This affects the following subgrid types for which it must be fixed:
[ ] LagrangeSubgridV1
[ ] LagrangeSubgridV2
[ ] LagrangeSparseSubgridV1
This doesn't affect ImportOnlySubgridV1 and ImportOnlySubgridV2, however, so that while technically this is a bug, all optimized grids aren't affected by it.
The method
Grid::convolute_subgridreturns wrong results for many subgrid types because reweighting isn't considered, see also the following comment:https://github.com/N3PDF/pineappl/blob/7b8b306c008ffded9efcd62cb43b0c9b06eb7f6d/pineappl/src/grid.rs#L636
This affects the following subgrid types for which it must be fixed:
LagrangeSubgridV1LagrangeSubgridV2LagrangeSparseSubgridV1This doesn't affect
ImportOnlySubgridV1andImportOnlySubgridV2, however, so that while technically this is a bug, all optimized grids aren't affected by it.