geometry header
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updated cell geometry header
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updated cell geometry header
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using cell_geometry header + added max_level as public interface
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fixed bug: using comm method
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adding shape traits and separate each shape into its own file
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refactored lmi -> each shape has its own file
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refactore dg with separate shape files
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removed old shape files
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refactoring num with shape separations
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outsourced main functions of adapation into their own file
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deleted old adapation file
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deleted old base file
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refactoring of multiscale module to new structure
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adding element_corner_coords
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introducing shape traits
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updating headers
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updating cmake to new data structure
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