more clean up

Author: PierreMarchand20

CHANGELOG.md

@@ -26,19 +26,22 @@ All notable changes to this project will be documented in this file.
 
 ## Unreleased
 
+## [0.9.0] - 2024-TBA
+
 ### Added
 
 - The old implementation of `HMatrix` was mixing the distributed operations and compression via hierarchical matrices. This is fixed by replacing `HMatrix` by:
     - `DistributedOperator` which contains a list of local operators and implements all the distributed operations,
     - `VirtualLocalOperator` which is the interface local operators must satisfy,
     - `LocalDenseMatrix` is an example of local operator consisting of a dense matrix `Matrix`,
     - and `LocalHMatrix` which is an example of local operator consisting of a hierarchical matrix based on `HMatrix` (different from the previous `HMatrix`, see below).
-    
 
 ### Changed
 
 - `HMatrix` is now a class representing a hierarchical matrix without distributed-memory parallelism (note that it can still use shared-memory parallelism):
-    - It inherits from `TreeNode`, and it provides the algebra related to hierchical matrices.
+    - It inherits from `TreeNode`, and it provides the algebra related to hierchical matrices:
+        - product with vector and matrix (threaded with OpenMP),
+        - and with this new version, LU and Cholesky factorization (not threaded yet, WIP).
     - The algorithms for building the block cluster tree is contained in `HMatrixTreeBuilder`. Users can provide their own "factory".
 - `VirtualCluster` is removed and the clustering part of the library has been rewritten:
     - `Cluster` now derives from `TreeNode`, whose template parameter corresponds to the precision of cluster nodes' radius and centre (previously only `double`).