--- a/TODO.md	Mon May 23 07:20:27 2022 +0200
+++ b/TODO.md	Tue Feb 10 22:41:19 2026 +0100
@@ -1,13 +1,10 @@
 # TODO
 
+## Organization
+ - [ ] Split up Notes.md in several files
 
 ## Coding
- - [ ] Ändra namn på variabler och funktioner så att det följer style-guide
- - [ ] Add new Laplace operator to DiffOps, probably named WaveEqOp(?!!?)
  - [ ] Create a struct that bundles the necessary Tensor operators for solving the wave equation.
- - [ ] Replace getindex hack for flattening tuples with flatten_tuple. (eg. `getindex.(range_size.(L.D2),1)`)
- - [ ] Use `@inferred` in a lot of tests.
- - [ ] Replace `@inferred` tests with a benchmark suite that automatically tests for regressions.
  - [ ] Make sure we are setting tolerances in tests in a consistent way
  - [ ] Write down some coding guideline or checklist for code conventions. For example i,j,... for indices and I for multi-index
  - [ ] Clean up RegionIndices
@@ -15,11 +12,14 @@
     2. [ ] Update RegionIndices accordingly
     3. [ ] Fix the rest of the library
     Should getregion also work for getregion(::Colon,...)
- - [ ] Add possibility to create tensor mapping application with `()`, e.g `D1(v) <=> D1*v`?
  - [ ] Add custom pretty printing to LazyTensors/SbpOperators to enhance readability of e.g error messages.
        See (https://docs.julialang.org/en/v1/manual/types/#man-custom-pretty-printing)
  - [ ] Samla noggrannhets- och SBP-ness-tester för alla operatorer på ett ställe
  - [ ] Move export statements to top of each module
+ - [ ] Implement apply_transpose for
+      - [ ] ElementwiseTensorOperation
+      - [ ] VolumeOperator
+      - [ ] Laplace
 
 
  - [ ] Gå igenom alla typ parametrar och kolla om de är motiverade. Både i signaturer och typer, tex D i VariableSecondDerivative. Kan vi använda promote istället?
@@ -27,3 +27,18 @@
  - [ ] Kolla att vi gör boundschecks överallt och att de är markerade med @boundscheck
  - [ ] Kolla att vi har @inline på rätt ställen
  - [ ] Profilera
+
+ - [ ] Keep a lookout for allowing dependencies of package extensions (https://github.com/JuliaLang/Pkg.jl/issues/3641) This should be used to simplify the matrix extensions so that you don't have to load Tokens which is only used internally to the extension
+
+### Grids
+
+ - [ ] Multiblock grids
+ - [ ] Periodic grids
+ - [ ] Grids with modified boundary closures
+ - [ ] Support indexing with `:`.
+
+
+### Benchmarks
+ - [ ] Benchmarks for all grid indexing (focused on allocation)
+ - [ ] Benchmarks for indexing of lazy grid functions
+ - [ ] Add benchmarks for range type in EquidistantGrid. (LinRange vs StepRange)